Jasoneo5

iTrader: (4)

Hey all,

I was going to post this question my LS forum, but since the GS is more "performance driven" i thought I'd ask here being that I have the same engine:

How much HP can I stock 99 1UZFE engine take without changing the injectors, fuel pump etc.?

How much could it take after upgrading the injectors and fuel pump?
--How much would this cost?

Looking at some 400-500hp GS400's, I am just curious, how much would I have to spend (engine alone), to make it ready for that kind of power?

Thanks,

-Jason

Lextreme

8 psi about 370 to 380 rwhp
Supported Claim:
* Lextreme 8 psi yield 325 rwhp with bad rings and no tuning stock everthing (90 LD400)
* Chrisman 8 psi yield 370 rwhp stock everthing (92 SC400)
* AAP TT SC430 15 psi yield 605 rwhp (2003 SC430) Not stock fuel or computer

ChrisK

iTrader: (1)

If I'm not mistaken Mr. Johnson runs on 8.5 psi with 425 rwhp without any problems. Hopefully he can confirm.

Jasoneo5

iTrader: (4)

And this is on a stock motor!? How stressful is this on the motor its-self, and how much would it cost me to "safely" obtain this motor reliablity and life?

Say for example, I wanted to use NOS (not that I would, I never would do that to it), but if I did, what would I have to do to the engine to safely do this, and how much would that cost me?

Thanks.

morris

iTrader: (2)

389hp stock engine, stock fuel pump, larger injectors 220K miles.

TTurboPimp

iTrader: (12)

your not going to push 400 to 500 rwhp with stock injectors and pump.......and your not going to safely push over 8 or 9 lbs on stock internals without risk.

morris

iTrader: (2)

turbo pimp, I too am interested in the limits of the engine itself, how did you come up with the 8-9 psi limit on the interenals?

HKS_GS430

why not NOS? its the cheapest way to get a low et.if you dont want to stress the car all the time. nos wouldnt cause anymore stress then if you FI the car.NOS is only dangerous in a noobs hand. i have seen gs300 do 13's with just 75 shot spray.

Lextreme

Some guy made very good hp with the V8 in Australia. I forgot what he made, but in the 400s with 8 psi. Did about a minute long burn out video too.