I found some of the original sheets from my first dyno session on the 511 C.I. 400 stroker motor with the 906 iron heads and some from my current 400 block 517.2 C.I. E85 bracket motor. The pump gas motor made 550Ft lbs. at 3000 RPM, peak torque at 4200,4300 and 4500 RPM of 633 Ft lbs testing air cleaners, peak HP was at 5500 and 5600 RPM with 605 HP. My current bracket motor has a set of ported 440-1 heads with a set of Jesel 1.55 paired shaft rockers, Ultra dyne solid roller and a Indy 400-3 Intake with a A.J. Casselini converted Holley Dominator Compression ratio varies from 14.72 to 15.03 to 1. I had issues with the Mopar bonze oil pump drive having the gear on crooked on the shaft or something causing it to make the distributor housing wobble making the timing goofy We set the timing and made three pulls before I saw the problem with the distributor moving That motor made 591.5 Ft lbs at 3900 RPM with416. HP, it made peak torque on that pull at 5800 RPM making 673.7 Ft. Lbs., peak 767. HP was at 6200 RPM , torque was still 649.7 FT lbs. at that RPM. IHTHs.
Last edited by Cab_Burge; 04/21/2007:00 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Big block stroker, please post your low rpm torque!
[Re: gregsdart]
#2767069 04/22/2011:51 AM04/22/2011:51 AM
Not trying to jump ship here but what about 4.15 x 4.31 Hemi with stock heads? I see from some of the combos above, those heads flow more than stock Hemi heads so would those engines be compatible in torque numbers? Impressive engine numbers for all posted so far.
Re: Big block stroker, please post your low rpm torque!
[Re: cudaman1969]
#2767215 04/22/2008:20 PM04/22/2008:20 PM
440 base 496 ci 10.7;to 1 edelbrock 300 cfm flat tappet cam 654 hp @ 5600 rpm 653 Tq @4400 3600 lbs Dart runs 10.4 in the 1/4 mile Scot Brown built buyracingparts.com
Last edited by caper; 04/22/2008:20 PM.
New best 10.18 , 1.40 60 ft 496 Scott Brown built, street driven 3600 lbs,654 hp , 653 ft tq
Re: Big block stroker, please post your low rpm torque!
[Re: caper]
#2767349 04/23/2010:12 AM04/23/2010:12 AM
Not trying to jump ship here but what about 4.15 x 4.31 Hemi with stock heads? I see from some of the combos above, those heads flow more than stock Hemi heads so would those engines be compatible in torque numbers? Impressive engine numbers for all posted so far.
Had a couple of those now......Turn up the volume, you will love the sound of this little 484 Hemi...
My 493 with a 440Source 4.15 stroker kit Indy EZ heads 10.6 comp Good quench as I drive and race it on 92 pump Never dyno'd but has run a best of 10.76 @ 125 in my 63 Sport Fury that's 3700 lbs without me. Ron
616fwhp
Thanks as I figured its only about 600 at the flywheel and maybe 525 at the wheels on the calculator I used. But I would rather your figures be right. Ron
Re: Big block stroker, please post your low rpm torque!
[Re: CSK]
#2767698 04/23/2011:50 PM04/23/2011:50 PM
Not trying to jump ship here but what about 4.15 x 4.31 Hemi with stock heads? I see from some of the combos above, those heads flow more than stock Hemi heads so would those engines be compatible in torque numbers? Impressive engine numbers for all posted so far.
My HEMI is 4.36 x 4.5 (540 ci). Strictly a street engine on pump 93. 10.3 compression, MP aluminum heads with bowl work. Mopar “Marine” dual plane intake, 248/254 @ .050 solid roller with .580 net lift.
It made 500. Ft Lb @ 3,000 rpm, 680 ft. Lb @ 4,500 rpm and 677 HP @ 5,800
Re: Big block stroker, please post your low rpm torque!
[Re: 1974 474 Duster]
#2769213 04/28/2006:33 PM04/28/2006:33 PM
To learn a bit more about head choices for 493 to 540 STREET strokers, please post 1cubic inch 2head used 3Dyno torque down low, preferably from 2500 to 4000? 4work done on heads, compression ratio
I see the big inch engines posted so here is one a little smaller .
470 cu Edelbrock RPM heads . Port matched to RPM intake some minor port work and a comp valve job. 10.72 to one good quench.
We set the timing and made three pulls before I saw the problem with the distributor moving 
Ron
