Plenum porting
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Joined: Jun 2002
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From: Sweden (malmö)
Car: 1990 Trans Am GTA
Engine: 5.7 TPI 350 sd
Transmission: A4
Plenum porting
Can anyone explain how to port a plenum because i´m buying TPIS large tube runners and they are going to flow better if i fix the plenum. And i will ad an AFPR, anyone were i can get a new one cheap?? what gains will i see on stock 350?
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Joined: Jul 1999
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From: Sydney, Australia.
Go here http://members.optushome.com.au/iroc-z/downloads/ and download the plenum.pdf file.
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Joined: Jun 2002
Posts: 234
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From: Ottawa,Ontario,Canada
Car: 1989 Iroc-Z
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 2.73 (for now)
Thats a really good article... I was searching through
previous posts and found lots of other info on porting the plenum but I still have 2 questions...
1. The gaskets (FelPro 93035-1 or GM equivalent)
Where can I buy these?? And are they necessary?? Couldn't I just reuse the old gaskets???
2.The torque specifications??? How do I know if I tightened the bolt 15ft/lbs?? I usually just tighten things till I can't tighten them anymore
previous posts and found lots of other info on porting the plenum but I still have 2 questions...
1. The gaskets (FelPro 93035-1 or GM equivalent)
Where can I buy these?? And are they necessary?? Couldn't I just reuse the old gaskets???
2.The torque specifications??? How do I know if I tightened the bolt 15ft/lbs?? I usually just tighten things till I can't tighten them anymore
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Joined: Feb 2002
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From: Winnipeg,MB
Car: 1991 Camaro Z28
Engine: 350 L98
Transmission: 700R4
As for your second question you should be using a tool called a torq wrench. They're not cheap though. Try borrowing one from someone you know.
Remember don't steal one that would be wrong.
JK
Remember don't steal one that would be wrong.
JK 
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