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Ideas for a stout stock stroke 340 build.
#1673972
09/18/14 11:33 PM
09/18/14 11:33 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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I am thinking about building a 30 over 340 "big" motor to have as a backup to this 318, and perhaps at some point replace it  I have access to a nice standard bore 340 with its unturned steel crank, bunch of stuff I wouldn't use,( stock rods and pistons)several stock 340 pans, timing covers, etc for real cheap. I just wondered if say cnc procomp heads, moderate roller cam, zero deck flat top pistons could make 550 horsepower or better? Or any other heads, that are cheap and available If not it wouldn't be a significant enough upgrade to be worth doing. In my old age I am actually back into thinking Dusters/ Darts/ Demons with 340's in them are cool.  
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1673978
09/19/14 01:58 AM
09/19/14 01:58 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Don its much easier with a 416... hell you can make over 550 hp and still run 87 octane... spend a bit more now and save on all the fuel costs and make more torque.. I'm at 590 hp on 416 with 87 octane with W-2s 
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1673979
09/19/14 09:10 AM
09/19/14 09:10 AM
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Joined: Mar 2007
Posts: 1,608
Rudolph, Ohio
moparguy7074
top fuel
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top fuel
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Rudolph, Ohio
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Quote:
I am thinking about building a 30 over 340 "big" motor to have as a backup to this 318, and perhaps at some point replace it
I have access to a nice standard bore 340 with its unturned steel crank, bunch of stuff I wouldn't use,( stock rods and pistons)several stock 340 pans, timing covers, etc for real cheap.
I just wondered if say cnc procomp heads, moderate roller cam, zero deck flat top pistons could make 550 horsepower or better? Or any other heads, that are cheap and available
If not it wouldn't be a significant enough upgrade to be worth doing.
In my old age I am actually back into thinking Dusters/ Darts/ Demons with 340's in them are cool.
You need to talk to Bondo Bob. He has a pump gas 422 in his Dart Swinger with CNC Procomp heads. It is a full stock interior street car, and went 10.50's on the motor. He sprayed it last weekend at MMW and went 6.1? in the 1/8.  What your looking for can definitely be done!
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1673980
09/19/14 06:01 PM
09/19/14 06:01 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
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Washington
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A 416, eddy headed hydro roller motor at 11:1 with 1.875 headers and a strip dominator will EASILY do 575 at 6000 rpm's. Turn it 6800 with the correct cam and it will go over 600. It will idle at 1000 rpm's.
A solid tight lash roller will do 675-680.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Ideas for a stout stock stroke 340 build.
[Re: madscientist]
#1673981
09/19/14 06:54 PM
09/19/14 06:54 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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Frankly, I have already had 9 sec, 10 sec, and 11 sec small block stroker motors in my old car. No doubt they will make more power. This build will be just stock stroke. Don't mind having less torque. Less torque won't break this 8.75 rear I don't want to replace. And will hook easier with this stock suspension deal I have. I have never had a 340 that will run 10's, and my hope is that a well thought out build will achieve that in the current heap that I have. I am probably hard headed  but just want something I haven't already had next time. Be it harder to do or not
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: madscientist]
#1673982
09/19/14 06:56 PM
09/19/14 06:56 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
master
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master
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Posts: 3,414
Toronto
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Quote:
A 416, eddy headed hydro roller motor at 11:1 with 1.875 headers and a strip dominator will EASILY do 575 at 6000 rpm's. Turn it 6800 with the correct cam and it will go over 600. It will idle at 1000 rpm's.
A solid tight lash roller will do 675-680.
80hp from a solid roller?
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Re: Ideas for a stout stock stroke 340 build.
[Re: Belvedere2]
#1673984
09/19/14 07:20 PM
09/19/14 07:20 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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Quote:
I don't think it's impossible just not streetable or inexpensive. My 380 does 550hp but is a 48* W-2 mini stroker that runs on 110. Much easier to follow Mr P's idea on a 416 that runs on 87. You'll be happier in the long run.
