I am dropping in a 327 that is bored over .30 to a 331... The motor has 8.5:1 compression with rebuilt heads with roller rockers a high rise edelbrock manifold that is being opened up to be allowed to breath just that much better.... Looking at doing a 700 cfm carb... Doing a 488 lift cam from comp cams... I will be doing a build thread as I get this started... Let me know what you predict I can produce with what I have listed lol

soulds like an aweful lot of carb for a low compression small cube motor, 250 hp?

I like the motor but you need to up the compression for the higher hp and tqyou are hoping for. from what I know you want higher compression for NA.

also am pretty sure that a 600cfm would be plenty for what you are running. pick up a super chevy or some mag like that .

seen articles with 500 hp 355 sbc's with a 650 carb,afr heads, airgap intake, pistons, cam. only using 650 for 500 hp

for a sbc v8 that is not a torqy motor. some piston flat top or domed pistons to up the compression would be helpful to increase the hp and tq. after market aluminum heads can lower the weight by as much as 50 lbs if you cas afford them.

327 is a motor people like to build for higher rpm (not torque)from what i have heard.

I think the original high hp 327's had either 9.5 ro 10.0 compression and were pulling 360 to 375(with fuel injection). I think the 8.5 compwas used in more mild motors(less hp and tq).i would guess low 330 maybe if timing is done right.

450SX! wrote:I like the motor but you need to up the compression for the higher hp and tqyou are hoping for. from what I know you want higher compression for NA.

also am pretty sure that a 600cfm would be plenty for what you are running. pick up a super chevy or some mag like that .

seen articles with 500 hp 355 sbc's with a 650 carb,afr heads, airgap intake, pistons, cam. only using 650 for 500 hp

for a sbc v8 that is not a torqy motor. some piston flat top or domed pistons to up the compression would be helpful to increase the hp and tq. after market aluminum heads can lower the weight by as much as 50 lbs if you cas afford them.

327 is a motor people like to build for higher rpm (not torque)from what i have heard.

I think the original high hp 327's had either 9.5 ro 10.0 compression and were pulling 360 to 375(with fuel injection). I think the 8.5 compwas used in more mild motors(less hp and tq).i would guess low 330 maybe if timing is done right.

+1

you gonna dyno this thing and settle this? last low compression 327 I saw on a dyno was pretty unimpressive

desktop dyno 2003 shows you at 250hp and 310 ft lbs with the limited info you gave

Apparently I gave the motor a little too much credit.