TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old Sep 5, 2006 | 12:22 AM
  #1  
navyCM's Avatar
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From: MS
Car: 87 IROC
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.27
Cold air intake

What are most of you running for a CAI? Im looking for opinions on what you guys have. Not sure which to go w/. Give your opinions on the ones you guys are running. Thanks
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Old Sep 5, 2006 | 12:41 AM
  #2  
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From: Port St Lucie, FL
the best ones are the ones you make yourself, dont waste 150 or more on some piping and a cone filter some idiot slapped together for you when u can do it yourself for under 50 bucks. you can either use PVC pipe and paint it or measure what size pipe u will need and go to an exhaust shop and get a 3 inch mandrel bent piece that size
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Old Sep 5, 2006 | 03:20 AM
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From: MS
Car: 87 IROC
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.27
What are the best ways to make one?
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Old Sep 5, 2006 | 10:10 AM
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From: Port St Lucie, FL
Ok here is how I made mine.

1. Go to any hardware store and get a 4 inch to 3 inch rubber adapter and 3 or 4 3 inch rubber connectors (it should be around the pvc stuff) Also get a 90 degree elbow of pvc pipe then get a small straight piece of PVC and maybe like a 45 degree bend PVC pipe.

2. Paint PVC.

3. Remove all of your old intake piping, old airbox and charcoal canister.

4. Put 4 inch to 3 inch adapter on the throttle body, connect the 90 degree elbow to that.

5. Connect MAF to 90 degree elbow with 3 inch rubber connector.

6. Connect the rest of the piping routing it as close as you can to the fender.

7. Connect cone air filter.

Youre done! its that easy

If you want it to look more stock looking you can use an intake elbow off a 88+ TPI car in place of the 4" to 3" adapter and 90 degree elbow
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Old Sep 5, 2006 | 01:32 PM
  #5  
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Don't you need your charcoal canister? Won't vaccum be effected?
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Old Sep 5, 2006 | 01:33 PM
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From: Port St Lucie, FL
nope just cap off the vac lines
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Old Sep 5, 2006 | 01:34 PM
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Engine won't run like crap though? If I was to remove mine, cap off the lines, the engine would act normal?
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Old Sep 5, 2006 | 01:36 PM
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From: Port St Lucie, FL
Mine runs fine.
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Old Sep 5, 2006 | 02:43 PM
  #9  
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Joined: May 2006
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From: Yay Area, CA
Car: 1988 GTA
Engine: 350 TPI
Transmission: 700-R4
Axle/Gears: 9-Bolt 3.27
I took my off, car runs fine.
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