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Originally Posted by NvrFstEnuff
...Supra TT Mark IV - ...Twin turbo's are my selling point which I've always wanted a TT'd car...
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Actuallly, TT's are
generally more suitable to V-config engines (v6,v8,v10, etc.). The thing that makes the MKIV Supra's TT special is the fact that they run
sequentially. Other than that one fact, there's no significant difference between the performance of two small turbos or one turbo twice the size on an inline-6 engine.
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Originally Posted by NvrFstEnuff
...The car to me seems setup for the option of going to bigger turbo's from the factory but I could be wrong...
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Sorry, there are no larger-than-stock TT's available from the factory. In fact, there are no
sequential larger-than-stock TT's available from anyone.
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Originally Posted by NvrFstEnuff
...BUT not sure on the forged internals part...
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The internals are already forged (or close enough). The generally-accepted reliable max on oem internals is 850rwhp through a 6spd (i.e. 1000hp at the crank). The 'record' single-dyno-pull on oem internals is near 1100rwhp (about 1300hp at the crank)
Quote:
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Originally Posted by NvrFstEnuff
...if the 6 spd's are reliable/rear ends as well...
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Yes ... in fact, over 1250rwhp (produced by 2jz-gte's with 'built' internals) has been repeatedly & reliably run at the dragstrip on through the oem 6spd and the oem diff. Iow, the entire 6spd driveline (other than the oem clutch) is rock-solid. The oem auto tranny isn't quite as beefy, and does need upgraded internals above about 500rwhp.