Difference between 85-88 and 89-92 Intakes
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Joined: May 2008
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From: rockville, md
Car: 1987 Iroc Z
Engine: 383 Mini ram
Transmission: 700r4
Axle/Gears: borg warner 9 bolt
Difference between 85-88 and 89-92 Intakes
So i have an 87 Iroc z 5.7 tpi.
I just bought two tpi setups off of my friend to get ported.
I was on Arkansas polishings website and i noticed they have different polished tpi setups for sale.
Im hoping I didnt buy the wrong tpi intake setup.
What is the difference!?
Anybody know?
I just bought two tpi setups off of my friend to get ported.
I was on Arkansas polishings website and i noticed they have different polished tpi setups for sale.
Im hoping I didnt buy the wrong tpi intake setup.
What is the difference!?
Anybody know?
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From: San Diego
Car: 1991 Camaro Z28
Engine: 5.7Liter HSR
Transmission: 700r4
Re: Difference between 85-88 and 89-92 Intakes
85-88 is cold start setup mening u have maf 89-92 speed density meaning u have a map system since urs its a 87 its a cold start with a 9 injector 89 and up dont have 9 injectors
Joined: Apr 2005
Posts: 7,736
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From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Difference between 85-88 and 89-92 Intakes
In any case it is only a matter of whether the drv side runner has the hole for the CSI or not .Runner can be swapped between the two styles
There are differences in the base however
85/86 has reg SBC intake bolt angle
87+ has different angle on the 4 center bolts to suit centerbolt cast iron heads
85 - 88 have 3rd hole at front for CSI switch;
89+ only have two holes
There are differences in the base however
85/86 has reg SBC intake bolt angle
87+ has different angle on the 4 center bolts to suit centerbolt cast iron heads
85 - 88 have 3rd hole at front for CSI switch;
89+ only have two holes
Thread Starter
Junior Member
Joined: May 2008
Posts: 99
Likes: 0
From: rockville, md
Car: 1987 Iroc Z
Engine: 383 Mini ram
Transmission: 700r4
Axle/Gears: borg warner 9 bolt
Re: Difference between 85-88 and 89-92 Intakes
So basically if i dont have a CSI hole, its alright because the runners can be exchanged, but the base is the real issue?
Assuming i dont have the correct base, they are not interchangeable?
Assuming i dont have the correct base, they are not interchangeable?
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From: Eastern Virginia
Car: 1938 Chevy 2 dr Sedan
Engine: Dart400 AFR190 TPIS ZZ409 Big Mouth
Transmission: Gearstar 700R4 level 4
Axle/Gears: Moser 12bolt-Det Trac loc 3:42
Re: Difference between 85-88 and 89-92 Intakes
How about the plenum differences? Not sure will the older TB with the air passage work on the newer plenum with out an air passage or vice versa.
Last edited by rongreen; Aug 19, 2011 at 08:04 AM.
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