355 sbc

994 Views 3 Replies 4 Participants Last post by ericnova72, Jun 8, 2009

pena0724

Discussion Starter · Jun 8, 2009 (Edited)

Hey guys i just finished my first rebuild on a sbc 350 and am not getting the kick i want from the start this is what i have going in my 87 olds cutlass supreme 350 turbo stock 7.5 rearend

350 bored and honed .30 over
lower end balanced
flat top hypernuaetic pistons
Alum dart pro 1 heads 180 runners 64cc 2.02 intake 1.60 exh
victor jr intake
4150 Holley 650cfm double pumper
3 inch headers converted down to 2.5in true duel exhaust droped before axel
comp cam here are the specs. http://www.compcams.com/Technical/Search/CamDetails.asp?PartNumber=12-246-3

huges 2,500 stall
summit HEI setup cd box, distributor, coil and wires.

any suggestions?

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JAKEJR

· #2 · Jun 8, 2009

What do you mean by now getting enough "kick"?

Based on your CID and 180cc Dart heads, my thinking your cam has too much duration. A 230/236 is best in a 383 or larger CID engine. What that does is move the power band too high in the band and without a lot of rear end gear the engine will feel soft down low.

Jake

West Point ROCKS!

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ap72

· #3 · Jun 8, 2009

That cam is a little big for a stock rear gear, but not too terrible. You can move up a little on the gear later after your rear end explodes. I'd go with a RPM intake over the Vic Jr. though, the Vic Jr either needs more cubes, or more gear to make it shine. Be sure to check quench distance- it'll have a big effect on power and tuning.

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ericnova72

· #4 · Jun 8, 2009

These cars typically have 2.41, 2.56, or 2.73 gears. Change them to something 3.42 or better and you will be a lot happier with the off-the-line performance.

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