iroczman

is .030 over on a 350 a 355?
And how can i get 375 hp and 400 and over ft/lbs out of a 355 carburated? thinking a rv cam

__________________
89 iroc tired tpi 305, 700r-4 and 2.73 posi rearend
soon to be my LITTLE RED NIGHTMARE!!!!! (in storage)

99 grand prix silver 3.8 loaded (daily driver with 190,500 miles and going like a top!)

POOR COLLEGE STUDENT!!!!!!!!!!!!!!!

ct91rs

Yes, thirty over would give you a 355 cid engine.

Displacement = # of cylinders x .7854 x bore^2 x stroke

8 x .7854 x 4.03^2 x 3.48 = 355.116 cid

About the hp. It's possible, but without a shot or forced induction, your probably looking for some good heads/intake/carb/headers-dual exhaust to find those numbers.

blindeyed

How did you come to get ".7854?" The equation I use when I figure my numbers is: (3.14)(bore²)(stroke)(#cylinders). Because to get the volume of a cylinder, don't you need (3.14)r²h, then multiply that by the number of cylinders? Just kind of curious as to how you came with that. Because when I put in his bore & stroke on mine, I came with 352.29 ci. Am I doing this wrong?

__________________
- Jason
1995 Pontiac Firebird


User Guidelines | VB Codes Explained | AF Merchandise
"Each of us, is in the scheme of things, insignificant.
But millions of insignificant people, doing a tiny bit,
can add up to be a very significant force."

ct91rs

pi/4

I came across it one time, and it eliminates cutting the bore (diameter) in half to come up with the radius. But if you don't remember the number, it's just as much work.)

Displacement = # of cylinders x pi x bore radius^2 stroke

8 x 3.141 x 2.015^2 x 3.48 = 355.1152

or
Displacement = # of cylinders x .7854 x bore^2 x stroke

8 x .7854 x 4.03^2 x 3.48 = 355.116 cid

blindeyed

Ah, I see. Very ingenius, I would have never thought of that.

__________________
- Jason
1995 Pontiac Firebird


User Guidelines | VB Codes Explained | AF Merchandise
"Each of us, is in the scheme of things, insignificant.
But millions of insignificant people, doing a tiny bit,
can add up to be a very significant force."

89IROC&RS

AHH its off by .0008, you silly little rabbit.............



but anyway, the power figures youre looking at with an RV cam are probly pretty optamistic. id be looking at some vortec heads and a mild hydrolic roller cam with around .470in of lift. and moderate durration. check out hot rod magazines, or chevy hi performance magasines "agent 87" it was a low buck 355 with vortec heads that ran 408hp and about 400ft/lbs of torque.

__________________


Chevrolet Camaro - I enjoy beating the hell out of people

http://www.automotiveforums.com/vbulletin/showthread.php?t=68052

iroczman

thanks guys.

__________________
89 iroc tired tpi 305, 700r-4 and 2.73 posi rearend
soon to be my LITTLE RED NIGHTMARE!!!!! (in storage)

99 grand prix silver 3.8 loaded (daily driver with 190,500 miles and going like a top!)

POOR COLLEGE STUDENT!!!!!!!!!!!!!!!

Morley

375 on a carbed engine is easily obtainable, the torque figure you are looking for, you probably won't get or just barely make 400. For torque you can't beat TPI.
Go with 9.5:1 compression, some nice alumnium heads (ported 113 corvette heads would do), a good cam kit, single plain intake manifold, a quadrajet carb (yes a quadrajet..I'll explain later) headers and a good freef lowing exhaust (doesn't have to be duals, a good 3" single will work just fine)
The reason I say quadrajet is that they have small primaries which will get you some decent fuel economy. but the secondaries are absolutely huge, for that quick launch or passing. And they are very reliable. I've personally had nothing but trouble from Holley carbs, that and everyone wants a 750 double pumper...this is just plain too much carb for any small block that isn't an all out race engine.