I will already have the block and crank, can use shelf diamond pistons and probably like a scat H beam rod. Won't be real expensive at all. Lots of stuff I already have.
Don't really care about having to maybe mix 110. It's 6.99 a gallon here, and it's not like I have the time to log a ton of miles on the street. So even if it costs me 300 extra a summer for fuel( unlikely) that isn't enough of a negative to matter to me. Don't think it needs to be radical to run 10's even in a 3400 pound car. Just need good heads.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1673985
09/19/14 07:42 PM
09/19/14 07:42 PM
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Joined: Feb 2009
Posts: 207
People's Republic of Mass.
Belvedere2
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People's Republic of Mass.
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Quote:
Quote:
I don't think it's impossible just not streetable or inexpensive. My 380 does 550hp but is a 48* W-2 mini stroker that runs on 110. Much easier to follow Mr P's idea on a 416 that runs on 87. You'll be happier in the long run.
I will already have the block and crank, can use shelf diamond pistons and probably like a scat H beam rod. Won't be real expensive at all. Lots of stuff I already have.
Don't really care about having to maybe mix 110. It's 6.99 a gallon here, and it's not like I have the time to log a ton of miles on the street. So even if it costs me 300 extra a summer for fuel( unlikely) that isn't enough of a negative to matter to me. Don't think it needs to be radical to run 10's even in a 3400 pound car. Just need good heads.
Hmmm. True. Do you think W-9s would be feasible? Not sure but they might flow in the 300s with mild cleanup. Course that makes acces. parts more exotic. I'm just not well versed in other heads. I like my W-2s.
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Re: Ideas for a stout stock stroke 340 build.
[Re: Belvedere2]
#1673987
09/19/14 07:59 PM
09/19/14 07:59 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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Quote:
Quote:
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I don't think it's impossible just not streetable or inexpensive. My 380 does 550hp but is a 48* W-2 mini stroker that runs on 110. Much easier to follow Mr P's idea on a 416 that runs on 87. You'll be happier in the long run.
I will already have the block and crank, can use shelf diamond pistons and probably like a scat H beam rod. Won't be real expensive at all. Lots of stuff I already have.
Don't really care about having to maybe mix 110. It's 6.99 a gallon here, and it's not like I have the time to log a ton of miles on the street. So even if it costs me 300 extra a summer for fuel( unlikely) that isn't enough of a negative to matter to me. Don't think it needs to be radical to run 10's even in a 3400 pound car. Just need good heads.
Hmmm. True. Do you think W-9s would be feasible? Not sure but they might flow in the 300s with mild cleanup. Course that makes acces. parts more exotic. I'm just not well versed in other heads. I like my W-2s.
Those cnc pro comps like bondo has went high 280's on a reputable bench. He built a 60 over 340 with 4 inch crank at 9.5 compression and has already been 10.57 in his bench seat swinger. I figure his crank is probably 3 tenths better than similar build stock stroke. But I would have well more than 9.5 compression. Think a head like that
will sneak into the 10's with stock stroke. Without working up a ton of sweat and be very street able.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1673989
09/19/14 09:16 PM
09/19/14 09:16 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
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Washington
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Quote:
I am thinking about building a 30 over 340 "big" motor to have as a backup to this 318, and perhaps at some point replace it
I have access to a nice standard bore 340 with its unturned steel crank, bunch of stuff I wouldn't use,( stock rods and pistons)several stock 340 pans, timing covers, etc for real cheap.
I just wondered if say cnc procomp heads, moderate roller cam, zero deck flat top pistons could make 550 horsepower or better? Or any other heads, that are cheap and available
If not it wouldn't be a significant enough upgrade to be worth doing.
I apologize for not reading closer.
Let me say this about what you wrote: not sure on the pro comp heads. Didn't like the BB heads I have done but they are ok. If you spend the time on the intake manifold (most guys skip over this but it is a big deal) and get it correct, and your headers are good 550 is not out of the question. 500 is 1.47 HP/CI so it needs to be properly spec'd. 550 is 1.6 HP/CI. You will have to have you crap wired tight to get there but it is doable.
