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Old 11-27-2010, 05:35 PM   #1
echerbst
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Default 434 sbc on the street

I have a 434 sbc that was in my race car and have had the engine sitting for a year and am tired of looking at it. It is a pump gas engine tht made 680hp on motor with a pretty stout nitrous cam, .704 lift, 276/280 duration at .50, 106+4 lsa. I was wondering if I put a smaller cam in it how much power could I expect. Was going to put a t56 behind it. Anybody who has run one on the street with any input is appreciated.
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Old 11-27-2010, 06:00 PM   #2
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Default Re: 434 sbc on the street

Block: GM#3951509 2-bolt block machined to 4-bolt splayed mains, .030 over align bored & honed
Crank: Scat forged 4 stroke, internally balanced
Rods: Eagle 6 H-Beam
Pistons: J&E SRP #271067 -16cc dish, 349 grams
Ring Set: J&E SRP #JG31F8-4155-3
Heads: Brodix Track 1s, 72cc chamber, 227cc Intake port, Valves I 2.08/E 1.60, fully ported & flowed
Intake flows 316cfm @ .600 & Exhaust 219cfm @ .600
Deck Height: .006
Head Gasket: Fel-Pro #1004, bore 4.190, compressed thickness 0.041", compressed volume 9.200cc
Compression Ratio: 10.03:1
Cam: Howards small base circle, advanced 2 degrees
Mechanical Roller specs:
Intake CL @ .050" 102.5
Lobe Center: 108
Lobe lift Intake: .398 Lobe lift Exhaust: .408
Duration @ .050 lift: I:253 / E:268
Duration @ .020 lift: I:286 / E:304
Rocker Arms: Crane aluminum 1.6 full rollers on 7/16 studs with stud girdle
Valve lash is .024
Intake Manifold: Edelbrock Victor Jr. fully ported & flowed, avg. 300cfm per port
Carburetor: ProSystem 1000HP
Fuel line is feeding a 110gph mech. fuel pump
HEI Distributor: Timing is 36 degrees total
Spark Plugs: NGK #2756
MSD-6AL
Headers: Hooker Super Comp 1-7/8
Crank Pulley: March under drive
I foot brake it at 2000rpm @ the line & shift it a 6000rpm
Converter is a 3000 stall
I have all Calvert Racing suspension, CalTracs, split mono rear springs, Rancho 9-way adjustable rear drag shocks & 90-10 front drag shocks
Transmission: TH-350 completely rebuilt with a full forward pattern
Axle: GM 12-bolt, with Moser 33 spline axles, 3.42 gear on a Moser spool & C-Clip eliminators
Wheels: Weld Pro Star 15x3 up front & 15x8 rear with 26x10.5x15 M&H Racemaster cheater slicks
Griffin radiator 700hp rated aluminum with electric fan
I run 91 pump gas
Car weighs about 3200lbs. with me in it

This combo went 10.797 @ 123.84 mph & I drove it to the track.
Going to a new 427 sbc this winter with 200 more h.p. & trailered only.
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Old 11-27-2010, 06:03 PM   #3
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Default Re: 434 sbc on the street

I have a 434 sbc with 13:1 comp, .680 lift shaft, I retard the timing to about 30 on the street, it has a th400. This winter I'm putting in a gearvendors overdrive unit.


Went 10.42@128. 3100lbs with me in it

Last edited by blubu68; 11-27-2010 at 06:05 PM.
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Old 11-27-2010, 06:54 PM   #4
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Default Re: 434 sbc on the street

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Originally Posted by blubu68 View Post
I have a 434 sbc with 13:1 comp, .680 lift shaft, I retard the timing to about 30 on the street, it has a th400. This winter I'm putting in a gearvendors overdrive unit.


Went 10.42@128. 3100lbs with me in it
I wonder what the rest of your setup looks like? Because I have a 434 with 13.5.680,660. My car with me in it is a little over 3300# with a glide and 4:10's it has gone 10.63@129. I think we are very similar.
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Old 11-27-2010, 07:01 PM   #5
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Default Re: 434 sbc on the street

