MrBojangles

I was just reading over Pettit's website and from what I have read/heard they are one of the most experienced rx7 shops in the US.

Now on their TKT package they install a cold air intake, a cat back, and a pulley system to get 60 hp, dynoed 320 to the wheels. With no ecu modification at all.

Is this safe? I have searched and everything I find says after two mods you need to upgrade the ECU.

Also just a second question, is much beneift really realized from the pulley system? Or is it very minimal, as with these systems on most other vehicles?

Black97VR4

Yeah, that setup safe without ECU, but you're not going to be down 320rwhp either. The pulley does help but not by alot.

WaLieN

That setup will not produce 320RWHP. As said above, UD pulley kits (they vary from just alt/water pump to crank pulley sets) will help, but not that much. The accessories are already trimmed quite a bit to save weight, losing a few more ounces will not produce that much of a gain (especially at lower rpms). One of the main benefits are that they do reduce caviating of the water pump (where the pulley spins to fast that it is just churning air) at high rpms.

http://www.wvinter.net/~flanham/wla...l/3modrule.html

Contrary to popular belief, the stock ECU runs very rich. If the boost is kept at stock levels, the ecu will handle more than 3 mods (given you don't have insane boost spike).

SpeedKing

iTrader: (4)

Pulleys don't do ****.

scratchjunkie

you can run a resonated midpipe too and have 10.x afrs






just kidding or am i?

potatochobit

iTrader: (1)

pulleys are only good for saving your water pump and alternator and A/C life LOL

Trexthe3rd

255 engine hp +60 = 315 engine hp, that is possible. But NOT to the wheels.

evil7

I have ecu replacement good for 14psi boost,my car ran mid-low 12's on it,I will sale for 200.00,I paid 600.00.I have a power fc now.