Customer supplied Holley 750
RPM port matched by Peyton Hunt
CNC’d Gen I Edelbrocks (Peyton)
10.6:1 Mahle piston
Eagle 6.125 rod
My stroker crank
Hyd Roller, .580 lift
Progression Ign Dist, FAST coil
93 pump

506hp/540tq

 

 

Ummmmm, done at 5300? What in tarnation? MORE CARB!
500 is nice, though. What cubes?

 

428. Cam is in kinda early, and I think it just ran outta air.
BUT, starting off at over 500tq outta make it a fun ride!! Going in a ‘79 TA in place of the original 403.

 

Finally dropping off my block to the builder next week for a similar build. I believe he's actually doing two stroker SBO's at the same time.

I'd be happy with those numbers.

 

Great build. What duration range is that cam in? Huge torque, I would say Peyton's heads aren't too big for 428 ci, over 500 ft-lbs from 3000 RPMs. That means tire annihilation and has 500 HP at loafing rpm. I really should have had Mark build me one, great job as always.

 

Who’s your builder?

 

Very Nice ! Love it

 

Block? Bore? Sroke?

 

Nice build Mark. This is similar to what I may upgrade the 374 in my 70 Supreme to in the near future. Question - how do you think this same build with the new SBO heads would compare? About the same or less or more?

-Joe

 

It’s been stated a hundred times on here, but here it is again;
Gas block
4.125 bore
4.00” stroke

 

Thanks. Here’s what I can tell you. I did virtually the same build with out of the box GEN III BB Edelbrock’s, and they made a little less torque, about 10 pounds, but about 8 to 10 more horsepower, and a broader range.
Small block head would probably make a little more torque like this, and maybe about the same horsepower as the bigger head. But, you’ll need a much larger dish in the piston to keep the same compression ratio.

 

CP Motorworks in WI.

 

Super nice build and outcome, curious about the oil pressure. Is it a default reading on the dyno?

 

Mechanical gauge, not feeding thru the dyno.