Originally Posted by BiGDSLK32AMG
Great info tulsa/toy... Shouldnt the CAI's be more or less the same on these two cars? What have you guys found to be the best performing CAI? I'm more or less stock other than a 181mm crank pulley and some phenolic spacers... both from LET. Maybe I should check out your guys classified section. Any modded SRT-6's around Columbus, OH?
Wow! You did the pulley before the intake?!? You'll see some serious gains from a good cold air intake. I don't know if it will fit on your SLK, but the NeedsWings CAI is primo for the SRT. Dynos show a 25whp gain from just the NeedWings CAI.
You'll also want to keep your eyes peeled for NeedWings to release their intake plenums. They open another bottleneck in the air intake system on our motors. Check with Rob at NeedsWings to verify that they would fit on your car, but I'd bet they would. His preliminary tests show a 35whp gain from the intake plenums. I wouldn't be surprised if the production version squeaks out a couple more whp.
After that, you may want to look into separating your intercooler coolant from your engine coolant. But I don't have any idea if your SLK is cooled the same as out SRT's. There's a few guys here in the forum with some home built systems.
Also, check with InMotion about getting your ECU tuned. After a pulley, it's a good idea to do a custom tune. They say you can get another 20whp from a good tune - I don't know, as I don't have one yet. But you'll at least see better gas mileage.
Also, I make regular trips to Columbus for work. My next is August 5th. If you'd like to meet up and BS over dinner lemme know.