Need advice on my new supra i bought.
 

Ok i bought a 1994 supra with T78 greddy turbo.Upgraded intercooler,CP pistons,upgraded throttle body and intake,Greddy blow off,and HKs Vpower computer. The car doesnt get tuned until next month. It's a new build and they have it on a rev limiter cut off so i don't even know how much HP it has. Do you guys have an idea what kind of hp this car should have. The guy says 800hp but i don't know.

6spd or auto? What cams? How much boost?

Ok it needs to get tuned next month. The rev limiter has been set at 4800rpm then cuts out. I see it goes up to about 11psi. first gear goes up to 5psi. I dont know what cams. 6 speed.

Does it have an upgraded fuel system? Are the CP pistons at the stock compression ratio (CR)?
You really do need to find out what cams it has. Worst case, you can always remove them and get them measured. Without this info, I can't tell you how much power it should make.

Assuming oem CR pistons:
1) On the stock fuel system, don't push it past about 550rwhp or it will run lean and bad things will happen to the engine. 550rwhp will require race fuel ... probably 100 MON octane at least.
2) If you have an upgraded fuel system, it'll do about 700rwhp on the oem cams. This will require race fuel - probably 110 MON octane at least.
3) With an upgraded fuel system and upgraded cams, you can hit 775rwhp with that turbo. Use 116 MON octane race fuel to hit this number.