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Help with my new 340 build up
#1257740
06/26/12 02:19 PM
06/26/12 02:19 PM
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Joined: May 2004
Posts: 246
Jackson Michigan
67barrracuda
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 246
Jackson Michigan
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Looking to build my first 340 sb and would like to see 450-500hp with a 750 dominator carb. I like aluminum heads, but which one. Whats the difference between the w2,w5,and w8 heads. Any help to point me in the right direction is greatly appreciated.
Thanks
67barrracuda
Jackson Michigan
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257741
06/26/12 02:27 PM
06/26/12 02:27 PM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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I dont think you need anything but an out of the box eddy head to make the 500 hp your requiring, if your willing to stroke it. I just made 511 hp with stock eddy heads, an air gap intake and a 750 HP carb. MY 430 BUILD
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257743
06/26/12 02:34 PM
06/26/12 02:34 PM
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Joined: Apr 2007
Posts: 2,027
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,027
Trumbull,CT.
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Quote:
Looking to build my first 340 sb and would like to see 450-500hp with a 750 dominator carb. I like aluminum heads, but which one. Whats the difference between the w2,w5,and w8 heads. Any help to point me in the right direction is greatly appreciated.
Thanks
67barrracuda
W2,W5 and especially W8s are overkill for those levels.......not to mention alittle "involved".
Stick a 4in arm in that thing with a touched uo Eddy and you'll have a nice street combo with plenty of steam.
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Re: Help with my new 340 build up
[Re: Triple Threat]
#1257745
06/26/12 05:19 PM
06/26/12 05:19 PM
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Joined: May 2004
Posts: 246
Jackson Michigan
67barrracuda
OP
enthusiast
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OP
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Posts: 246
Jackson Michigan
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What I have is a 67 barracuda notchback , auto trans, 3.91 posi, 29" drag radials. Looking to build something to push it into the 11's, but be very streetable and run cool. I could build a stroker, but is it worth the money if I'm not looking for a 600hp motor. I see a lot of different head choices out there for sb mopars and was looking for what combinations really worked.
Jackson Michigan
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257747
06/26/12 06:04 PM
06/26/12 06:04 PM
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Joined: Jan 2003
Posts: 5,486
SoCal
Brian Hafliger
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master
Joined: Jan 2003
Posts: 5,486
SoCal
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If you go with a 4" crank deal, and RHS heads like the ones IMM sells you'll be into the mid-low 11's.
Easy to get 480HP from a nice hyd. cam, rpm airgap intake and 10.2:1 compression.
Brian
Brian Hafliger
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Re: Help with my new 340 build up
[Re: Brian Hafliger]
#1257748
06/26/12 06:11 PM
06/26/12 06:11 PM
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Joined: Jan 2003
Posts: 11,718
Portage,michigan
B3422W5
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,718
Portage,michigan
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You can get well into the 11's without a stroker.
Little brother has a 9-1 360, ported eddies, weiand excellerator, dinky small tube headers( its a 66dart gt) 750 holley, and a healthier than it needs to be flat tappet cam and runs 11.40's without working up a sweat.Can drive the thing anywhere.
I have a bauudy who ran 10.90's with a comp cams 525/305 hydralic cam in a 360 but had some compression with eddies that werent ported.
Good eddies and matching parts and 11's are real easy.
Last edited by B3422W5; 06/26/12 06:12 PM.
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: Help with my new 340 build up
[Re: DJVCuda]
#1257749
06/26/12 08:24 PM
06/26/12 08:24 PM
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Joined: Jun 2010
Posts: 3,112
LONG ISLAND
fishy340
master
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master
Joined: Jun 2010
Posts: 3,112
LONG ISLAND
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Quote:
I dont think you need anything but an out of the box eddy head to make the 500 hp your requiring, if your willing to stroke it.
I just made 511 hp with stock eddy heads, an air gap intake and a 750 HP carb.
MY 430 BUILD
with a 340 done right,super easy w A 4" crank for some cubes...and a lightly touched up set of eddy's..if i were you i'd do it with a hyd roller cam,no maint type deal 
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Re: Help with my new 340 build up
[Re: RobX4406]
#1257751
06/26/12 10:46 PM
06/26/12 10:46 PM
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Joined: May 2004
Posts: 246
Jackson Michigan
67barrracuda
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 246
Jackson Michigan
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Thanks for all the good information.
