How much Hp do you guys think I am running I just swapped my Lg4 with 181,000 miles on it with a totaly rebulit 0 miles 350/355? Stock heads the block came out of a 1974 Z-28 250 hp the heads where cleaned/rebuilt and I put new lifter. There is only a 1/8 mile track around where I am from what do you guys think I’ll run on it?

MOD’s

1985 Camaro Z-28

350 bored .030 over (355)

Balanced

HEI distributor

Edelbrock Performer intake

Comp cam Lift .447/.447 Duration 290/290

Pacesetter shorttie headers from jet hot / y-pip coated

High flow Magna flow cat

3 inch piping flow master 80 series muffler

308 gears with posi

K @ N Xstream air cleaner

Ac Delco plugs Megafire wires

Air inductions hood

180 thermostat

 

What heads?

what pistons?
what crank?
what rods?

what is duration @ .050?

What carb?

Loose the Performer and go with Performer RPM or Stealth!




with my guess of 9.5cr and stock length rods/stroke, and a decent guessat that cam lift/duration, you should be maybe 300hp at the flywheel, meaning 240 to the wheels(estimating 20% loss), and theoretically you would do a 13.7 max with that much power, if you dead hooked and all.

 

Thanks for the reply!!! The heads/piston/crank/rods I don’t know what kind they are. Duration is .050 carb is the stock Rochester q-jet I had it rebuilt a year ago intake is an Edelbrock RPM I said Performer I was wrong I thought it was the same thing for some reason.