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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664438
08/27/14 06:32 PM
08/27/14 06:32 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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Depending on the weight of the car but sounds like you would want more RPM out of it but the duration is a bit short... if foot braking it should be fine.. has nice torque and HP for the cubes 
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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664442
08/28/14 12:22 AM
08/28/14 12:22 AM
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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:
Cam is cut at 108, heads flow 348 intake and 247 exhaust
Intake port volume at 270 + , just wondering if it will be a nice bracket motor in a Scamp, motor is brand spankin new !!
Should be... those are not max ported heads by any means
but should work well with the combo
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Re: opinion on 340 R3/w8 (358ci)
[Re: MR_P_BODY]
#1664444
08/28/14 12:43 AM
08/28/14 12:43 AM
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Joined: Jan 2003
Posts: 549
CT
340KID
OP
mopar
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OP
mopar
Joined: Jan 2003
Posts: 549
CT
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Our goal is to be a low 10 second car, the project is a 73 scamp with a 71 full fiberglass front clip, hood, fenders, bumber, it has a 8 pt cage, interior seats front/rear removed. 727 tranny with 9" dynamic 4500+ converter, 8.75 rear with 742 case, 5.13 rear (I think) with spool and 29.5 x10.5 slicks , don't know weight but I'm thinking around 2900-3000 ?? Learning more about it every day, lol
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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664445
08/28/14 12:47 AM
08/28/14 12:47 AM
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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:
My biggest concern would be headers and dry pump location, does anyone make W8 2" headers or bigger that will work with a stock K-frame, motor already has dry pump, pulleys etc just need reservoir, pump is located just under number 1 cylinder
Your on your own with headers... also 1 7/8 should be
large enough for that
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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664446
08/28/14 01:02 AM
08/28/14 01:02 AM
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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:
Our goal is to be a low 10 second car, the project is a 73 scamp with a 71 full fiberglass front clip, hood, fenders, bumber, it has a 8 pt cage, interior seats front/rear removed. 727 tranny with 9" dynamic 4500+ converter, 8.75 rear with 742 case, 5.13 rear (I think) with spool and 29.5 x10.5 slicks , don't know weight but I'm thinking around 2900-3000 ?? Learning more about it every day, lol
You need more conv.. stall should be just above the
max torque rpm.. check the formula for the gear..
5.13 might be a bit much(4.88 would be more like it)
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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664447
08/28/14 01:02 AM
08/28/14 01:02 AM
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Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
tubtar
master
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master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
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Quote:
does anyone make W8 2" headers or bigger that will work with a stock K-frame
Yeah.
Here are your choices.
Get ready to shell out a couple thousand to have a quality set made......I doubt 2 " will work , but I'm certainly not the last word on this.
Or get an A body set either semi welded and add your own flanges or completed and cut their flanges off.
SPD has the flanges and there are a couple different W-8 versions that I am aware of so make sure you get the right ones to start with.
http://spdexhaust.com/
For my deal , I went through SPD for the flanges and got a set of un-welded later A body 1 7/8" headers from Stahl.
Then married the two up for my '65.
Stahl does not make headers anymore , but they may still have some inventory laying around , so I would call them and see.
It took some of the guess work out of it for me.
But I have an AlterKtion in there and it was still a fair bit of work.
Shelf stuff is very rare for these deals.
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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664449
08/28/14 04:15 AM
08/28/14 04:15 AM
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Joined: Feb 2009
Posts: 1,019
Finland
mafo
super stock
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super stock
Joined: Feb 2009
Posts: 1,019
Finland
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If you have the stock steering box, you probably run into trouble with the oil pump, but it will be worth the effort to get it in 
-65 Valiant,420", all motor,2700#, dot tires, 8,42 @ 160,2
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Re: opinion on 340 R3/w8 (358ci)
[Re: mafo]
#1664450
08/28/14 07:52 AM
08/28/14 07:52 AM
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Joined: Apr 2003
Posts: 1,627
anywhere@ anytime
actionange
top fuel
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top fuel
Joined: Apr 2003
Posts: 1,627
anywhere@ anytime
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Using the KISS philosophy- "keep it simple stupid" (no disrespect towards you)- a bracket car should be just that. With dry sump and custom headers it might not be. That power plant will definitely get you to 10 flat with that car weight. In fact you might have to slow it down... Use non exotic parts that are readily available and can be found/ fixed/ tuned easily for success. Just my  See ya at the track.
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Re: opinion on 340 R3/w8 (358ci)
[Re: actionange]
#1664451
08/28/14 08:53 AM
08/28/14 08:53 AM
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Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
Leon441
master
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master
Joined: Nov 2004
Posts: 4,330
Lynchburg, VA
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The exhaust ports are higher and a different pattern than W2. You may be able to cut flanges and replace with W9. 1 7/8" is fine for 358.
If you are capable of doing the drysump,fine. If not it is possible to convert to internal pump. This depending on the rear cap you may have to swap and re line bore which is costly. Another option is a wet pan with a single stage external pump. With stock k member and steering box it will be very difficult to use the dry sump.
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: opinion on 340 R3/w8 (358ci)
[Re: 340KID]
#1664452
08/28/14 11:55 PM
08/28/14 11:55 PM
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Joined: Jun 2010
Posts: 89
Woodbury, CT.
mcduff
member
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member
Joined: Jun 2010
Posts: 89
Woodbury, CT.
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Good Info & advise above......... Nice combo, plenty of HP & Torque to put you in the 10.0, upper 9s bracket range. Weight will be in the 3050 - 3100lb range + driver. Like Actionange said keep it simple. You want low maintenance and consistancy with any choice you make for a bracket motor...from what I have seen...W8s and their high RPM operating requirements tend to be on the more expensive side to maintain. I would recommend that you give Ryan Johnson at Shady Dell a call...One of the best guys out there when it comes to SB Mopars.
Brett Miller 447 W9
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Re: opinion on 340 R3/w8 (358ci)
[Re: mcduff]
#1664453
08/29/14 01:30 AM
08/29/14 01:30 AM
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Joined: Feb 2011
Posts: 159
australia
charger410
member
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member
Joined: Feb 2011
Posts: 159
australia
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It will fit with the Dry sump pump but it'll be murder
Peter. Australian Charger, alloy block injected 410in, w9 na 9.03@148 leafs 3000lb
1967 barracuda 605 hemi Stage5 millennium 8.2@170
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Re: opinion on 340 R3/w8 (358ci)
[Re: charger410]
#1664455
08/29/14 01:42 AM
08/29/14 01:42 AM
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Joined: Feb 2011
Posts: 159
australia
charger410
member
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member
Joined: Feb 2011
Posts: 159
australia
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Your headers will be the hardest part with the Factory K member and torsion bars
Peter. Australian Charger, alloy block injected 410in, w9 na 9.03@148 leafs 3000lb
1967 barracuda 605 hemi Stage5 millennium 8.2@170
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