In my old age I am actually back into thinking Dusters/ Darts/ Demons with 340's in them are cool.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Ideas for a stout stock stroke 340 build.
[Re: madscientist]
#1673990
09/19/14 09:38 PM
09/19/14 09:38 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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Just reread an old Mopar Muscle magazine article from 2003. They took a stock stroke 340, bolted on W9 heads that were pretty much stock( minor work, they went 280@.600) and with a 260@50 roller made 602 horse at 7000rpm  I don't know how much better that head is than the procomp cnc I am thinking about, but it can't be much better, if it is at all 
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: cudadoug]
#1673992
09/20/14 04:49 AM
09/20/14 04:49 AM
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Joined: Jan 2003
Posts: 20,158
Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
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Park Forest, IL
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The guys in Stock are well into the 10's with a stock stroke, stock heads, stock intake and carb, and stock lift. They are pretty close to your weight too.
Yes, I know that it's comparing apples and oranges, but a lot of their power comes from meticulous assembly and lots of little tricks.
I would think with the same care and better induction, heads, and camshaft you should be able to get close to the power they make without being ragged edge.
"Everybody funny, now you funny too."
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Re: Ideas for a stout stock stroke 340 build.
[Re: slantzilla]
#1673993
09/20/14 10:43 AM
09/20/14 10:43 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
The guys in Stock are well into the 10's with a stock stroke, stock heads, stock intake and carb, and stock lift. They are pretty close to your weight too.
Yes, I know that it's comparing apples and oranges, but a lot of their power comes from meticulous assembly and lots of little tricks.
I would think with the same care and better induction, heads, and camshaft you should be able to get close to the power they make without being ragged edge.
and hundreds of hours testing and swapping parts, very expensive not to mention rpms they have to spin them
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Re: Ideas for a stout stock stroke 340 build.
[Re: Quicktree]
#1673994
09/20/14 10:56 AM
09/20/14 10:56 AM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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Stock eliminator build, while trick, is still very limited head and induction wise, the two areas where not having such limits are helpful.
I am pretty positive what I want to do isn't that hard. 550 or so isn't that much steam with good heads and combination, even at 340 something inches. I don't want to spin this thing much past 7k either. Shouldn't have to either.
Maybe some skipped my reference couple of posts up to that 340/w9 build that broke 600 horse@ 7000 rpm. Dyno's are dyno's and would love to see what that motor ran in a car..... Buts the heads were supposedly barely touched and only went 280.
The heads I would use I think would likely be just as good, if not better.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1673995
09/20/14 12:01 PM
09/20/14 12:01 PM
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Joined: Feb 2007
Posts: 2,578
sweden
1Fast340
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master
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sweden
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Quote:
Stock eliminator build, while trick, is still very limited head and induction wise, the two areas where not having such limits are helpful.
I am pretty positive what I want to do isn't that hard. 550 or so isn't that much steam with good heads and combination, even at 340 something inches. I don't want to spin this thing much past 7k either. Shouldn't have to either.
Maybe some skipped my reference couple of posts up to that 340/w9 build that broke 600 horse@ 7000 rpm. Dyno's are dyno's and would love to see what that motor ran in a car..... Buts the heads were supposedly barely touched and only went 280.
The heads I would use I think would likely be just as good, if not better.
i have seen that W9 article more than once and its a build that seems like a fun one for sure.
however i doubt a procomp head will get even close to what that W9 does,better sparklplugglocation,better chamber and most scertainly those raised ports will do things to power that a flowbench probably never will tell you about.
i think you are going to need 7500rpm shiftpoints and a fairly temperamental cam to make 550Hp and get solidly into the 10´s with any stock replacement type heads, i think with the stock stroke a better head would make these goals alot easier on parts and a nicer running engine with a wider usable range with lower shiftpoints.
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1674000
09/20/14 03:31 PM
09/20/14 03:31 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
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The down side to a W-9 deal is headers , intake and cooling system.
You need to be creative with two and lucky with the other.
