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Anyone ever have their 383 dyno'ed? Just trying to get a idea...

Just a Milodon 30930 pan, windage tray, and a HV pump.

62.1 psi at start of pull, 69.5psi at the end of pull.
 
As close to purple cam as we could get they don't make it any more. Half dome pistons. Used the original exhaust manifolds. Holley intake and Holley carb 650. Don't think we gained on horse power much. Wanted a good driver that sounded mean. Let us know how that motor turns out. Blue.
 
This one?
Click to expand...

Survey says......

9B56FA0B-6514-4CD3-A0D0-19BDB17B1F9C.png
 
PRHeads said:
It takes a pretty good combo to make 400hp from a stock stroke 383 with ex manifolds on it.

Any dyno sheets from your test you could post?
Click to expand...

Once upon a time I actually ran the SSH-25 (Racer Brown version of the 284/485) with manifolds on a 383. It was not good.
 
In a different incarnation of my bracket 383, I had it on the dyno with ex manifolds.
That combo used bowl blended 346/452 heads(one of each), rpm intake, 4779 carb, 9.7cr, custom solid cam for ex manifold use, and hp manifolds.
It made 419hp.
The cam ended up being a little too much duration, so tq was a little soft........ iirc around 410ft/lbs.
 
i think too many guys worry about HP numbers.A long time racer often said that his hi hp
builds never et'd well at the strip.
.. on the street low rpm torque is more important.
 
PRHeads said:
My bracket build went a best of 11.26@119 in my 3670lb race weight 68 Satellite.
Flat good, battery up front, electric w/p, mechanical fuel pump with the Oe 5/16” fuel line.
8” converter, 4.56’s, 9 x 30 radial slicks, cal tracs, open headers.
Typical ET’s around that time were low 11.40’s. 60’ times in the low/mid-1.50’s(best of 1.51).

Heads flowed in the low 230’s.
Click to expand...
My first serious 383 was somewhat similar in results, however it had more to the build.. 12.4 cr .585 comp, and warmed up 906s. I had speculated it to be in the 520-540 range.
Showed 11.40s at 118 , always ran at a lower than optimal track with a lower than optimal chassis. 67 charger 3500ish race weight.
 
PRHeads said:
My bracket build went a best of 11.26@119 in my 3670lb race weight 68 Satellite.
Flat good, battery up front, electric w/p, mechanical fuel pump with the Oe 5/16” fuel line.
8” converter, 4.56’s, 9 x 30 radial slicks, cal tracs, open headers.
Typical ET’s around that time were low 11.40’s. 60’ times in the low/mid-1.50’s(best of 1.51).

Heads flowed in the low 230’s.
Click to expand...
Was the 11.26 with the oxygenated fuel and carb spacer, do you know what the heads flowed through the mani, what pistons, comp and cam lift.
 
Diodedog said:
Was the 11.26 with the oxygenated fuel and carb spacer, do you know what the heads flowed through the mani, what pistons, comp and cam lift.
Click to expand...

Cam is .567/.582 gross lift on the card.
Isky rockers, never checked for actual ratio or measured lift at the valve, .024 lash.
A 1/2” spacer is all that would fit under the hood, non-oxygenated fuel mix(2 gals 110 to 5 gals pump 93), CR about 10.6:1.
TRW L2315’s, fly cut in the motor using the Isky tools.
Heads flowed mid-230’s with a radius plate...... never flowed with the intake on, but it would def be less.
 
PRHeads said:
Cam is .567/.582 gross lift on the card.
Isky rockers, never checked for actual ratio or measured lift at the valve, .024 lash.
A 1/2” spacer is all that would fit under the hood, non-oxygenated fuel mix(2 gals 110 to 5 gals pump 93), CR about 10.6:1.
TRW L2315’s, fly cut in the motor using the Isky tools.
Heads flowed mid-230’s with a radius plate...... never flowed with the intake on, but it would def be less.
Click to expand...
What size carb were you using?
 
Carb was a Holley 850 annular I had reworked in 1990.
Before there was any such thing as “HP” carbs, QFT, Demon, Proform bodies, and such.

I still have it...... still works great.
 
A YouTube channel called House Of Mopar has a 383 build and dyno results. Ported 440 Source heads, Bullet cam designed for manifolds. Ran with headers on a manually controlled dyno (Stuska maybe?) made 460 hp. He explains why they ran it with headers and a couple other glitches but it’s an interesting couple of videos.
 
I never dyno'd my old 383 in my 72 Dart but the car ran a best of 12.31 @110 and it was a pretty mild build.
It was a stock bottom end I rebuilt and I used the old MP .484 cam on a 104 centerline with all stock non adjustable rockers. Bolted the Eddy RPM intake on and a 750 Holley DP. Headers and 2.5" exh. Used a stock Mopar electronic dist I recurved and it had 3.91 gears in the 8-3/4. Trans was basically stock with a reverse manual valve body and a Turbo Action tight 3000 converter. The car weighed 3640 with my 180 in it. I never ran the numbers but my guess was it was making around 400 flywheel hp and maybe 325 at the wheels to run 12.30's @ 110. It actually ran pretty good for how mild it was as all my friends thought it would run mid 13's but when my first ever pass was 12.49 @ 109 on G-60 McCreary tires they changed their minds about it. Ron
 
383man said:
I never dyno'd my old 383 in my 72 Dart but the car ran a best of 12.31 @110 and it was a pretty mild build.
It was a stock bottom end I rebuilt and I used the old MP .484 cam on a 104 centerline with all stock non adjustable rockers. Bolted the Eddy RPM intake on and a 750 Holley DP. Headers and 2.5" exh. Used a stock Mopar electronic dist I recurved and it had 3.91 gears in the 8-3/4. Trans was basically stock with a reverse manual valve body and a Turbo Action tight 3000 converter. The car weighed 3640 with my 180 in it. I never ran the numbers but my guess was it was making around 400 flywheel hp and maybe 325 at the wheels to run 12.30's @ 110. It actually ran pretty good for how mild it was as all my friends thought it would run mid 13's but when my first ever pass was 12.49 @ 109 on G-60 McCreary tires they changed their minds about it. Ron
Click to expand...
Awesome ET! What heads were you running, and did you tweak them?
 
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