89 Formula LsX fuel system
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 56
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89 Formula LsX fuel system I'm picking up an 89 formula on Sunday
It had no engine or trans
It originally had a Throttle Bodie 350 in it with a 700r4
Or that's what the guy who's selling it said
If so cause I knew they throttle bodies then but I never knew they put. TBI 350 in those cars Pontiac or Chevy I thought they were only TPI
What is the deal with the fuel tank
I heard a TPI was recommend something about the right bellows in the fuel tank or something when wanting to do an LSX swap
I'm going to a 5.3
Would this car be ok or would I have to find a TPI car fuel tank
It had no engine or trans
It originally had a Throttle Bodie 350 in it with a 700r4
Or that's what the guy who's selling it said
If so cause I knew they throttle bodies then but I never knew they put. TBI 350 in those cars Pontiac or Chevy I thought they were only TPI
What is the deal with the fuel tank
I heard a TPI was recommend something about the right bellows in the fuel tank or something when wanting to do an LSX swap
I'm going to a 5.3
Would this car be ok or would I have to find a TPI car fuel tank
Stock tank is fine. I drew out a diagram and PN list for complete fuel systems for 3rd gen swaps in the additional info thread in the LS1 swap sticky on TGO
GM only used two tanks for all 82-92 cars. Standard and 1LE baffled. 90-92 cars got the baffled tank (all models) and earlier 1LE cars got it too. Every other 3rd gen has a standard non baffled tank. Dont worry, the baffles dont help that much for cornering, Id use it as-is. Your 89 305 TBI car also got the EFI fuel sender, so thats another plus if its not rusted beyond use. Swap in a high pressure pump and rock on
Formulas were basically a base model firebird, V8 and WS6 suspension. Beyond that basically any combo was fair game. 305TBI, 305TPI, 350TPI, 700R4, T5. There was never a 350 TBI put in any 3rd gen
GM only used two tanks for all 82-92 cars. Standard and 1LE baffled. 90-92 cars got the baffled tank (all models) and earlier 1LE cars got it too. Every other 3rd gen has a standard non baffled tank. Dont worry, the baffles dont help that much for cornering, Id use it as-is. Your 89 305 TBI car also got the EFI fuel sender, so thats another plus if its not rusted beyond use. Swap in a high pressure pump and rock on
Formulas were basically a base model firebird, V8 and WS6 suspension. Beyond that basically any combo was fair game. 305TBI, 305TPI, 350TPI, 700R4, T5. There was never a 350 TBI put in any 3rd gen
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 56
Likes: 0
That's what I thought I didn't think there was a TBI 350 in a 3rd gen its not y first Horra with one is these
The guy who has the car said he cut out the sensors but to a point to where you could re instal them
Since I'm going to a 5.3 does that really matter since I'll be buying a painless harness anyways
It had a 350 in it with I believe he said a 10-44
And it was carbed
I knew about having to get a Welbro or some kind or fuel pump to keep up with the 5.3
Any specific I should get
I seen someone say they used a 255 and some said he had like a gS340 or something like that
Not a big fan of this but cause it had blower
There is a 6" cowl hood on it already
I don't assume I will have clearance issues with a 5.3 stock intake manifold
The guy who has the car said he cut out the sensors but to a point to where you could re instal them
Since I'm going to a 5.3 does that really matter since I'll be buying a painless harness anyways
It had a 350 in it with I believe he said a 10-44
And it was carbed
I knew about having to get a Welbro or some kind or fuel pump to keep up with the 5.3
Any specific I should get
I seen someone say they used a 255 and some said he had like a gS340 or something like that
Not a big fan of this but cause it had blower
There is a 6" cowl hood on it already
I don't assume I will have clearance issues with a 5.3 stock intake manifold
Thread Starter
Staging Lane
Joined: Oct 2013
Posts: 56
Likes: 0
That's what I thought I didn't think there was a TBI 350 in a 3rd gen its not y first Horra with one is these
The guy who has the car said he cut out the sensors but to a point to where you could re instal them
Since I'm going to a 5.3 does that really matter since I'll be buying a painless harness anyways
It had a 350 in it with I believe he said a 10-44
And it was carbed
I knew about having to get a Welbro or some kind or fuel pump to keep up with the 5.3
Any specific I should get
I seen someone say they used a 255 and some said he had like a gS340 or something like that
Not a big fan of this but cause it had blower
There is a 6" cowl hood on it already
I don't assume I will have clearance issues with a 5.3 stock intake manifold
The guy who has the car said he cut out the sensors but to a point to where you could re instal them
Since I'm going to a 5.3 does that really matter since I'll be buying a painless harness anyways
It had a 350 in it with I believe he said a 10-44
And it was carbed
I knew about having to get a Welbro or some kind or fuel pump to keep up with the 5.3
Any specific I should get
I seen someone say they used a 255 and some said he had like a gS340 or something like that
Not a big fan of this but cause it had blower
There is a 6" cowl hood on it already
I don't assume I will have clearance issues with a 5.3 stock intake manifold
But he cut the sensors out in a way to where to Could put them back in do you go go back to original if you wanted to
Then he dropped a Blown 350 in it