I'd look at a Super Commando / Indybrock / Procomp kind of deal if you need aluminum or a W-2 if not.
10's is awfully ambitious , but not impossible.
Good post!!
Remember Bondo just went 10.57 with the procomps( first outing) at 9.5 compression in a bench seat swinger. I know the 4 inch crank helps, but no more than3 or 4 tenths, with a relatively small head like that .And I wouldn't be at 9.5 compression either. so make up some power on that front.
Local racer( who sometimes posts on here) has a 340 with J heads and a flat tappet(3100 pound Duster) that has been 11.00's a number of times. His heads go I believe 251max. Ran teens at Norwalk. It's been together a few years now.
Sounds like you had your mind made up and nobody is going to tell you any different. Not sure why you asked for input ??
If you can gain 3-4 tenths with a 5-$600 crank...and have it be more streetable...why wouldn't you ??
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Re: Ideas for a stout stock stroke 340 build.
[Re: ]
#1674001
09/20/14 04:41 PM
09/20/14 04:41 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
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Quote:
Quote:
Quote:
The down side to a W-9 deal is headers , intake and cooling system.
You need to be creative with two and lucky with the other.
I'd look at a Super Commando / Indybrock / Procomp kind of deal if you need aluminum or a W-2 if not.
10's is awfully ambitious , but not impossible.
Good post!!
Remember Bondo just went 10.57 with the procomps( first outing) at 9.5 compression in a bench seat swinger. I know the 4 inch crank helps, but no more than3 or 4 tenths, with a relatively small head like that .And I wouldn't be at 9.5 compression either. so make up some power on that front.
Local racer( who sometimes posts on here) has a 340 with J heads and a flat tappet(3100 pound Duster) that has been 11.00's a number of times. His heads go I believe 251max. Ran teens at Norwalk. It's been together a few years now.
Sounds like you had your mind made up and nobody is going to tell you any different. Not sure why you asked for input ??
If you can gain 3-4 tenths with a 5-$600 crank...and have it be more streetable...why wouldn't you ??
Yes... I do have my mind made up. That's why the title of my post said" ideas on how to make a stout STOCK stroke 340".
Instead most everyone keeps saying why not build a stroker instead of stock stroke.
I have had a number of strokers. Just want to do something different this time.
Doesn't appear many have tried this, I am interested to give it a shot.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1674003
09/20/14 06:13 PM
09/20/14 06:13 PM
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Joined: Feb 2007
Posts: 2,578
sweden
1Fast340
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Quote:
Quote:
Quote:
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The down side to a W-9 deal is headers , intake and cooling system.
You need to be creative with two and lucky with the other.
I'd look at a Super Commando / Indybrock / Procomp kind of deal if you need aluminum or a W-2 if not.
10's is awfully ambitious , but not impossible.
Good post!!
Remember Bondo just went 10.57 with the procomps( first outing) at 9.5 compression in a bench seat swinger. I know the 4 inch crank helps, but no more than3 or 4 tenths, with a relatively small head like that .And I wouldn't be at 9.5 compression either. so make up some power on that front.
Local racer( who sometimes posts on here) has a 340 with J heads and a flat tappet(3100 pound Duster) that has been 11.00's a number of times. His heads go I believe 251max. Ran teens at Norwalk. It's been together a few years now.
Sounds like you had your mind made up and nobody is going to tell you any different. Not sure why you asked for input ??
If you can gain 3-4 tenths with a 5-$600 crank...and have it be more streetable...why wouldn't you ??
Yes... I do have my mind made up. That's why the title of my post said" ideas on how to make a stout STOCK stroke 340".
Instead most everyone keeps saying why not build a stroker instead of stock stroke.
I have had a number of strokers. Just want to do something different this time.
