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this probably seems like a rediculous question but i can't figure out which greddy turbo timer harness to get. it seems like every website is telling me something different. so i'm trying to go by part numbers.

this site says that the part number for an 87-90 supra and the part number for a 91-92 supra is 15910003
http://www.nolimitmotorsport.com/greddy/electronics.html

this site says the part number for a 91-92 is 15910003 and the part number for an 87-90 15910001
http://www.eautoworks.com/html/ape-auto~performance-Turbo~Timer~Harness.htm

i have an older style greddy turbo timer and i want to make sure i get the right harness.
 

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Big HP = Big Downtime
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I think all the harnesses are the same on the turbo timer side. But they do differ on the ignition side. Just pic the right year range for your car
 

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T.T. harnesses should be the same. Just be sure to get the one for your year because the harness is different from the 86-88 and the 89-92.
 

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suprajr said:
T.T. harnesses should be the same. Just be sure to get the one for your year because the harness is different from the 86-88 and the 89-92.
No the harness changed in 1991, not 90

Get the HKS harness. It works the same, works on all TT's, and is much more readily available than any of the other harnesses.

TT-1 is the harness for 87-90 and TT-3 is the harness for 91-92. Get the HKS harness and be done!
 
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