Hello! New member to the forum, as well as new owner of '05 Blue SRT6 Roadster. Love the car...nothing like cruising with top down and enjoying the SRT6! Any info/suggestions on increasing the horse power? Not that it's not fast enough, but more is always better! I'm in NY, anyone know of anybody trust worthy in my area? Thanks for the help!

 

The usual way with a supercharged engine is to change the pulley to spin the supercharger faster, within limits of course. We have done this with our MINI Cooper S, it is a common mod in that community and MINI does it as part of the power increase on their John Cooper Works upgrade. That said, we've only had our SRT6 coupe a short time and I haven't read too much about it.

 

I looked into the Kleeman kit http://www.kleemann.dk/site and it appears to be a smaller pulley and a new serpentine belt. Their website looks, at first glance, to have lots of info, but if you dig in, you will see it is fairly generic. I resorted to corresponding with someone there by the name of Caspar Gorm, and the price quote was $2,595 Euro, which is around $3k. Really. $3,000. They claim something like 400 hp, but that is starting from the 354 the SL32 had. Since the Crossfire ECU is remapped with a less aggressive spark curve because of the lower octane U.S. gas, the realistic output would probably be around 375 hp.

The only other thing could be a re-map of the ECU. Not sure if anyone can do the SRT-6. From my Upsolute Chip upgrade experience on my first Crossfire, I would probably stay away from any SRT-6 chip upgrade unless you have 93 octane and/or live in a cool climate. The moderate pinging I experienced on the non-supercharged Crossfire engine could spell disaster for the SRT-6 motor.

There might be a K&N filter available (anyone know?), but I would stay away from this too. The 3-5 hp (hotly debated numbers, none of which you will actually feel) improvement is not worth the reduction of engine life in my opinion, and with the supercharger, it may be a reduced supercharger life as well. Also not good.

In summary, there is really not a thing you can do for more horsepower besides the Kleeman kit. At least not yet, and I am not holding my breath.

 

Thank you! I'm going to look into all of this. Let you know if I find any other info!

 

That's an outrageous price for a pulley and belt. The typical price, including installation for the MINI is $450-600. Remapping the ECU is a good idea if you change the pulley, depends on how far you go. A 14% pulley might be handled by the standard map and fuel injectors, a 19% probably not. Our fuel is a problem and if you are in a 91 octane area, like I am, (also have high temps.) that does limit what you can do.