Doesn't appear many have tried this, I am interested to give it a shot.
i will repeat it,get some real good heads and you can do it, sawing money doing it with "stockstyle" heads is harder than needed and you will get a much better engine with better heads. look at any modern pushrod V8 and see how they make power,they do it with great heads and much milder cams than would be used in oldschool engines with heads that are crap by comparison and i dont care what cnc ported Procomps flow there is much better heads out there but they will cost you more in valvetrain
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1674004
09/20/14 06:49 PM
09/20/14 06:49 PM
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Joined: Apr 2009
Posts: 3,414
Toronto
mshred
master
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master
Joined: Apr 2009
Posts: 3,414
Toronto
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Quote:
Quote:
Quote:
Quote:
The down side to a W-9 deal is headers , intake and cooling system.
You need to be creative with two and lucky with the other.
I'd look at a Super Commando / Indybrock / Procomp kind of deal if you need aluminum or a W-2 if not.
10's is awfully ambitious , but not impossible.
Good post!!
Remember Bondo just went 10.57 with the procomps( first outing) at 9.5 compression in a bench seat swinger. I know the 4 inch crank helps, but no more than3 or 4 tenths, with a relatively small head like that .And I wouldn't be at 9.5 compression either. so make up some power on that front.
Local racer( who sometimes posts on here) has a 340 with J heads and a flat tappet(3100 pound Duster) that has been 11.00's a number of times. His heads go I believe 251max. Ran teens at Norwalk. It's been together a few years now.
Sounds like you had your mind made up and nobody is going to tell you any different. Not sure why you asked for input ??
If you can gain 3-4 tenths with a 5-$600 crank...and have it be more streetable...why wouldn't you ??
Yes... I do have my mind made up. That's why the title of my post said" ideas on how to make a stout STOCK stroke 340".
Instead most everyone keeps saying why not build a stroker instead of stock stroke.
I have had a number of strokers. Just want to do something different this time.
Doesn't appear many have tried this, I am interested to give it a shot.
Build it man! I still wish I kept my engine stock stroke, I love a small engine that can run hard!
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Re: Ideas for a stout stock stroke 340 build.
[Re: mshred]
#1674005
09/21/14 02:02 PM
09/21/14 02:02 PM
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Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
herkamer
pro stock
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pro stock
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Posts: 1,305
Lakewood, Colorado
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I'm building essentially the same thing with my 340. I wanted a mean, fairly streetable 340. This was before stroker cranks were so cheap and readily available. No sense changing plans now. Stock stroke, full hydraulic roller with 11:1 compression, Indybrock heads going in a 69 Dart. A500 trans with 3000 stall, and 4.30 gears should motivate it pretty well and allow some highway jaunts. When I was planning, I ran it through Desktop Dyno and it estimated around 500HP. I have no clue exactly how close that will be to the final product. Back in the 90's I know my brother had a W2 head 340 in a 67 Barracuda race car that ran 11.2 here at 6000' in Denver. Apparently with a 4 speed the car previously ran 10.9 or 10.8. No doubt with the newer parts that could easily replicated and improved upon today. I'm hoping to have mine going before too long, and get some dyno time also. I may put it in another 67 Barracuda to get some seat time with it. Definitely interested in seeing how this thread goes. Perhaps I'll be inspired to get mine done soon!
Matt
69 Dart Swinger 340
83 W350, Megasquirted with 46RH
Old news: 72 Demon street/race mobile
Latest: 70 Duster backhalf car
and even more
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1674006
09/21/14 06:17 PM
09/21/14 06:17 PM
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Joined: Dec 2005
Posts: 205
ohio
prochamp
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ohio
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hi don.all i run in my cuda is factory stock stroke 340's.one of my combos is ported w2's flat top's at 10:1 comp solid street roller .550 lift 242@.050.victor w2 intake 800 thermoquad.17/8 hedman headers.low gearset 904 trans w 5000 stall 8 inch converter.4.86 83/4 rearend @ 3100lbs went a best of 10.39@ 127 mph.that thing sounds like a stock 340 @ idle with lots of vacuum but has torque like you wouldn't believe from a 340.very streetable.