OK, this is what I'm thinking.
stroke the motor ( what need to be done to the block for a stroker kit)
eddy heads (out of the box)
air gap intake
750 carb
Which cam and how much compression?
Jackson Michigan
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257752
06/26/12 10:54 PM
06/26/12 10:54 PM
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Joined: May 2004
Posts: 246
Jackson Michigan
67barrracuda
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 246
Jackson Michigan
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Is there any year 340 block better any another?
I have a chance to pick up a 72 bare block for $250, do you think it's worth it?
Jackson Michigan
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257754
06/27/12 09:04 AM
06/27/12 09:04 AM
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Joined: Aug 2003
Posts: 11,179
Atco NJ
DJVCuda
I Live Here
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I Live Here
Joined: Aug 2003
Posts: 11,179
Atco NJ
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Quote:
stroke the motor ( what need to be done to the block for a stroker kit)
eddy heads (out of the box)
you might need to notch the bottoms of the cylinders depending on what rods and stroke you use.
and eddy's out of the box is a bad idea - have them gone through by a machine shop - mine OOTB were too tight on the valve guides and had a bunch of intake valves with too much seat runout. They also had alot of left over chunks in the water passages from being machined at teh factory.
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Re: Help with my new 340 build up
[Re: RobX4406]
#1257755
06/27/12 09:52 AM
06/27/12 09:52 AM
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Joined: Jun 2010
Posts: 3,112
LONG ISLAND
fishy340
master
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master
Joined: Jun 2010
Posts: 3,112
LONG ISLAND
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Quote:
A 340 will have to turn to get that HP. Most of the ones I've seen turn around 6500 to get there with rhs/ede heads.
I'd look at a stroker with some heads,IMM RHS, ede's with some work, much easier to get the number and don't have to turn it more than about 5500 with a 3.90 gear in the back. A good working car will run mid 11's or faster pretty and still be docile around the street.
not really my sb 340 that made 506hp did it all by 5800rpm the tq was nice like 540ish..my friends use to laugh cause i would shift at 6ooo they thought i wasnt bringing it high enough.
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257757
06/27/12 02:03 PM
06/27/12 02:03 PM
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Joined: Jan 2003
Posts: 6,266
Renton Washington
Triple Threat
master
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master
Joined: Jan 2003
Posts: 6,266
Renton Washington
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Edelbrocks are fine, or the RHS heads from Brian at IMM. But what people are saying is you should have them checked by your machine shop before bolting them on the engine. Being a mass produced item things often slip through the cracks.
I didn't have mine checked, and mine were fine but I was taking a gamble and I knew that. As a broke college student it was my only option.
If you get the RHS heads from IMM, Brian assembles them, so they would not need to be checked again.
-Dustin
67 Dart, 9 second, 392" G3 Hemi
68 Barracuda 340 F/SA
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Re: Help with my new 340 build up
[Re: fishy340]
#1257758
06/27/12 02:12 PM
06/27/12 02:12 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
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Quote:
Quote:
A 340 will have to turn to get that HP. Most of the ones I've seen turn around 6500 to get there with rhs/ede heads.
I'd look at a stroker with some heads,IMM RHS, ede's with some work, much easier to get the number and don't have to turn it more than about 5500 with a 3.90 gear in the back. A good working car will run mid 11's or faster pretty and still be docile around the street.
not really my sb 340 that made 506hp did it all by 5800rpm the tq was nice like 540ish..my friends use to laugh cause i would shift at 6ooo they thought i wasnt bringing it high enough.
Stock stroke? With which head and how much additional work? Doubt it got there with an OOTB ede head without a 4" arm.
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Re: Help with my new 340 build up
[Re: sshemi]
#1257760
06/27/12 04:26 PM
06/27/12 04:26 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Id go with ebrocks because the rhs are really heavy
Brians heads will beat the ootb ede's for power pretty easily for roughly the same money as the ede's before correction. More than make up for any weight penalty. Budget sounds like a concern here.
