Might have been an older one?
SP still has their bolt-on SP61 for the MK3, but it's internally wastegated
http://www.spracingonline.com/images/products/3143.jpg
I've had a buddy run the Supertech springs in his 2JZ with great success. He revved to like 8500-9000 RPMS quite often for a few years and never had problems.
Sure it's not a 7M, but it's the same company so should be same quality
If all you want is the sound of a wastegate, get a full 3" BIC open dumb divorced down pipe (mouthful, eh?).
Honestly, it would be easier to go full T4. Or if you're that dead set on it, there are CT26 to T3 adapters with a port for an external 2 bolt wastegate. You can get that with a T3/T4 or...
MR2's and Celica All-Tracs with the 3S-GTE did use CT26's, but the actuators I've seen sit differently that than, and also the exhaust housing is structured differently haha
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=BE&P=37
Correct me if I'm wrong, but it looks like power comes from pins A8 and E3 to power the tachometer, then grounds through pin A6. Pins E1-3 are on the little white box on the back of the cluster, which seems to come in turbo...
Yeah, Flateric is suggesting part of the problem could be the cluster ground on the crash support bar (metal beam behind dash). He said it was located behind the glovebox, but I cannot find it for some reason.
(As per Jeff Lange's advice) I've done continuity tests between pin D4 at the cluster...
Well my problem persists.
I installed a yellow plug GTE harness, and I am STILL having the same problems.
I have no idea what it could be. I am soooo pissed off right now.
Headlights don't illuminate.
Water temperature doesn't read.
Oil pressure doesn't read.
Tachometer doesn't read.
I am...
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