I Have Already Completed A Full Gsl To GSLSE Conversion on My First Gen, Now I Am Out To
Convert My 86 S4 Na To S5 TII. I Am Wondering Has Any One Done This Using A S5 Engine Harness And A S4 Chasis Harness? I Should Be Able To Re-Pin The Connector From The Main Harness To Match The ECU.
When I converted MY GSL To A SE I Changed The ENTIRE Harness From The Cubby Foreward. I Want To Avoid This After Pulling The Complete Chasis Harness Out Of The Donor Car I Discovered The Size Of The S5 Harness.

 

http://www.rotaryresurrection.com/turboconversion.htm

Did it take you a long time to capitalize every word in your post?

 

 

you can wire up the s4 body harness to the s5 cpu (n370) you need the thrid plug off an s5 dash harness i can send you my shcematic just pm me with ur email.it's jus you need to move the wires around on the plug and wire up a power n ground for the ecu, also you also need to jumper 2 wires on that big plug under the dash that the engine harness runs next to.
Brandon

 

I followed your same planned conversion s4 NA > s5 TII. It helped tremendously going with a LT8.

Have you considered going with a standalone EMS? All the work will be In the Engine Harness of your conversion that the Microtech replaces.

 

TurboII RudeBoy

Could you email me the info @ arch8300@yahoo.com

 

Thanks for all the help

Bryan