3800 series 3 swap (Page 1/3)
Guy Fiero in FL APR 27, 07:29 PM
I just bought an 04 grand prix gtp motor transaxle harness and computer. I know I need older throttle body, but what year and model harness and computer do I need to use the motor and transaxle? Also for fuel do I just use a 3 port adjustable regulator? I have a chance to buy a harness and computer out of an 03 Buick lasabre, I just don't want to buy the wrong parts. Please help. Lol
olejoedad APR 27, 09:03 PM
The first question is do you want to keep the E-throttle?
Guy Fiero in FL APR 27, 11:02 PM

quote
Originally posted by olejoedad:

The first question is do you want to keep the E-throttle?



No I'm looking to keep it simple but I do want to use the 04 transaxle
hnthomps APR 28, 08:54 AM
Manual or auto transmission for the 3800 SC engine?

Nelson
olejoedad APR 28, 09:03 AM
The E-throttle is simple, all that's needed is to mount the pedal.

Guy Fiero in FL APR 28, 11:01 AM

quote
Originally posted by hnthomps:

Manual or auto transmission for the 3800 SC engine?

Nelson



Auto and out of a 2004 grand prix gtp.
Guy Fiero in FL APR 28, 11:09 AM

quote
Originally posted by olejoedad:

The E-throttle is simple, all that's needed is to mount the pedal.



The pedal should be included with it. It's being delivered on Monday. What about the fuel pressure sensor and returnless fuel system? Also what software are you guys using? I use to use C.A.T.S. Tuner software for my old supercharged lt1 corvette.
olejoedad APR 28, 01:00 PM
The fuel delivery issues can be worked around.

The Series 2 rail can be cut and used to regulate pressure and provide the return line to the tank and a single line up the the series 3 fuel rail.

Most folks use an aftermarket (Walbro) pump rated high enough for the delivery/pressure requirements. It is in-tank mounted like the OEM Fiero pump.
Dennis LaGrua APR 30, 07:17 PM

quote
Originally posted by olejoedad:

The E-throttle is simple, all that's needed is to mount the pedal.


Although DBW operation can be achieved, on my series III I went with a 2000 N* cable operated throttle body using the adapter from ZZ performance. Although I never tried DBW I have read that there are programming issues that must be overcome that are not easy.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, custom ZZP /Frozen Boost Intercooler setup, 3.4" Pulley, Northstar TB, LS1 MAF, 3" Spintech/Hedman Exhaust, P-log Manifold, Autolite 104's, MSD wires, Custom CAI, 4T65eHD w. custom axles, Champion Radiator, S10 Brake Booster, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

olejoedad APR 30, 07:24 PM
A competent tuner should have no problem.
Archie uses DBW throttle bodies on his LS swaps.
There are many DBW 3800 swaps as well.