onebadblazer92

I have a bbc 454 bored 100 over in a 92 k5 blazer 4wd lifted 6 inches on 35's stock 373 reciantly replaced the pinion and ring rebuilt 700r transmission and new stock converter ovel port heads and comp cam i dont know the size of the cam off the top of my head but has good bit a lope hei distributer keith black pistons and cast crank cast stock intake with 3 inch spacer and a 650 edelbrock 4 barrel carb me and my dad built it and recently started it up and it acted like it didnt have much power and seemed like a turd lol is there any way to boost horsepower witb out replacing heads and putting more compression in the motor

Onlyhavechevy

Do you know what compression youre running? Is this the original transmission that came with the car? 650 sounds a little small for the size of engine you have.

pancherj

I built a 496 for my friends 1971 Monte. It has stock oval ports (049). The combustion chambers were huge (121cc). I milled them as far as we could go (110cc) and purchased some small dome pistons. That gave us just shy of 12:1 compression. It has a Comp XE 274 camshaft. It has some decent guts, loves an 850 double pumper, needs a good bit of timing (initial and total). If you are low on compression, small carb, not enough timing, etc...I can believe it is a turd. especially with those big tires, 3.73 gears and a stock converter!