FPR1939

I was originally thinking about either supercharging or turbocharging my ISF, but with the high static compression ration 11.8:1, there is very little room to boost. Max boost would be in the 4-6 psig range. If I were going to turbo this engine I would tear it down and replace the rods with forged steel rods and the pistons with lower compression forged aluminum pistons.

I think with long tube headers, CAI, true dual exhaust and a tune we may be able to approach 400 rwhp.

We will see.

Pat

MRxSLAYx

^^ I want to run at 4psi. Im almost 100 percent sure that my setup will be perfect at that boost. Another thing to think about is the flexibility i will have once on boost. If i want to go extreme and am already on boost,i can easily do it.

javyLSU

iTrader: (21)

I guess the fact that I talk to Joe almost every single day (as a matter of fact he just left my house about an hour ago) has no significance here...

Javier

flowrider

iTrader: (9)

Maybe

Lou

IS-Fast!

This may be a stupied question, but how would MHP's tune not void the warranty? I am under the impression once you tune the ECU and the dealership finds out they will void your warranty. Is this correct?

lobuxracer

iTrader: (2)

Only the powertrain warranty. The rest of the car is still covered.

Also - modding the car's performance assumes a number of risks, not the least of which is failure to provide reliable transportation. If your F is your only car, you would be foolish to go the extreme route. If it is one of a number of cars you own and you have reliable transportation through either another car or easy access to some other form of transportation, then the extreme route might be just what you want.

Side note: with the single exception of the MkIV Supra's Getrag transmission, Toyota as a general rule has not built strong transmissions. They're adequate for stock power, but significant increases in torque have proved to be problematic especially in the automatics. Assume you will run into service life issues with your gearbox if you increase torque by 25% or more, since the 8 speed we have in our F is just another in a long line of Toyota gearboxes. I certainly could be wrong, but if history is any teacher at all, our gearbox won't like the kind of torque it takes for 500+ hp for anything like the original expected service life (typically 200k miles).

FPR1939

Lobuxracer, I will not say where I heard this so don't ask. This could be an urban legend, but is believable.

I understand that an unknown police officer in a state not to be named has a Tundra with a supercharger. The original tune removed the speed limiter after the installation of the supercharger. Said officer kicked the Tundra up to above 150 mph for a bit and destroyed the 6 speed auto. It seems that the 6th gear was not designed for that much torque. Toyota replaced the transmission but retuned the ECM to limit the speed.

Pat