I have a eagle stroker 383 kit with stealth ram intake, comp 503 (.510) lift cam, 1:6 roller rockers, Patriot aluminium heads, 10:1 compression. Shop said it should have an estimated 450hp to crank. Car at dyno 286hp/296lbs to wheels . BUT, the transmission was going bad and on dyno blew third gear out. I was wondering what numbers the car should be putting to wheels.

 

my 383 made 465 crank HP 472 ft lbs.. on the engine dyno..

mid 12s at the track confirmed this..

my advise; if the entire drivetrain & exhaust is not optimized for the new engine.. the chassis dyno will tell you...

A healthy 383 needs needs a healthy exhaust system a 3 1/2 collector pipe min.

I used to run a 4" mufflex system with 3" y-pipe to hooker super comp headers.

 

350 whp wouldnt be to bad for that cam and heads.... On a dynojet. 20-30 less on some mustang dynos but not all. Just depends on calibrations

 

Agreed. My 355 with trick flow heads and the LT4 hot cam made 325 with a conservative advance on a mustang dyno.