Big block stroker, please post your low rpm torque!

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

Going to be difficult to get correct numbers if they are chassis dyno numbers with a good converter. Not a whole lot of engine dyno runs are correctly logged from 2500 either.
Curious what shows up here though...

Greg I can't give you a dyno number but can give an et.
1) 512
2) Edelbrock Performer
3) 7.02 in the 1/8 shift at 5500 in a 4150lb car
4)better valve job and minor bowl clean up, 11.5 comp

9:1 493 RB

OOTB RPM with a good valve job

MP509 1.7 rockers

M1 single plane TBI

500 ft/lbs from 2000 on. 600ft/lbs @ 4000 peak.

Kevin

1 558 cui
2 Trick Flow 270
3 3500-4000-4500 rpm => 599-735-789 ft/lbs
4 Port matched to the intake and the 4.5 bore, 11,1 comp

A bit larger than asked for but>

1. 589ci.....
2. Indy -13 CNC365's
3. @3800-685ftlbs - 4000/706 - 720ftlbs@4400
4. 10:1CR

Indy 440-2/.625/.625" S/roller 260/270@.050, 110.....950HP carb.

I agree it will be tough. But hopefully there will be enough info for making choices to fit various budgets and goals.

Outside your parameters but our 655 made 960ft/lbs at 5500..

505, 10:1, RPM heads with valve job and bowl blend, original Torker, 850vs, 1-7/8” headers, small HFT cam.
Started pull at 3200........ 592ft/lbs.
Peak tq @4000....... 628ft/lbs.

Most of the stuff is run with an auto trans, and there isn’t much point in pulling the motor way down below what the converter would stall at........ so it’s pretty rare I’d pull one down to 3000 or lower.

498 rb stroker
Comp ratio is 10,5 and runs great with europe 95 octane pump gas
Edelbrock rpm slightly ported valve seat work from out of the box
Cam flat tapper hydralic dur @.050 242 246

On rear tires at 2800 rpm 650nm and 3900 rpm 714nm on a 4 speed trans.

Don't have low rpm numbers but 505 ci, OOTB Trick Flow 270 heads with 337 intake, 11.1:1 compression made peak 709 ft lbs at 4600 rpm.........

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

572"
15:1
-1 heads

749 @ 5400

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.


Mark

No idea on the torque, but 770hp works well enough to carry the front wheels on my little 512/400 from 440source!

1.31 60ft

https://www.youtube.com/watch?v=j7piYsuPYe8&t=54s

No dyno#s
512 ci, 4100lb 68 Charger , street car trim 3.54 gear 11.04 @ 123 so far.

https://www.buyracingparts.com/dyno-ehead496.html

I don't have the dyno sheets anymore, they went with the car, my first pump gas 511 C.I.400 block stroker motor with a set of 906 iron heads with 2.14 intake and 1.81 exhaust valves and mild porting, they flowed 266 CFM at .700 valve opening on a S/F 600 bench. It had 9.25 to 1 compression ration and low deck eddy six pack dual plane intake with 440 six pack carbs, it made over 400 Ft lb. at 2500 RPM and over 500 Ft' lb, at 3100 RPM and then went over 600 Ft lbs. from there until it made peak torque at 4500 RPM at 644 Ft. Lb. Peak HP was 612 HP at 5500 RPM but that stupid motpr would run faster shifting it at or above 7000 RPM .
I have notice on the pump gas motors I dyno tested, stock stroke or strokers, that had less than 10.5 to 1 compression that hey would make more torque than HP, once the compression goes above that they make more HP than torque
I'll look in the shop tomorrow morning and see if I can find some more recent dyno sheets

My Mega 496 has 12.5 compression, I know a little steep. But w/Bullet custom hydraulic cam & Performer RPM heads, dual plane Performer RPM intake & only a 750dbl pumper made 581hp @ 5400 624tq @ 4300
Sorry cheated, used this on 2 posts
Ken

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.

4.15 stroke 496.
Edelbrock RPM heads ported to 309 cfm @ .600" lift
10.3:1 compression
612 lb-ft @ 3,300 rpm
640 lb-ft @ 4,000 rpm
640 hp @ 5,900 rpm

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.

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

That's more like it. J.Rob

Had a couple of those now......Turn up the volume, you will love the sound of this little 484 Hemi...

https://www.youtube.com/watch?v=mrm62S2Fmow

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

You have a very good running combo at that weight. Ron

Thanks Ron, your car aint no slouch , awesome car !!!

[quote=csk]Thanks Ron, your car aint no slouch , awesome car !!! [/quote


Thank you. Ron

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

I was asked through “messenger” to post my dyno sheet. Here it is.

👍

Here's my 496" Hemi. Stage V Heads. Runs on Pump 91 non-ethanol. Around 10:1.