650hp?

[sprayed98z]

Hi im new here on the forum. I have 1994 n/a supra so, i was wondering how hard it is to make 650rwhp on race gas. The more help the better thanks

[kwnate]

not going to happen with out a turbo. read more then ask.

[sprayed98z]

Sorry Im going single turbo. I know there noway you can make 650hp with a inline 6 all motor just not going to happen

[pwpanas]

Originally Posted by kwnate

not going to happen with out a turbo. read more then ask.

Originally Posted by sprayed98z

Sorry Im going single turbo. I know there noway you can make 650hp with a inline 6 all motor just not going to happen

Actually, that's not quite true. 650hp with nitrous and high octane race fuel actually is doable. Tuning the timing would be critical...

[sprayed98z]

Yeah thats what with a 300 shot of spray. I don't know that's why I asking for alittle help as what's good and not.

[pwpanas]

Originally Posted by sprayed98z

Hi im new here on the forum. I have 1994 n/a supra so, i was wondering how hard it is to make 650rwhp on race gas. The more help the better thanks

Is your '94 n/a supra a 5-spd on an auto? The reason I ask is because the driveline losses are different between a manual transmission and an auto. In order to determine the hp at the crank, and then the size of turbo (and other supporting mods), I need to know which transmission you have.

[sprayed98z]

its a 5speed

[pwpanas]

Originally Posted by sprayed98z

its a 5speed

Realistically, you'll need a turbo with (approximately) a 66mm inducer. You'll also very likely need to put in a thicker headgasket (eg HKS 2.0mm). This is (imho) pushing the upper limits for quick & easy bolt-on mods to an n/a mkiv. Here's a very good kit you could use:
Boost Logic Stage 2 NA-Turbo Kit :: Turbo Kits :: 93-97 MKIV Supra NA :: Toyota :: Boost Logic
...but you'd need to ask for the 525cc injectors (i.e. not the 440cc), and a 66 (or 67) mm turbo. To ensure you'd have enough fuel for 650rwhp, you'd need to bump your base fuel pressure up pretty high...I'd guess about 60psi base (either that, or add a large-shot meth injection kit). After that, it's all tuning on the dyno, as you gradually raise boost from one run to the next.

Please let me know if you have any comments or additional questions.

[kwnate]

525cc injectors will support 650hp? 2 per cylinder?

[pwpanas]

Originally Posted by kwnate

525cc injectors will support 650hp? 2 per cylinder?

Funny guy. 650 at the crank through an auto is just over 500 to the ground. Bump up the fuel pressure (as I stated in my previous post) or add meth injection, and this is very doable. Depending on how much fuel pressure you run, and/or how big a meth shot, even 650rwhp is doable. I agree with you that if sprayed is looking for 650rwhp+ (i.e. perhaps as high as 700rwhp or so), he'd better look at a complete fuel system upgrade.