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Re: Help with my new 340 build up
[Re: 1Fast340]
#1257763
06/27/12 05:24 PM
06/27/12 05:24 PM
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Joined: Oct 2003
Posts: 11,684
W. Kentucky
justinp61
I Live Here
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I Live Here
Joined: Oct 2003
Posts: 11,684
W. Kentucky
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My Dart went 7.42 in the 1/8 at #3240 with my stock stroke 340 and 4.30 gears shifting at 6400. It only picked .006 over the 3.91 set I had in it before. My Edelbrocks were ported by Curtis Boggs, it had a Hughes 3742 flat hydraulic cam, 11.2-1 compression and a Weaind X-Celerator single plane intake with a Quick Fuel Q-750 on it. According to the online calculators it made in the 450 hp range  . I drove it a lot and once I installed a mechanical fan and shroud it never had any overheating issues, plus it ran on pump 93. Personally I like all the benifits that go along with the aluminum heads . I now have a 408 and it's a bear but also a lot more $$$ than I had in the 340.
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Re: Help with my new 340 build up
[Re: 1Fast340]
#1257764
06/27/12 05:50 PM
06/27/12 05:50 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Quote:
i wouldnt go with any of the stock replacement types at all. i would go for a W-series head i sure wish today that i had done that instead of putting money into something that has lots of limitations, and yes this comes from the idiot who is sinking even more money into trying to make more power with those edelbrocks by trowing money at the problem by putting a screw ontop of them.
stock replacement heads are fine if you dont have any intentions making big power in the future.
 It's actually cheaper to buy a head that has more future potential to it than to settle for something less because right now you only want X amount of power. All of you should know that once you have X amount you'll want more later so if you buy a head that has future potential you are bucks ahead.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Help with my new 340 build up
[Re: 1Fast340]
#1257765
06/27/12 07:49 PM
06/27/12 07:49 PM
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Joined: Jul 2009
Posts: 413
Norway (old world)
Oyvind Mopar
mopar
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mopar
Joined: Jul 2009
Posts: 413
Norway (old world)
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Quote:
i wouldnt go with any of the stock replacement types at all. i would go for a W-series head i sure wish today that i had done that instead of putting money into something that has lots of limitations, and yes this comes from the idiot who is sinking even more money into trying to make more power with those edelbrocks by trowing money at the problem by putting a screw ontop of them.
stock replacement heads are fine if you dont have any intentions making big power in the future.
Would you prefer W2 to the Eddys? I cannot see that Eddys are limiting when you "screw" them? 
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Re: Help with my new 340 build up
[Re: 67barrracuda]
#1257768
06/27/12 10:05 PM
06/27/12 10:05 PM
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Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
Guitar Jones
Paddle faster! I hear banjo music!
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Paddle faster! I hear banjo music!
Joined: Dec 2009
Posts: 20,640
in a cattle trailer down by th...
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Quote:
What do you think of this stroker kit?
http://www.ebay.com/itm/SCAT-SB-CHRYLSER...790&vxp=mtr
That's a 4.070 bore kit so you need an R block or a 340 block. Also is that a forged crank? If not I'd pass. Get a forged crank to start with and you won't have to buy another one later.
"Follow me the wise man said, but he walked behind"
'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
'74 W200 Crew Cab 360, NV4500, D44, D60 and NP205 divorced transfer case. Rear disc and hydroboost conversion.
2019 1500 Long Horn Crew Cab 4WD, 5.7 Hemi.
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Re: Help with my new 340 build up
[Re: Guitar Jones]
#1257769
06/27/12 10:09 PM
06/27/12 10:09 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
What do you think of this stroker kit?
http://www.ebay.com/itm/SCAT-SB-CHRYLSER...790&vxp=mtr
That's a 4.070 bore kit so you need an R block or a 340 block. Also is that a forged crank? If not I'd pass. Get a forged crank to start with and you won't have to buy another one later.
He does have a 340 block... I dont care for the I-
beam rods ... plus its still gonna need a balance
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Re: Help with my new 340 build up
[Re: MR_P_BODY]
#1257770
06/27/12 10:15 PM
06/27/12 10:15 PM
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Joined: Dec 2006
Posts: 3,395
Pa
Hot 340
master
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master
Joined: Dec 2006
Posts: 3,395
Pa
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Quote:
Quote:
Quote:
What do you think of this stroker kit?
http://www.ebay.com/itm/SCAT-SB-CHRYLSER...790&vxp=mtr
That's a 4.070 bore kit so you need an R block or a 340 block. Also is that a forged crank? If not I'd pass. Get a forged crank to start with and you won't have to buy another one later.
