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434 W9 Small Block
#1128866
12/06/11 04:26 PM
12/06/11 04:26 PM
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Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar
OP
pro stock
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OP
pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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I think I'm going to put together a 434" SBM and I wanted you guys to chime in. 4.155" bore R3 4.00" stroke 6.200" rod W9 Heads (P5007065AB) W9 Intake (P4876162) Cam & Compression can be anything but I'm looking to make around 700hp Thoughts? 
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Re: 434 W9 Small Block
[Re: Biginchmopar]
#1128871
12/06/11 05:29 PM
12/06/11 05:29 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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Why not go 4.25 stroke while your in there?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 434 W9 Small Block
[Re: HotRodDave]
#1128872
12/06/11 05:45 PM
12/06/11 05:45 PM
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Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar
OP
pro stock
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OP
pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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71 Demon = Body 4.00" stroke is enough The car will be setup to race and then drive it on the street once in a while. Fuel = gas 104 or better 
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Re: 434 W9 Small Block
[Re: Biginchmopar]
#1128873
12/06/11 06:20 PM
12/06/11 06:20 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:
71 Demon = Body
4.00" stroke is enough
The car will be setup to race and then drive it on the street once in a while.
Fuel = gas 104 or better
Why is 4.00 enough? Tall deck judging by the manifold..Why not lay the stroke to it, you have the head for it.
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Re: 434 W9 Small Block
[Re: Hot 340]
#1128874
12/06/11 07:43 PM
12/06/11 07:43 PM
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Joined: Mar 2010
Posts: 601
Niles, Michigan
Hitman340
mopar
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mopar
Joined: Mar 2010
Posts: 601
Niles, Michigan
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Quote:
Quote:
71 Demon = Body
4.00" stroke is enough
The car will be setup to race and then drive it on the street once in a while.
Fuel = gas 104 or better
Why is 4.00 enough? Tall deck judging by the manifold..Why not lay the stroke to it, you have the head for it.
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Re: 434 W9 Small Block
[Re: Biginchmopar]
#1128875
12/06/11 07:52 PM
12/06/11 07:52 PM
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Joined: Oct 2010
Posts: 2,407
Ambridge, Pa.
rickraw
top fuel
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top fuel
Joined: Oct 2010
Posts: 2,407
Ambridge, Pa.
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440sb, 4.185 bore, 4" stroke, 11-1, w9's by ryan j, .730 roller, m1 intake, prosystems 1050 dom, 904/w brake, ford 9"/456. 71 demon, 9.61@137.91. mainly street, some strip time. want to know anything more ask. stay safe, seeya.
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Re: 434 W9 Small Block
[Re: Hitman340]
#1128876
12/06/11 07:54 PM
12/06/11 07:54 PM
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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 only thing stroke is good for is moving your power range around. The more stroke the more you lower your RPM range.
However bore is more beneficial for making HP. If the bore is small such as 4.100 with a W9 head you sacrifice head flow from shrouding the valve. 4.155" will work but I would go bigger.
Leon
Career best 8.02 @ 169 at 3050# and 10" tires small block power.
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Re: 434 W9 Small Block
[Re: Leon441]
#1128877
12/06/11 08:28 PM
12/06/11 08:28 PM
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Joined: Apr 2007
Posts: 2,026
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,026
Trumbull,CT.
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Quote:
The only thing stroke is good for is moving your power range around. The more stroke the more you lower your RPM range.
However bore is more beneficial for making HP. If the bore is small such as 4.100 with a W9 head you sacrifice head flow from shrouding the valve. 4.155" will work but I would go bigger.
Leon
This^^^^^^^
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Re: 434 W9 Small Block
[Re: Leon441]
#1128878
12/06/11 08:31 PM
12/06/11 08:31 PM
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Joined: Oct 2008
Posts: 458
Michigan
BPE
mopar
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mopar
Joined: Oct 2008
Posts: 458
Michigan
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Quote:
The only thing stroke is good for is moving your power range around. The more stroke the more you lower your RPM range.
However bore is more beneficial for making HP. If the bore is small such as 4.100 with a W9 head you sacrifice head flow from shrouding the valve. 4.155" will work but I would go bigger.
Leon
And how hard did you turn your 441 with the 4.125" crank? 
Rod
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Re: 434 W9 Small Block
[Re: jim sciortino]
#1128879
12/06/11 08:33 PM
12/06/11 08:33 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:
The only thing stroke is good for is moving your power range around. The more stroke the more you lower your RPM range.
However bore is more beneficial for making HP. If the bore is small such as 4.100 with a W9 head you sacrifice head flow from shrouding the valve. 4.155" will work but I would go bigger.
Leon
This^^^^^^^
but the stroke will help with valvetrain longevity for street duty. x3 on the bigger bore. smallblocks have been small for decades. pull out all the stops.
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Re: 434 W9 Small Block
[Re: Leon441]
#1128881
12/06/11 09:16 PM
12/06/11 09:16 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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That engine had a very good head on it. The block was not an R3 and could only safely go 4.125" bore. It's not like I ordered a 4.125" stroke crank. I bought it from the original purchaser and didn't know any better. That engine was built to run with nitrous. The crank was also a Custom Billet LA Enterprises Kryptonite crank. And yes I used the crank with the next build a 457 that later was a 468. From that experience I learned boring from 4.200" to 4.245" was a really big improvement. This crank caused nightmares running a torqueflite as it made too much torque with nitrous. With the powerglide it was much better. My point with the post was not to bash stroke. If you run two identicle displacement engines one with a displacement made up with a long stroke the other with a large bore, the short stroke large bore is going to run better. This is especially true when running a head designed around large bores. Some argue the trucks only ran up to 4.185" so that is what one should run. That deal was due to a bore limit rule. The best deal is to have all the bore the block will go and as long a stroke as possible to facilitate a piston and rod combo that you need. But, a lot of classes are displacement limited. Thought where the poster was wanting to build a 439 he should try and do it with a larger bore. Just my opinion. Leon
I really think I lack in power due to
the small bore I run... when I need a freshening I
going to go with a much bigger bore to unshroud
my intakes
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Re: 434 W9 Small Block
[Re: Hot 340]
#1128883
12/06/11 09:51 PM
12/06/11 09:51 PM
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Joined: Apr 2007
Posts: 2,026
Trumbull,CT.
jim sciortino
top fuel
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top fuel
Joined: Apr 2007
Posts: 2,026
Trumbull,CT.
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Quote:
Quote:
Quote:
The only thing stroke is good for is moving your power range around. The more stroke the more you lower your RPM range.
However bore is more beneficial for making HP. If the bore is small such as 4.100 with a W9 head you sacrifice head flow from shrouding the valve. 4.155" will work but I would go bigger.
Leon
This^^^^^^^
but the stroke will help with valvetrain longevity for street duty. x3 on the bigger bore. smallblocks have been small for decades. pull out all the stops.
If it was mine, I'd do a 4.220 x 4.00 447ci.
Best of both worlds.
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Re: 434 W9 Small Block
[Re: fishy340]
#1128885
12/07/11 02:02 PM
12/07/11 02:02 PM
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Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,419
Kalispell Mt.
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I agree, run all the bore you can for the most HP then run all the stroke you can to get the RPM down to a more valve spring friendly RPM. If you are cube limited then run the biggest bore allowed then stroke it to take advantage of the displacement allowed. Do you really think the NASCAR or Indy or Formula 1 guys would not run a longer stroke if they were allowed? No. They all do just like I said, run the biggest bore they can then strok it to the displacement limit. How many NASCAR guys are out there only running 330 inches because they don't need the extra stroke?
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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