My MKIV Supra build-ish thread...big boy 3.4L motor time

General Information

Most of you that have access to FB have probably already seen this but I did part ways with my Turbo TA yesterday. I've owned that car for over 10 years and took it from completely stock to a monster that is easy to drive and fun to thrash. I will miss that car but where I am in my life is I'd like to slow it down a bit and just have some cruisers and the TA deserves better than what I'm will to do with it. I think it's got everything to be competitive in the right hands. The new owner is a good friend of mine and lives less than a mile away from me so we will be seeing each others cars often that's for sure so it's not gone gone. This was not an easy decision but a combination of right place, right time, right person and right price as I had to come up with some cash on the difference. I would never sell this car normally as I don't think I could trust someone to not hurt themselves in it, but the new owner is more than capable of handling it and I'll be able to still see it perform at the track albeit from the sidelines and not in the drivers seat.

Edit: I'm going to turn this into a mini build thread and document some progress

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Latest updates

Some minor under hood mods

Dec 30, 2023

Just a few cosmetic changes. Bought a coil cover and clear front timing gear cover. Waiting on the middle plastic piece to close it up. Also had a carbon fiber cooling panel made to clean up the front a bit more. Had an sp racing chrome panel that always just looked out of place. I’ll probably ditch the strut tower bar.

Reactions: dpwalsh14, IDAFC21, Jimy Bilmo and 6 others

SleeperLS

Love the details

Some pics from a detail shop that reached out to me

Dec 14, 2023

I took my car to a local detailer here in Texas that wanted to use it for promotional purposes for their business. Pics came out great. May be a rehash of some of the pics @Mook already posted but enjoy

Reactions: SleeperLS, Shawn1112, SaturdaysGS and 6 others

Last update on the tuning

Sep 23, 2023

So we decided to stop at 35psi. We pushed 38 but the car wasn’t making any more power. We are hitting the limits of the intake manifold or turbo. Motor and fuel system are good for 1600whp so we have the headroom if I feel I need more but for now the pt7675 spools up nicely, has a great fat powerband and the engine is not working hard to make 1100whp with 35psi and 15* of timing. I may go slightly larger turbo but it will be at a sacrifice of midrange power and response.

Car drives great btw, the response is very similar to my old 3.0/pt6765 but on spring pressure alone it makes a little more than my old setup at max boost.

Ac works great and the engine temps were very good in stop and go traffic. Not bad for a street car. The sounds this car makes is sooo different than my old setup. The little extra displacement and compression is nice for low rpm cruising. I don’t feel like I’m lugging the engine as much under 2k rpm.