He does have a 340 block... I dont care for the I-
beam rods ... plus its still gonna need a balance
Scat I beams are decent rod for the money though. But those dont look like scat i beams in the picture.
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Re: Help with my new 340 build up
[Re: RobX4406]
#1257772
06/28/12 04:01 AM
06/28/12 04:01 AM
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Joined: Aug 2004
Posts: 2,128
sweden
sshemi
top fuel
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top fuel
Joined: Aug 2004
Posts: 2,128
sweden
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Quote:
Quote:
Id go with ebrocks because the rhs are really heavy
Brians heads will beat the ootb ede's for power pretty easily for roughly the same money as the ede's before correction. More than make up for any weight penalty. Budget sounds like a concern here.
i dissagree
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Re: Help with my new 340 build up
[Re: Oyvind Mopar]
#1257773
06/28/12 06:48 AM
06/28/12 06:48 AM
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Joined: Feb 2007
Posts: 2,578
sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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Quote:
Quote:
i wouldnt go with any of the stock replacement types at all. i would go for a W-series head i sure wish today that i had done that instead of putting money into something that has lots of limitations, and yes this comes from the idiot who is sinking even more money into trying to make more power with those edelbrocks by trowing money at the problem by putting a screw ontop of them.
stock replacement heads are fine if you dont have any intentions making big power in the future.
Would you prefer W2 to the Eddys? I cannot see that Eddys are limiting when you "screw" them?
yes i sure would prefer them,they are known to make very good power if done right:) the screw was sort of a bandaid to make up for the limitations of the heads, and W-2´s would have taken me much further before i would find the need for that screw.
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Re: Help with my new 340 build up
[Re: 1Fast340]
#1257774
06/28/12 11:36 AM
06/28/12 11:36 AM
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Joined: May 2004
Posts: 246
Jackson Michigan
67barrracuda
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 246
Jackson Michigan
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Thanks again, and I'll be looking to pick a lot of these parts at the Carlisle show next week. I still think the hardest decision is to which head to buy.
Jackson Michigan
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Re: Help with my new 340 build up
[Re: sshemi]
#1257775
06/28/12 01:40 PM
06/28/12 01:40 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
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Quote:
Quote:
Quote:
Id go with ebrocks because the rhs are really heavy
Brians heads will beat the ootb ede's for power pretty easily for roughly the same money as the ede's before correction. More than make up for any weight penalty. Budget sounds like a concern here.
i dissagree
Test an OOTB ede, not a corrected head with a better valve job, against Brian's RHS head and get back to us.
This guy is on a budget from his statements.
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Re: Help with my new 340 build up
[Re: sshemi]
#1257778
06/28/12 03:34 PM
06/28/12 03:34 PM
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Joined: Apr 2005
Posts: 12,271
Overpriced Housing Central
RobX4406
I Live Here
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I Live Here
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Quote:
Sure flow vise maybe but there are other benefits with ebrocks.
I have had ootb ebrocks and they have worked for me, needed no work.
I run rhs on my 408 now and im not very happy with them, they flow good but i needed to enlargEn the holes for one valvecover and for the headers and the intake fits like crap
I'm talking about Brian's heads, pull them out, slap them on and POWER produced compared to the OOTB ede's, not fit issues. What other suppliers heads do, not even a consideration, I was specific about the supplier. Not to mention component quality, springs, retainers, which gets lost in the shuffle in these deals.
If you have a pair of Brian's heads on your 408, swap those OOTB ede's on, then you'll be real disappointed in how it runs.
I did a bunch of clearancing on my ede's for pushrods. The crane roller rockers sure didn't fit with out clearancing either, so springs/retainers got swapped out. Just about every SB edelbrock air gap intake needs to be cut to fit stuff anymore. Fitting stuff up is just part of the game. Nothing is without warts. There are things about the rhs head that I'm not fond of too, none of my concerns about that are important when comparing to ede's.
Weight, 40 pounds... REALLY? This is the ONLY place the OOTB ede has an advantage for the OP's engine. How much HP does it take to overcome 40#? Like mentioned, I'll take the less expensive HP produced by the IMM RHS head over the 6-800 dollars in additional porting required on the ede's to get them in the same ball park. Most cars, especially street/strip cars, don't work well enough from a chassis standpoint to notice the weight difference. Maybe go on a diet to help out. 
