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deadtrend1 · 05-05-2008, 08:26 PM

-TBI requires around 14 psi of fuel ... TPI needs around 42 psi. therefore the pump needs swapped. Should be ok with fuel lines .. I think
-Wiring harnesses need swapped (your 87 has 8+1 injectors, as opposed to the TBI's 2 and the sensors are all different)
-Also your 87 TPI uses MAF, while the TBI uses MAP, with is also among other reasons you need to swap the ecms)
-Shouldn't have vats issues when you put the 87 ECM into the 91, but I never experimented with it so I'm not sure)

05-05-2008, 08:26 PM	#2
deadtrend1 11 second club / Moderator Join Date: Aug 2004 Location: West Berlin, NJ Posts: 7,148 iTrader: (11)	-TBI requires around 14 psi of fuel ... TPI needs around 42 psi. therefore the pump needs swapped. Should be ok with fuel lines .. I think -Wiring harnesses need swapped (your 87 has 8+1 injectors, as opposed to the TBI's 2 and the sensors are all different) -Also your 87 TPI uses MAF, while the TBI uses MAP, with is also among other reasons you need to swap the ecms) -Shouldn't have vats issues when you put the 87 ECM into the 91, but I never experimented with it so I'm not sure) __________________ 2001 Trans Am WS6 •SLP Loudmouth II •UMI Suspension •12.857 @ 109.57 1996 Trans Am WS6 •Pacesetter Longtubes •Strange 12 Bolt •Spohn Suspension •11.152 @ 123.85