max lift on swirl port heads?
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Same as on most stock GM heads from the 80's and 90's, about .470" lift. This could vary on your heads, so check to make sure, dont use this number as an absolute.
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Joined: Apr 2006
Posts: 18
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Im going to convert back to carb and was thinking of stabbing in this cam http://store.summitracing.com/partde...0&autoview=sku
I think it would go nice with the swirl port heads
wasnt sure if it was to much lift
I think it would go nice with the swirl port heads
wasnt sure if it was to much lift
Joined: Feb 2001
Posts: 13,764
Likes: 562
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
The cam you have selected is okay but honestly I would look for a used LT1 cam. It is a roller cam with about the same specs and can be had for $20 or so. On stock untouched heads you don't want to go past .460" without some measureing. Even at that you risk puling out the pressed in studs. To run more than that it is wise to have the valve guides cuts and to remove the pressed in studs in favor of screw in units. That may be beyond some peoples devotion to SP heads at that point.
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