Quote:
Originally Posted by 69camaro434 View Post
Block: GM#3951509 2-bolt block machined to 4-bolt splayed mains, .030 over align bored & honed
Crank: Scat forged 4 stroke, internally balanced
Rods: Eagle 6 H-Beam
Pistons: J&E SRP #271067 -16cc dish, 349 grams
Ring Set: J&E SRP #JG31F8-4155-3
Heads: Brodix Track 1s, 72cc chamber, 227cc Intake port, Valves I 2.08/E 1.60, fully ported & flowed
Intake flows 316cfm @ .600 & Exhaust 219cfm @ .600
Deck Height: .006
Head Gasket: Fel-Pro #1004, bore 4.190, compressed thickness 0.041", compressed volume 9.200cc
Compression Ratio: 10.03:1
Cam: Howards small base circle, advanced 2 degrees
Mechanical Roller specs:
Intake CL @ .050" 102.5
Lobe Center: 108
Lobe lift Intake: .398 Lobe lift Exhaust: .408
Duration @ .050 lift: I:253 / E:268
Duration @ .020 lift: I:286 / E:304
Rocker Arms: Crane aluminum 1.6 full rollers on 7/16 studs with stud girdle
Valve lash is .024
Intake Manifold: Edelbrock Victor Jr. fully ported & flowed, avg. 300cfm per port
Carburetor: ProSystem 1000HP
Fuel line is feeding a 110gph mech. fuel pump
HEI Distributor: Timing is 36 degrees total
Spark Plugs: NGK #2756
MSD-6AL
Headers: Hooker Super Comp 1-7/8
Crank Pulley: March under drive
I foot brake it at 2000rpm @ the line & shift it a 6000rpm
Converter is a 3000 stall
I have all Calvert Racing suspension, CalTracs, split mono rear springs, Rancho 9-way adjustable rear drag shocks & 90-10 front drag shocks
Transmission: TH-350 completely rebuilt with a full forward pattern
Axle: GM 12-bolt, with Moser 33 spline axles, 3.42 gear on a Moser spool & C-Clip eliminators
Wheels: Weld Pro Star 15x3 up front & 15x8 rear with 26x10.5x15 M&H Racemaster cheater slicks
Griffin radiator 700hp rated aluminum with electric fan
I run 91 pump gas
Car weighs about 3200lbs. with me in it

This combo went 10.797 @ 123.84 mph & I drove it to the track.
Going to a new 427 sbc this winter with 200 more h.p. & trailered only.
Did you pick out these pistons and cam. I am going to change my 434 to pump gas and would like to make it 11:1, I think I should be able to get away with using pump gas at this compression. I was thinking about calling either bullet or lsm for a cam. My heads are brodix 11x they flow 323@700.
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Old 11-27-2010, 07:03 PM   #6
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Default Re: 434 sbc on the street

Quote:
Originally Posted by 69camaro434 View Post
Block: GM#3951509 2-bolt block machined to 4-bolt splayed mains, .030 over align bored & honed
Crank: Scat forged 4 stroke, internally balanced
Rods: Eagle 6 H-Beam
Pistons: J&E SRP #271067 -16cc dish, 349 grams
Ring Set: J&E SRP #JG31F8-4155-3
Heads: Brodix Track 1s, 72cc chamber, 227cc Intake port, Valves I 2.08/E 1.60, fully ported & flowed
Intake flows 316cfm @ .600 & Exhaust 219cfm @ .600
Deck Height: .006
Head Gasket: Fel-Pro #1004, bore 4.190, compressed thickness 0.041", compressed volume 9.200cc
Compression Ratio: 10.03:1
Cam: Howards small base circle, advanced 2 degrees
Mechanical Roller specs:
Intake CL @ .050" 102.5
Lobe Center: 108
Lobe lift Intake: .398 Lobe lift Exhaust: .408
Duration @ .050 lift: I:253 / E:268
Duration @ .020 lift: I:286 / E:304
Rocker Arms: Crane aluminum 1.6 full rollers on 7/16 studs with stud girdle
Valve lash is .024
Intake Manifold: Edelbrock Victor Jr. fully ported & flowed, avg. 300cfm per port
Carburetor: ProSystem 1000HP
Fuel line is feeding a 110gph mech. fuel pump
HEI Distributor: Timing is 36 degrees total
Spark Plugs: NGK #2756
MSD-6AL
Headers: Hooker Super Comp 1-7/8
Crank Pulley: March under drive
I foot brake it at 2000rpm @ the line & shift it a 6000rpm
Converter is a 3000 stall
I have all Calvert Racing suspension, CalTracs, split mono rear springs, Rancho 9-way adjustable rear drag shocks & 90-10 front drag shocks
Transmission: TH-350 completely rebuilt with a full forward pattern
Axle: GM 12-bolt, with Moser 33 spline axles, 3.42 gear on a Moser spool & C-Clip eliminators
Wheels: Weld Pro Star 15x3 up front & 15x8 rear with 26x10.5x15 M&H Racemaster cheater slicks
Griffin radiator 700hp rated aluminum with electric fan
I run 91 pump gas
Car weighs about 3200lbs. with me in it

This combo went 10.797 @ 123.84 mph & I drove it to the track.
Going to a new 427 sbc this winter with 200 more h.p. & trailered only.
I just looked at you chamber size and they are 72cc. Mine are 69cc I wonder how much it would bump up the comp ratio.
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Old 11-27-2010, 07:18 PM   #7
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Default Re: 434 sbc on the street

13:1 434's going mid 10's...I'm being honest, not being a dick, but I certainly wouldn't brag about that, it's really far off the mark..

