Thread: Looking to buy supra
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Old 04-05-2007, 01:42 PM   #6
pwpanas
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Quote:
Originally Posted by SupraMan1784
...its gonna cost you a lot more to do the modifications than if you wanted to put in larger turbos on an alrdy turboed 2jz...
Agreed 100%+++
Quote:
Originally Posted by SupraMan1784
...start with the basics, a full exhaust system that frees up the flow of the motor including intake...
Actually, the oem mkiv tt intake and the oem mkiv tt 'catback' exhaust both flow just fine for your first set of upgrades (up to about 500hp at the crank). You do need to remove the catalytic converters and replace them with a straight-through downpipe to get above about 375rwhp. You'll also need a GReddy BCC to eliminate fuel cut after you raise your boost, and then a boost controller (or any other method) to raise your boost. Be sure to increase your fuel's octane to match your boost level.
Quote:
Originally Posted by SupraMan1784
...and maybe a new header brings out significant hp on a turbo supra...
Actually, there's no way to replace the oem header on the Mkiv Supra TT, and still keep the oem twins in there. The exact size and shape of the oem header is absolutely critical to the oem tt sequential setup.
Quote:
Originally Posted by SupraMan1784
...and the stock end is pretty much unbreakable...
Also agreed 100%, if you're talking about the Mkiv TT engine, the 2jz-gte!
Quote:
Originally Posted by SupraMan1784
...you can achieve 500hp without upgrading the turbos...yea, ive known a couple of people that have run 500hp on the stock twins...i think around 550hp is when you have to upgrade the whole turbo system
Agreed, if you're talking hp at the crank. If you're talking hp at the wheels, then 500rwhp is almost impossible with the oem twins, as well as being extremely impractical. Although 475rwhp+ has been achieved a by a very few Supras with the oem twins using race fuel and high boost, even this figure is extremely rare ... AND it's always been done with a brand-new shortblock and an extremely low-mileage set of oem twins. If your 2jz-gte has anywhere near 100K miles (or more), then ime you'll be very lucky to exceed about 420rwhp through a 6spd using race fuel and high boost.

In general, if you're sure that you want 500rwhp+, you'll need to consider a single turbo and an upgraded fuel system.
Quote:
Originally Posted by SupraMan1784
...the stock motor itself can handle the power, but it gains a lot through simple bolt ons as well...
If you're talking about the TT engine (the 2jz-gTe), then I agree completely. The 2jz-gte is generally accepted/proven to handle 850rwhp reliably, and over 1000rwhp max (assuming proper tuning and sufficient octane of fuel, of course).
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Phil '94 Supra Turbo, 6spd, 'APU'+
Displacement is no replacement for boost.
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NB: Please consider posting any help requests in a new thread instead of asking me for help privately. About 99.9+% of the time, private help requests end up covering great information that could be very valuable to other forum members. If you have a good reason for needing the help request to be private, I'll consider it. If not, then why not give everyone else the opportunity to pitch in too, and/or learn from the information? Remember, there's no such thing as a dumb question. We're all here to help within this family of Supra owners.
Last edited by pwpanas; 04-05-2007 at 02:49 PM.
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