TBI to TPI
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
TBI to TPI Fairly straightforward. Have a 91 Firebird with a 305 TBI, want to make it a TPI. What all do I need? And yes search is still messed up so please don't respond with that. 
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
Thanks.
They don't mention if I need a harness, I guess I could check the discussion forums instead of just the parts list. Anyone know if I need a whole harness, or is it just a different deal that plugs in for the injectors instead of the TBI injector?
They don't mention if I need a harness, I guess I could check the discussion forums instead of just the parts list. Anyone know if I need a whole harness, or is it just a different deal that plugs in for the injectors instead of the TBI injector?
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
Thanks.
Now replacing the fuel lines, is that up front, or were they different all the way back?
Am I screwed fuel pump wise? I guess if I go TPI or carb I need a different fuel setup?
Now replacing the fuel lines, is that up front, or were they different all the way back?
Am I screwed fuel pump wise? I guess if I go TPI or carb I need a different fuel setup?
Originally Posted by camar0corey
Thanks.
Now replacing the fuel lines, is that up front, or were they different all the way back?
Am I screwed fuel pump wise? I guess if I go TPI or carb I need a different fuel setup?
Now replacing the fuel lines, is that up front, or were they different all the way back?
Am I screwed fuel pump wise? I guess if I go TPI or carb I need a different fuel setup?
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You need to change fuel pumps.
You need to modify your wiring harness to be the same as a TPI harness (they are almost identicaly except for injector wiring and one other wire
They are far more alike than different.
You need to modify your wiring harness to be the same as a TPI harness (they are almost identicaly except for injector wiring and one other wire
They are far more alike than different.
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Originally Posted by Drumer919
You need the TPI harness.
On The Tree
Joined: Jul 2005
Posts: 191
Likes: 0
From: Old Bridge "Raceway Park" N.J.
^ The stock TPI system isn't as bad as some people might suggest. Click Here... 
To the original poster, we did many TBI to TPI swaps throughout the years. I would highly recommend converting to an EBL ( Click Here ) ECM, makes the entire process much more easier, and a great deal more tuner friendly from the get-go....
To the original poster, we did many TBI to TPI swaps throughout the years. I would highly recommend converting to an EBL ( Click Here ) ECM, makes the entire process much more easier, and a great deal more tuner friendly from the get-go....
contact "Dyno Don" on thirdgen.org... he did this conversion for my 92 RS.. he can convert your TBI harness to TPI very easily.. and can also give you a parts list of things you need.. 730 computer with chip, injectors, sensors, ect.
he usually posts in the Southern CA board.. but posts a lot in the TPI and ECM boards..his son Kevin91Z is a mod on that board and is a great tuner..
he usually posts in the Southern CA board.. but posts a lot in the TPI and ECM boards..his son Kevin91Z is a mod on that board and is a great tuner..
Thread Starter
Joined: May 2006
Posts: 3,974
Likes: 2
From: Spring Hill, FL
Thanks everyone. Unless I can get the stealth ram for the same price as the regular TPI parts, I don't think I really need the stealth ram. This is for my moms DD. Its just a 305 with a mild cam, which who knows what the specs on the cam even are. Not trying to go real fast, but would be nice to have the TPI.