To the OP, why do you need a smaller cam to street drive? What are the rest of the cam specs?...That's a stout piece to make 680 on pump gas, was it on a "fair" dyno?
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Old 11-27-2010, 07:32 PM   #8
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Default Re: 434 sbc on the street

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Originally Posted by SmallBlockNova View Post
13:1 434's going mid 10's...I'm being honest, not being a dick, but I certainly wouldn't brag about that, it's really far off the mark..

To the OP, why do you need a smaller cam to street drive? What are the rest of the cam specs?...That's a stout piece to make 680 on pump gas, was it on a "fair" dyno?
From your statement I take it I am one of the guys you are talking about and I was not bragging merely stating a fact. It is obvious that mid-tens for these motors are not fast,something is def wrong. Thanks for your input.BTW you were being a little bit of a dick, not sure if thats what you wanted to do.
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Old 11-27-2010, 07:40 PM   #9
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Default Re: 434 sbc on the street

I don't think that he was intentionally being a dick. Alot of us lack his chassis tuning abilities. I know me personally, I just put more engine to it, when I never got the stuff I had to run what it should have.
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Old 11-27-2010, 07:53 PM   #10
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Default Re: 434 sbc on the street

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From your statement I take it I am one of the guys you are talking about and I was not bragging merely stating a fact. It is obvious that mid-tens for these motors are not fast,something is def wrong. Thanks for your input.BTW you were being a little bit of a dick, not sure if thats what you wanted to do.
What I'm saying is...There may be something wrong
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Old 11-27-2010, 07:53 PM   #11
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Default Re: 434 sbc on the street

Quote:
Originally Posted by echerbst View Post
I have a 434 sbc that was in my race car and have had the engine sitting for a year and am tired of looking at it. It is a pump gas engine tht made 680hp on motor with a pretty stout nitrous cam, .704 lift, 276/280 duration at .50, 106+4 lsa. I was wondering if I put a smaller cam in it how much power could I expect. Was going to put a t56 behind it. Anybody who has run one on the street with any input is appreciated.
Unless you're looking to increase valve spring life, I personally wouldn't touch that motor. 680 hp out of a pump gas friendly 434 is pretty strong, provided that the dyno is accurate. I've got a 10.6:1 434 in my 4000 lb. truck that runs 7.20s-7.30s n/a in the 1/8 with a n2o-friendly cam and I'm satisfied with it's performance and street manners. I'd be a little more worried about that t56 living behind it.

I say put that thing in your street car and go have some fun with it!!
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Old 11-27-2010, 08:44 PM   #12
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Default Re: 434 sbc on the street

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What I'm saying is...There may be something wrong
I agree with you 100%. I also know that if I put a th400 in it, 4:56, and a converter that stalls 5k its going to run better, however don't know if its going to run its full potential. Right now its stalling at 3k and I am racing at lebanon valley, which I might as well race at colorado.
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Old 11-27-2010, 09:39 PM   #13
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Default Re: 434 sbc on the street

Thanks for all the input guys, no doubt this is a stout motor, previous setup in a 95 mustang went 10.0's on motor and 9.0's on a 250 fogger. That was with a smaller less nitorus friendly cam. Issue is that my days of driving a car with a huge converter and gears around are done. I have built and had enough race cars. I want to have power brakes and steering so if I do gonna need a smaller cam. Prolly gonna go efi too and ditch the dominator too.

Anybody ever run a holley stealth ram or edlebrock pro flo intakes on a large cubic inch small block.
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Old 11-27-2010, 10:44 PM   #14
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Default Re: 434 sbc on the street

I have a 10.5:1 430 sbc in my Camaro, .600 lift HR cam, it is slow compared to others, running low 11's N/A. Has 4.10 spooled 9 inch and just installed a TH400. Can't wait to get back to drive it again
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Old 11-28-2010, 11:26 AM   #15
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Default Re: 434 sbc on the street

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I am racing at lebanon valley, which I might as well race at colorado.
Why's that? I've been at Island and my buddy's at LVD and the weather according to our stations have been extremely close.

Last edited by Hotrod 36; 11-28-2010 at 11:30 AM.
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