I've never had a problem bolting up headers to the RHS X heads, tti, hookers (comp and SC), dougs, hedmans. I've never had to clearance a valve cover for a bolt hole either.
This post by the OP has BUDGET written all over it. Figure your all in price on both, especially a 450-500 hp engine which doesn't require anything fancy. You could get there with a set of J heads too...
Pick your parts, pay your money!
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Re: Help with my new 340 build up
[Re: RobX4406]
#1257779
06/28/12 03:49 PM
06/28/12 03:49 PM
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Joined: Jan 2003
Posts: 2,933
Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,933
Finalnd, Perkele
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I'm also building a (relatively) low buck 340. Have already the basic parts except the cam and the pistons. I intend to keep it simple, flat top pistons and either a solid flat tappet or roller cam with a single E85 carb. The heads are brand new (NOS?)closed chamber W2's bought from moparts forum that I will try to port, the crank is a stock 340 unit and the rods H-profile steelies. Mahle offers pistons, they have coatings & rings included and from what I've seen are good quality, light list pistons. They should provide CR between 11.5 -12_1 depending of the gaq between the head and block. Haven't thought much about the cam yet since still in early stages, the car will weigh around 2600 lbs with driver and the rest of the drivetrain is a doug nash maual and 8 3/4 with ladder bars.
Plynouth VIP '67 TT IC EFI
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Re: Help with my new 340 build up
[Re: RobX4406]
#1257780
06/28/12 03:58 PM
06/28/12 03:58 PM
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Joined: Dec 2006
Posts: 1,178
Indy
FlyFish
super stock
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super stock
Joined: Dec 2006
Posts: 1,178
Indy
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Quote:
...............Weight, 40 pounds... REALLY? This is the ONLY place the OOTB ede has an advantage for the OP's engine. How much HP does it take to overcome 40#? ......
If the 40 lbs was on the rear of the car, it would not be a big deal, just add power...but 40 lbs off the nose IS a big deal.
67 Barracuda street car, 408, e85, 1.38 60', 6.44 @105.9 in the 1/8 mile, 10.19 @130.5 in the 1/4...so far....
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Re: Help with my new 340 build up
[Re: RobX4406]
#1257781
06/28/12 04:11 PM
06/28/12 04:11 PM
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Joined: May 2004
Posts: 246
Jackson Michigan
67barrracuda
OP
enthusiast
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OP
enthusiast
Joined: May 2004
Posts: 246
Jackson Michigan
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Yes, this is a budget build and I wouldn't mind picking up a set of used heads.
Jackson Michigan
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Re: Help with my new 340 build up
[Re: FlyFish]
#1257784
06/28/12 04:52 PM
06/28/12 04:52 PM
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Joined: Aug 2006
Posts: 2,141
junction city oregon
viperblue72
top fuel
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top fuel
Joined: Aug 2006
Posts: 2,141
junction city oregon
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Quote:
Quote:
...............Weight, 40 pounds... REALLY? This is the ONLY place the OOTB ede has an advantage for the OP's engine. How much HP does it take to overcome 40#? ......
If the 40 lbs was on the rear of the car, it would not be a big deal, just add power...but 40 lbs off the nose IS a big deal.
What about higher compression ratio tolerance of an aluminum head? If the price is comparable why wouldn't you go with aluminum?
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Re: Help with my new 340 build up
[Re: Brian Hafliger]
#1257788
06/29/12 08:14 AM
06/29/12 08:14 AM
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Joined: Aug 2004
Posts: 2,128
sweden
sshemi
top fuel
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top fuel
Joined: Aug 2004
Posts: 2,128
sweden
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Quote:
Quote:
Brian, just out of curosity. What is th max flow you have got out of the RHS head and the Edelbrocks on your bench, both fully ported?
BTW, I lost 48 lbs going from fully ported J heads to fully ported Edelbrocks.
They will go 298cfm at .650 lift before backing up.
My vent 298 at 0,515 lift and then stalled. Ex had a nice curve all the way up.
This is with 2.055 & 1.625 valves.
But my intake doesnt match the ports because of poor fitment. Didnt have the time to get it machined.
It is a decent head with some issues and why the ..ll didnt they make them out of alu???
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