considering the manual says 87 is acceptable....
detonation with a side of knock retard wont be noticeable like you have mentioned... less seat of the pants power MAYBE.
i went through this before i baught mine. I could either spend 2-4000 for a mostly orginal supra or 6-10,000 for a well prepped one. paid 7200 for an upgraded turbo, hks stopper hg, and a very very very long list of replaced/upgraded parts including paint, drivetrain, fuel, and suspension....
Not a supra but a bhg none the less. Buddies grand prix blew one on a v6. We pulled the heads and low and behold the gasket was PERFECT. Nothing what so ever showing a bhg. ONLY sign was a tiny tiny line of rust on the cylinder bore. We found the crack in hg with a 5X microscope. The guys...
why dont you pm the two guys that said they could build them? IJ's stuff isnt "run of the mill". Even if some one else built it (doubt it) he modded it most likely.
To be fair twins can serve a purpose, if they are set up sequentially (yet to see it on the 7m). Ive seen a few tri-turbo 2j's. Though the money spent could easily buy you a Ferrari (novelty car like mentioned).
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