Is this a problem: 88 large tube runners on 89?
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Junior Member
Joined: Mar 2006
Posts: 36
Likes: 0
From: DFW Area
Car: 89 IROC
Engine: vortec head/ZZ4 cam/TPIed 350+.040
Transmission: 700R4
Axle/Gears: 3:27
Is this a problem: 88 large tube runners on 89?
Guys, I just purchased a great set of used ASM large tubes off an 88 corvette. However I have an 89 IROC. I know I can plug the CSI hole in the runners. But there is a CSI tube that runs up to the Plenum. When bolted to my 89 Plenum, the tube is open to the outside air because the 89 plenum is missing the additional casting for the CSI.
Is this a problem?
Is this a problem?
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
Re: Is this a problem: 88 large tube runners on 89?
Yes, a huge vacuum leak like that is a problem. You need to seal that entire CSI tube.
Thread Starter
Junior Member
Joined: Mar 2006
Posts: 36
Likes: 0
From: DFW Area
Car: 89 IROC
Engine: vortec head/ZZ4 cam/TPIed 350+.040
Transmission: 700R4
Axle/Gears: 3:27
Re: Is this a problem: 88 large tube runners on 89?
I figured but, was not sure how the CSI air flow worked. I guess plugging the hole or getting a plenum from an 88 are my choices.
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