86 fuel rail tpi on 87 intake Tpi
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Senior Member

Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
86 fuel rail tpi on 87 intake Tpi
Ok so I'm in the process of disconnecting the tpi manifold setup an placing it On my 87 tbi 305 truck engine so far I got the tpi intake (87-92) manifold the fuel rail from the 86 with all injectors plus cold start. I'm in the process of putting the one belt serp setup on an notice that the bottom steel fuel line sticks out intstead of tuck behind the alt kinda hits on the ps pump is there a way to make it work Or do I have to change the steel lines an fittings
Joined: Dec 2004
Posts: 16,895
Likes: 1,014
From: Mile High Country !!!
Car: 1967 Camaro, 91 z28
Engine: Lb9
Transmission: M20
Axle/Gears: J65 pbr on stock posi 10bolt
Re: 86 fuel rail tpi on 87 intake Tpi
If you are using the serpentine off of the tbi truck the radiator upper hose will rub on the belt. you need the 88-92 tpi alt bracket and new lines to run behind the bracket or convert the rails to rear feed.
Thread Starter
Senior Member

Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: 86 fuel rail tpi on 87 intake Tpi
no im using a serp set up off of a 1989 gta but the fuel lines sit in front off the serp setup instead of in back under the alt looks like ill just bend the lines alittle bit to make them not rub on the ps pump pulley
Joined: Oct 2001
Posts: 12,228
Likes: 1,156
From: Il
Car: 1989-92 FORMULA350 305 92 Hawkclone
Engine: 4++,350 & 305 CIs
Transmission: 700R4 4800 vig 18th700R4 t56 ZF6 T5
Axle/Gears: 3.70 9"ford alum chunk,dana44,9bolt
Re: 86 fuel rail tpi on 87 intake Tpi
To do it correctly you neet the 2 behind the alt..
Thread Starter
Senior Member

Joined: May 2011
Posts: 855
Likes: 1
From: New Bedford MA
Car: 1988 Gta trans am
Engine: LR4 4.8
Transmission: 98-02 t56 6 speed
Axle/Gears: Bw 9 bolt (3.70’s) pbr rotors
Re: 86 fuel rail tpi on 87 intake Tpi
yea i talked it over with the gf an thats how she wants the lines to be so ill get new lines tomorrow an make the bends to be under an behind alt like my 89 gta was
Supreme Member
Joined: Apr 2010
Posts: 4,337
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From: Aurora, OR
Car: 87 IROC Z28
Engine: 355 cid TPI
Transmission: Custom Built 700R4 w/3,500 stall
Axle/Gears: QP fab 9" 3.70 Truetrac
Re: 86 fuel rail tpi on 87 intake Tpi
My 87 is stripped down the basics as there is no emissions testing in my area. I run the TPI with an ACCEL DFI controller and it is converted to speed density, thus eliminatimng the MAF sensor. For the engine to operate, you need fuel supply, injectors, TPS, ECT sensor, IAT sensor, MAF or MAP sensor(depending on whether it's speed density or MAF system), and some kind of ignition. If you are using the factory ECM, you will probably want to stay with the factory HEI ignition. By routing the sensor wiring harness under the runners, I have made it much less conspicuous. In fact, as part of my recent underhood work, I rerouted much of the engine harness and with a little more work I could make it almost unnoticeable.
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