RPI ECU Flash
Last edited by bhamg; Jul 22, 2010 at 07:01 PM.

Everything that comes out for the 63 engine has been done and dynoed at the owner's own choice. Brian's x-pipe was originall dynoed on their own dyno probably. EVERYTHING has always been the same way. So why the lack of trust now? I've told you, if you really don't believe me go get the tune and dyno it yourself. This is my experience and what I SAW from the gains. I'm not bsing you or anything.

Everything that comes out for the 63 engine has been done and dynoed at the owner's own choice. Brian's x-pipe was originall dynoed on their own dyno probably. EVERYTHING has always been the same way. So why the lack of trust now? I've told you, if you really don't believe me go get the tune and dyno it yourself. This is my experience and what I SAW from the gains. I'm not bsing you or anything.
).Anyways, I agree with you that RPI's dyno reads very low, but that is okay as you are only looking at the delta. When I dynoed my car at RPI, Eloy was very honest with me and told me from the beginning that his dyno was a very low-reading dyno. He offered me corrected numbers and non-corrected numbers. I chose to go with the non-corrected numbers despite them being so low. I also dynoed my car at 3 other places: 2 dynojets and one Mustang Dyno so I know exactly where the car stands. In general, I rather brag about a car that dynos a 100 hp but runs mid 11s than a car that dynos 1000 hp but runs 14 seconds down the 1/4 mile
Last edited by MB_Forever; Jul 23, 2010 at 07:17 PM.

Everything that comes out for the 63 engine has been done and dynoed at the owner's own choice. Brian's x-pipe was originall dynoed on their own dyno probably. EVERYTHING has always been the same way. So why the lack of trust now? I've told you, if you really don't believe me go get the tune and dyno it yourself. This is my experience and what I SAW from the gains. I'm not bsing you or anything.
The Best of Mercedes & AMG
Please note that I'm not implying or inferring anything regarding what is possible and what is not possible on the C platform, but I can confirm from personal experience and a lot of exposure from the E and CLS platforms that the E63 and CLS63 should average between 410 to 420 wheel hp. In fact, if you take 415 whp as the mid point, using an 18% drivetrain loss, it comes out to 507 hp at the crank.
First, it is sometimes hard to duplicate real driving conditions on a dyno. Things like load on the car, wind speed, aerodynamic resistance, tire/road contact resistance, etc... This would cause your car to react a little differently on the dyno vs on the road. It would be hard to generate 130 mph winds without a wind tunnel. I like dyno dynamics and mustang dynos because you can at least duplicate some load on the car although it won't vary as it will on the road... but still better than no load.
Second, there have been countless cases of people purchasing mods and tunes then posting very strong dyno numbers that dominate all other dynos posted before them within the same class of mods... but then when those people actually track their cars, the cars end-up performing very poorly - often below stock even. Dyno numbers are great, but usually without a solid track number, they are just a number. Track numbers are how the car actually performed in real life testing. I can't tell you how many times I've seen people post that their cars put down 500 to 600 wheel hp but when they actually go out to a track, they discover their cars run only 13 seconds
This is actually a good indicator to go back, work on the mods some more/tune some more, then come back out and try again. After a few attempts, you'll be able to filter what mods work and what won't.By the way, tracking your car does not equal to trashing your car. You can still do it in a fancy manner. You can go during a private rental where there is only 10, 20 or 30 guys to avoid the 400 car chaos on public test n tunes. You also don't have to do any burnouts or even race anyone. You just line-up and go as if you're on the street.