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1674012
09/23/14 09:58 AM
09/23/14 09:58 AM
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Joined: Jun 2005
Posts: 2,776
Ontario Canada
MattW
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Quote:
I am thinking about building a 30 over 340 "big" motor to have as a backup to this 318, and perhaps at some point replace it
I have access to a nice standard bore 340 with its unturned steel crank, bunch of stuff I wouldn't use,( stock rods and pistons)several stock 340 pans, timing covers, etc for real cheap.
I just wondered if say cnc procomp heads, moderate roller cam, zero deck flat top pistons could make 550 horsepower or better? Or any other heads, that are cheap and available
If not it wouldn't be a significant enough upgrade to be worth doing.
In my old age I am actually back into thinking Dusters/ Darts/ Demons with 340's in them are cool.
Don't know if this link will work but Dodge/Plymouth/Chrysler/Mopar Crate Engine
Jesse is a member on here goes by RAMM.
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Re: Ideas for a stout stock stroke 340 build.
[Re: MattW]
#1674013
09/23/14 02:30 PM
09/23/14 02:30 PM
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Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
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I'm still in the very early stages witn my 340, but to me ti seems that 500+ hp is no problem. To be honest, my engine is not stock stroke, it's got 3.35" stroke. Bought the crank used with an aluminum flywheel for 200, and have no idea of where it's from. It's an 8-bolt unit with still std size rod journals. Anyway, it's got stock length H-profile steel rods, .030 oversize Mahle flat top pistons, self made oil pan & pump & piskup setup, mech roller cam with 265/270 degrees and .440 lobe lift, bought used from moparts. The heads were also bought from moparts, a complete set of W2's and a Victor 340 W2 intake. I ported the heads, there is 1 7/8" headers, 3.5" echaust pipes and mufflers The carb is a 750 HP holley with a 2" open spacer, and the distributer is a mopar cast iron unit with MSD 6 AL. So far I haven't tuned it at all, just set the timng and idle. I have run the car succesfully only once, and I have never driven a manual hard either at the strip or street. The valve springs had only about 140 lbe seta pressure, so I llimited teh RPM to 7000. The clutch didn't work properly and the car started to crawl when the rpm got up, didn't have a two step or line lock, so the launches were pretty soft. Still the car run 10.36/132.5 at an airport against the limiter. I really don't want a stroker at the moment! The second time out, there was a good track, the clutsh worked, and now I'm looking for a spool and 35 spline axles... HJere are the three more or less succesful runs https://www.youtube.com/watch?v=sDNpATHzTN0b
Plynouth VIP '67 TT IC EFI
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Re: Ideas for a stout stock stroke 340 build.
[Re: jyrki]
#1674014
09/23/14 03:00 PM
09/23/14 03:00 PM
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Joined: Jan 2003
Posts: 9,870
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,870
Weddington, N.C.
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A 340 is a short stroke but it's not really a small motor  The issue with the 340 (in todays way of thinking) is the piston is HEAVY and the real way to take advantage of the short stroke is to lighten the piston and use a longer rod. I grew up in a time (late 70's) when I personally remember pulling out 440 RB's out of B bodies and dropping in 340 W2's with Isky solids and the cars going faster. Back when high 11's was a respectably quick street car...and the car you drove to work every morning. 4.30's and 4.56 went in at the same time, not much fun for those guys cruising the GSP or NJT at 3800 rpm...but they were winning. I'd try to use a 2.100 or 2.00" SBC journal rod and a 6.25" 6.30 rod, if you want to keep it stock stroke the piston CH will only move up <.200 but it will help the weight by also using the lighter SBC pin. Some guys are using .812 SBF pins too. To keep it streetable in terms of grunt probably a 255-ish @.050 solid fairly wide 111-113 and in around 107, with a 285-ish CFM head and good valvetrain you should make 500+ at about 6400 or so at a streetable 11-ish CR....plus have decent (but not great) bottom end torque. If it were me I'd offset grind it to 3.45-ish and get the slug that much lighter and pick up a few more cubes....or (cheaper) just do a 360.  my old W2 340 dart 4 speed went high 11.80's 33 some years ago on street tires hazing in 1st and second....back in 1980. it was steetable, V gate and all. Fun times. 340's with a stick are still one of the most fun combos I've ever driven, I loved beating cars sporting 60-100 more cubes. Of course I never tipped my hand I was sportin' the W-2's...would you?
