cam duration vs vacuem
#1
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Join Date: Dec 2004
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Car: 73 camaro rs
Engine: 327
Transmission: 700r4
cam duration vs vacuem
Hi I am doing a 327 tpi sbc swap. Would like to run a .500 lift cam with the duration around 260-270. I undestand the tpi likes to see 14-16 inches off vacuem. My question is if I run a vacuem pump, can I get away with this? I am using port and polished large valve camel hump 461 heads, the block is bored 4.060 and I am using keith black hypertech pop-up pistions with a .100 dome height 2 reliefs. Looking to get around 400 hp and 400 torque, will this work? maybe a comp cams 12-250-3?
Last edited by mhoh2; 12-18-2004 at 09:19 PM.
#5
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Join Date: Apr 2002
Location: Houston, Texas
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Car: 1989 GTA Nighthawk
Engine: 389 CID TPI
Transmission: TCI 700R4
Axle/Gears: 9 bolt 3.23
Hate to rag on you, but those heads, well, they are not worth the cost to hot tank them. They are old and almost worthless, 30 year old technology. Get some decent heads. The cam should work fine.
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