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Yeah the Supra is quite numb, floaty, and unpredictable on the stock suspension. The good news is it’s fixable, though.

Have you ever had an alignment done on your car? If so what were the specs? If not that’s your problem, these cars often come out of the factory with the alignment pretty far out of spec.

1 quart in 3.5k isn't bad, especially with 0w20. If you take it to the dealer they'll just say that anything less than 1 quart in 1k miles is normal.

Drop to 5mm spacers or remove them entirely. I had to remove the spacers on the rear when I switched to 295/35/19 RT660s on the stock wheels due to rubbing.

Did they at least re-hone the cylinders before dropping in the new pistons/rings?

Yep that was it. I never disconnected the flex fuel sensor, and it’s a latching connector so I didn’t even think to check it, but somehow during the manifold install it came unplugged. What threw me is that the flex fuel system was still reporting 51% ethanol, even after disconnecting the...

Decent tone, louder and deeper than the stock downpipe, but still too quiet for me HKS + AA is louder than OEM + AA. I never ran the HKS exhaust with the stock downpipe. From what I ran: OEM+OEM < OEM+AA < HKS+AA

Yeah that’s one of the first things I did when I got the car

I don't have any sound clips, it's not the first time someone has requested one so I'll think about it once my car is running properly again. I do like it, when on the throttle I think it sounds fantastic, and if you switch it to normal mode it quiets down significantly for driving through...

I have the Super Turbo with an AA catted downpipe. I never ran the Super Turbo with the stock downpipe, so I can't comment at all on what that sounds like. As far as what it sounds like with the AA downpipe, I'd say that Normal mode with the HKS sounds about as loud as Sport mode did with the...

FYI - I finally got a hold of him through email and he’s issued a refund, so I’m squared away now

Hm, looks like it’s related to the flex fuel system. According to this page: https://zeitronix.com/Products/ECA/ECA2CAN.shtml “CAN input status” of 1 means “sensor fault”, I suspect that’s why the tune is dropping the max cylinder fill to 100. It’s still reading the right ethanol content...

Do you know what a Zeitronix CAN input status of “1” means by any chance? Edit: according to this page it’s “sensor fault”, cool cool cool… https://zeitronix.com/Products/ECA/ECA2CAN.shtml

Last weekend I installed the EOS manifold, got it all buttoned up, went for a drive, and was only making 3 psi. I figured it was a boost leak, in pulling the manifold back off I found that the FTP charge pipe was ovaled from over-tightening the clamp. This weekend I replaced the charge pipe...

Come to a full stop, then manually shift to 2nd. The car will no longer shift to 1st automatically anymore until you turn the car off/on. If you want it to be permanent, as @zrk said you can do that with the XHP tune.

The shift points in normal mode are much better with just the flash, but I did tweak 6th-8th a bit from the defaults. I’m on the stage 2 flash.

Faster, smoother shifts, and it makes normal mode actually usable without bogging the engine constantly. I actually like normal mode now and use it all the time, I never used it before because the shift points were terrible.

If I had a stock Supra and had to mod it all over again, the XHP flash would be the first thing I did even on a bone stock car.

Found this, I’m hoping it’s responsible because if not, I’m out of ideas. I didn’t even tighten the clamp *that* hard, but it definitely deformed the charge pipe. I have a P2uned replacement on the way from Jesse at 1FS, he said he’s seen this before with the FTP and the P2uned should be stronger.

Welp, went for a test drive and the car is only making 4 psi. Pulled the manifold back off and everything looks fine, all o-rings in place, all evap lines connected, all holes in the manifold (that I'm aware of) plugged. No idea where the leak is coming from.