WHICH PLENUM AND RUNNERS CAN I USE
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Joined: Oct 2011
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From: lake in the hills,il
Car: 1989 gta
Engine: l98 350
Transmission: auto
Axle/Gears: 2.73
WHICH PLENUM AND RUNNERS CAN I USE
I am looking to buy a used plenum so i can polish it for my 1989 gta 350 .I want to keep my original one on the car untouched.I know that ther were some changes through the years on the plenum and runners so which years is it safe for me to use. also was ther a diffreance betwwen the ones on a 350 or a 305 or can i use them both .thanks
Joined: Dec 2004
Posts: 16,753
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From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: WHICH PLENUM AND RUNNERS CAN I USE
you can use your tb on any plenum the iac passage is open in the back. The 89-92 plenums dont have a air passage for the ninth injector. so if you go with a earlier plenum you will need to block this whole a welch plug works well.
http://www.hotrodlane.cc/PDFFILES/TPIStory.pdf
http://www.hotrodlane.cc/PDFFILES/TPIStory.pdf
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From: San Diego
Car: 1991 Camaro Z28
Engine: 5.7Liter HSR
Transmission: 700r4
Re: WHICH PLENUM AND RUNNERS CAN I USE
i got a polish plenum if ur interested ready to go 89-92runners dont have the cold start option meaning the hole for the 9 injector and and for the the plenum 90-92 are different the have the bracket for the map sensors and extra nipple for it
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