Last edited by Streetwize; 09/23/14 03:03 PM.
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Re: Ideas for a stout stock stroke 340 build.
[Re: Streetwize]
#1674016
09/23/14 03:11 PM
09/23/14 03:11 PM
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Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
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I've got 4.56 gears. Have no idea of what is "stret able", all of my cars have and if I had funds, I would come to drag week. A bit off thesubject, but here s the very first run with the car, no clutch at all the cr was pushed to stageand then I just smashed the first gear in off idle..., or so I thoght; it was 3rd, then never driven the car before, trying to find the frst ear with the vertical gate...unforgettable moments. https://www.youtube.com/watch?v=zfpT4JJ6xQY
Plynouth VIP '67 TT IC EFI
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Re: Ideas for a stout stock stroke 340 build.
[Re: goldduster318]
#1674019
09/23/14 10:16 PM
09/23/14 10:16 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 11,705
Portage,michigan
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Quote:
Quote:
Don, contact or Google Mike @ MRL Performane. He posted on another board not too long ago a 3.310" stroke 340 build he did that was pretty impressive and seemingly streetable.
I think you are talking about my engine that made 470hp and 455 lb-ft? http://www.forabodiesonly.com/mopar/showthread.php?t=241854
It's very streetable. I run it in a car with 3.23's and a 4-speed and you can drive it however and wherever you want. In the car I idle it at about 900 (has a slight lope) and it has about 13 in Hg vacuum. Getting about 13 mpg city. Goes pretty well.
Here's a video (sorry no dash). It really goes.
https://www.youtube.com/watch?v=BxQkNYRDAD8
The 318 that is in my car now( as currently configured) made 480/ 451 torque. It's got a tiny cam in it, but it makes more torque than a much bigger flat tappet solid lifter cam did. Drives and idles nicely.
I am interested in something 70-80 more horsepower.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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Re: Ideas for a stout stock stroke 340 build.
[Re: B3422W5]
#1674020
09/23/14 10:51 PM
09/23/14 10:51 PM
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Joined: Oct 2006
Posts: 149
N. Of Detroit, Mi
733404spdCuda
member
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member
Joined: Oct 2006
Posts: 149
N. Of Detroit, Mi
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My 340 / 378
340 Block 4.100"
3.58 eagle Crank
2.100 eagle sbc H Beam rods
Diamond Piston 9.5 comp
Edelbrock 63CC Heads CNC ported my MCH
Houghs 1.6 roller rockers
Solid 243/251 duration @ .050" .550/.570 lift
Edelbrock RPM Intake
Kevco pan with baffles
750 quickfuel carb
520HP @ 6200 and 490TQ @4500 (dyno sheet attached)
with more compression this motor should have made 550hp
Last edited by 733404spdCuda; 09/23/14 11:11 PM.
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Re: Ideas for a stout stock stroke 340 build.
[Re: 733404spdCuda]
#1674021
09/23/14 11:07 PM
09/23/14 11:07 PM
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Joined: Jan 2003
Posts: 11,705
Portage,michigan
B3422W5
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 11,705
Portage,michigan
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Quote:
My 340 / 378
340 Block 4.100"
3.58 eagle Crank
2.100 eagle sbc H Beam rods
Diamond Piston 9.5 comp
Edelbrock 63CC Heads CNC ported my MCH
Houghs 1.6 roller rockers
Solid 243/251 duration @ .050" .550/.570 lift
Edelbrock RPM Intake
Kevco pan with baffles
750 quickfuel carb
520HP @ 6200 and 490TQ @4500
with more compression this motor should have made 550hp
Nice combo
Yep, more compression, more lift to use the heads, and probably even a 950 would get it over 550 easy.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, 10.40 @127 1/4
1.41 best 60 foot
6.60 at 103.90 1/8
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mighty impressive combo. didn't know all your stuff was stock stroke, Rob.
