SL55/63/65/R230 AMG: euphoriaDSM SL65 Build Journal
Back on the rollers this morning and just constant issues. The car pulls great on the street. I spin up to 110mph then finally hook. (my big 20's and 25 series tire out back aren't helping) Can any of you guys shed some advice this way. The car breaks up horribly no matter how we have the car. First tried no dyno mode with just the rear on the rollers, then dyno mode with the rear only on, then dyno mode with all 4 wheels on the dyno simulating real world, then no dyno made with all 4 on and the car just would not do a clean pull. Took the car off the dyno and went for a drive and pulls amazing with no breaking up. We cannot figure out what the heck it's doing. During one of the first pulls we got a Random Misfire code, cleared that and it still continued to break up. Brand new coil packs and plugs so I know there are no issues there.
Other thing I can think of but doesn't seem to fall inline with your problem as much is when I ran with cutouts open prob somewhere around 1/2-2/3 way through the run the car would just end early not to redline. If that's whats happening to yours then at least you have an idea it might have to do something with the exhaust setup, but I don't think you have cutouts. I don't have that problem anymore in my setup which idk if it was the heads doing or removing that crappy v-band where the turbo and the downpipe meets. You probably noticed the stock v-band is weird shaped and the downpipe end of the band where its takes up alot of space and not really 3 inch. I'm thinking that made a big difference.
Otherwise, your and my setup is pretty much the same except for cutouts, and I have hi-flow mufflers. If its not the exhaust maybe intake is choking up? Try running without them and if it runs alot better, you probably need much larger piping for intakes.
Hopefully you find out what it is.
The Best of Mercedes & AMG
So, as already mentioned it probably needs more air.
Your work has given me some good ideas for my 65 so I figured I'd share a few photos with you. One of the photos was taken in your neck of the woods - the old Lotus testing grounds, now NCCAR.
My OEM wheels are in storage, the car has BBS-GTs installed. Lastly, my Meisterschafts sound real nice; hollow rumble at idle and a screaming jet at speed.
Thanks for sharing your work...
Last edited by euphoriaDSM; Sep 21, 2015 at 01:30 PM.
.....Take of the battery (- cable) at the trunk and install it bak after few minutes and try again.
I remember in my car I had the AMG-Speedshift-Pattern some times activated after very spirited driving e.g. in twists. This is normal and is stored in the ECU/TCU from AMG. The car will hold the gear and not upshift until you go off the throttle for a few seconds. This is for sporty driving in twists. Not really sure, if it would upshift then, when you manually shift for higher gear in this situation.
Last edited by AMG-Driver; Sep 22, 2015 at 08:27 AM.
















