[STiLLsLow]

Originally Posted by mike@x-ph.com

No worries with stock cats but i recommend you only use E85 when you have a tune that can monitor fuel,AFR,etc...

Thanks Mike, that's why I picked up the JB4 from you! Unfortunately I'm still trying to troubleshoot those logging issues I'm having and hoping for a reply on n54tech any time now. Since I haven't been able to properly log, and since I heard of ethanol possibly melting the cat, I haven't used it again since the first tank (of 4 gallons).

[MBWORLDZ2019]

Hi there

Did you purchase the RC "S"? From their website, it shows 52hp and 54 torque gain.
Is the newer one they have only has the dial from 1 to 5 for fine tuning ?

Originally Posted by DigitalNav

Hello,

I got a racechip ultimate for my car as I wanted something quick and easy for some power. Install took me 15 minutes and I never worked on a car before.

Stock power on these cars at the wheel is seen on average at about 277 WHP and 280ish TRQ.

The dyno run that produced the most (blue) was a 5th gear pull.

Mods: Resonator delete, KN Filter, RaceChip (F Setting), E85+91oct.

[Bmw doubles]

Originally Posted by MBWORLDZ2019

Hi there

Did you purchase the RC "S"? From their website, it shows 52hp and 54 torque gain.
Is the newer one they have only has the dial from 1 to 5 for fine tuning ?

Out of curiosity why racechip? If you're going that route the jb4 is the best piggyback in the biz with tons of customizable options. Even smoother MHD also highly customizable.