CHEVYNOTCH90

I figure id ask the guys that would know most about sbc

my buddy has a 355sbc with a vic jr intake 750 with vac secondary carb World product Heads with 2.02 x1.60 stailess steel valves swirl polished heads LUNATI CAM Adv. Duration: 295°/295 Lift: .534''/.534'' everything is fresh what would u say HP wise the motor would make... Thanks

AutoRoc

A guess with 11:1 compression and a decent long tube header... 375hp. Those are probably the Sportsman 2 heads also.

terr1bleone

iTrader: (1)

tricky question. what jets are in the 750, also what pistons does it have, whats the intake runner cc on the heads, rocker arm ratio, also what kind of cam is it (flat tappet, solid roller, hyd roller..ect) ?
heres some of the engines i have dealt with below all with similar setups as you.
1970 355- 390 hp- comp 292h
1982 355- 320 hp- solid roller
1970 355- 430 hp- custom hyd roller cam
1978 355- 300 hp- close to stock flat tappet cam
1974 355- 330 hp- unknown cam
all motors had 380-450 torque

id say you should if set up and tuned properly have around 400 hp 380 tq

terr1bleone

iTrader: (1)

also found this
http://www.ryanscarpage.50megs.com/combos1.html

CHEVYNOTCH90

When u say tune what are u talkin about the carb and the timing....????

AutoRoc

Tune just like any other car. Fuel and timing curves.

68birdls1

iTrader: (46)

well check out the car in the sig... has 10.3-1 hypereutic pistons and i run 11.8's consistantly. after doing the hp calculations i have around 440 or so at the flywheel and about 340 to the wheels. something like that, just do a search for 1/8 to 1/4 mile calculations or hp calculations from hp. check out the tci website and they have all the info you need

terr1bleone

iTrader: (1)

when i say tune i mean fuel, timing, and also a big part is backlash on rocker arms most people neglect. also a well built motor with good seals

Villain281H

iTrader: (5)

I'd say if it's set-up right it could make 425-450 hp at the flywheel.

Derek

CTSV05

Are the heads ported? Or OOTB?

I would est. 390-420.