SLK/R170: Update on mods!
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Update on mods!
I purchased a new stock throtle body and sent it out to be bored. Stock is 57.15MM and the company I used bored it out to 59.82 which they said is the limit for the stock t/b. Takes about 3 minutes to install. Engine was sluggish for about 10 minutes and then smoothed out really nice. ECU readjusted the air/fuel ratio and increase was easly felt. Car runs a bit cooler now. Went from 196RWHP to 200RWHP. The upgrade is my 3rd to last. Next up is port a new supercharger, and the finish up with port/polish on the cylinder head. RC Engineering out of Huntington Beach will do the fuel sytem testing/upgrading. I am also going to buy a new plastic manifold and bore it out. There is room for the increase to match the t/b size increase on the intake lip. There is also a flange inbetween the t/b and the intake manifold that also needs to be replaced with a custom picece. When the head is ported and polished I may look at custom cams. It will just depend on where the engine in terms of performance. I am hoping to get to 220 to 230 RWHP. I am now at 200RWHP. Car runs so nice and really responded well to the new throttle body.
A look at the dyno sheets shows a loss of approx. 1psi of boost which I credit for some of the cooler air temps in the engine. Porting out the Eaton M45 supercharger will also allow the supercharger to be more efficent which should also cool down the intake air. Vaeth intercooler by January and possibly have some custom intercooler piping. Stock does well and the Vaeth has the same end piping as the stock unit so that should set aside any questions about the earlier intercooler projects that resulted in a hp loss.
A look at the dyno sheets shows a loss of approx. 1psi of boost which I credit for some of the cooler air temps in the engine. Porting out the Eaton M45 supercharger will also allow the supercharger to be more efficent which should also cool down the intake air. Vaeth intercooler by January and possibly have some custom intercooler piping. Stock does well and the Vaeth has the same end piping as the stock unit so that should set aside any questions about the earlier intercooler projects that resulted in a hp loss.
Last edited by steve872; Jul 10, 2008 at 10:32 PM.
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Joined: Aug 2004
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From: Portugal
SLK 230K
Very good!!!!
I like those "mechanic mods"....:-)
I'm planning for a supersprint exhaust header....and a improved intake too...
But for these "kompressors"...nothing better than a "electronic" tuning! eheheh
Just with my mod chip i gained about 30hp...:-)
I like those "mechanic mods"....:-)
I'm planning for a supersprint exhaust header....and a improved intake too...
But for these "kompressors"...nothing better than a "electronic" tuning! eheheh
Just with my mod chip i gained about 30hp...:-)
