SL55/63/65/R230 AMG: First post...
I'm looking at the VRP "VR550" Pulley/ECU Kit + their shorty headers.
Any comments on this kit? I have an "030" SL55 2007
Price vs. performance compared to others?
Guesstimate of HP/TQ gains (if you assume or have seen different than their claims?)
Any side-effects I should expect (except a large charge on my credit card?)

Thanks
The 55K engine is very tunable, and there is allot left on the table (Thanks AMG). What it comes down to is how much power you want or need, what you are going to use the car for..... and how much you want to spend.
As with many mods, there is a law of diminishing returns. You can get decent gains with modest expenditure, and the higher you go up the ladder the gains become incrementally smaller.
I'm looking to match an SL63 (which I think is about 100HP higher rated?)
What approach would you take for another 100 HP (flywheel) or 80 RWHP (if that's a good computational comparison.)

I would think that a pully replacement with CAI + mufflers along with a custom ECU tune would get you most of the way there for not much scratch.
-ROOK
I've had good luck with VRP parts and good interactions with the people who used to run company, Victor and Vadim, but they parted ways a while ago. I see that the VRP Tuning website is still up but I would encourage you to contact Victor to make certain the company is still in operation.
Other tuning companies worth taking a look at include Veloce (Dino's company), Evosport, MBH, Kleemann, and Renntech. I'm sure there are a few others that I'm forgetting.
Based on the track times it runs, my car probably makes around 650 crank HP. It pretty much takes the mods in my signature block to get that much power out of the engine. I've had no issues with the car. It's my daily driver and it fires up every morning without fail.
Good luck with your modding!
here is our complete 55 product guide:
http://www.evosport.com/product/vehi...Kompressor.pdf
Thanks
brad
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