most of you know i sent a e mail to my friend to see if he had any sugestion or ideas for us on the ESP, Gears, ect... this is his reply to me.
Hi Shawn,
Thank you for the congrats.
Changing to the 16� wheels shouldn’t be any problem if you are staying with the same rolling diameter of the tires. I am not sure if you have enough clearance on the brakes. I am not sure if the dealer has access to the settings of the transmission control unit anyway.
There is a big liability question on mods to ESP; we have not done anything yet to any model. Also, on the 500’s and 55’s there is a high risk of damaging the transfer case without ESP.
Why are you guys interested in changing the ring and pinion? If you need more torque and power, we have a supercharger kit for it that works very well and we have done quite a few G-models already, in fact we have 4 of them right now in our shop having it installed. This won’t be cheap, you need to change front and rear and transmission needs to be reprogrammed.
Let me know if you need anything else,
Hartmut
So it seem like there is not much he can do for us because of liability.
"Why are you guys interested in changing the ring and pinion? This won’t be cheap, you need to change front and rear and transmission needs to be reprogrammed.
If you need more torque and power, we have a supercharger kit for it that works very well and we have done quite a few G-models already, in fact we have 4 of them right now in our shop having it installed."
After installing larger tires and lower gears there is no need for reprogramming the tranny. Speed and rpm will be as before.
"there is a high risk of damaging the transfer case without ESP." ??
The guy is clueless!
I have to agree with Harald, sounds like a supercharger salesman to me[xx(]
As mentioned, the reason for fitting the lower gears is so that we can run larger tires for off-road use. This concept is the standard in the off-road community. Simply fitting a supercharger is going to do nothing more off-road than cook the tranny fluid.
There is also no reason to program the trans if you do a well thought out change to tires and gears, the trans will never know the difference. The ESP on the other hand is exactly what we are trying to prevent from freaking out due to big changes in the diameter of the tires.
The ESP / transfer case comment cracks me up. FYI, the G made it for 22 years without any ESP and the transfer cases survived, imagine that [;)]
Thanks for the effort Kerr. It would be great to figure out a way to defeat ESP but, this guy you talked to completely missed your point I think.
I am not understanding why mbusa techs wouldnt have access to the trans control unit. i understand why they would say they cant change the settings, but not why the wouldn't have access to it.
im still not understanting how larger circumference tires affect the ESP at all, as i understood it the system would somehow detect wheel slippage and vehicle yaw and apply the brake and/or lower engine power to keep the vehicle stabalized. I still don't understand how tire circumference affects either one of these calculations. I can see the system doing this by monitoring the revs/sec(min) of each tire and comparing them then doing its thing, now as long as each tire is the same circumference give/take it shoudnt ever get confused, I cant really think of another way to do it.
i seriously DOUBT that disabling/changing the ESP settings has any adverse effects on the trasmission at all. now i CAN see where dropping a super/turbo charger on a system would put more strain on the tranny if you didnt change anything else at all, but im tired and a little smashed so I am probably not making any sense now anyway.
The ESP likely uses vehicle speed as a reference as well as wheel speed. I suspect that it is an extremely complex "map" of variables that controls individual brakes and the throttle. Larger tires are very likely to put it outside its programmed parameters. The larger tires can effect speedo readings by 5-10 mph easily, so the ESP thinks you are at a different speed than you are and will react to what it thinks you are doing and doesn't actually know what you are doing as one of the inputs has been changed. That would be my concern, though I have no way to confirm it. You could be right and big tires and/or gearing changes might not make any difference.
This is all geared towards on road behavior anyway as these systems are completely disabled once a locker is engaged anyway.
I've seen several comments about turbos. Do they make a turbo or supercharger for my G320?
Are there any concerns if I do add one?
Chuck
There are a couple that could be done. They are pretty spendy though. I think the best route is a 3.6 conversion by RennTech (in FL) or Brabus. The conversion gets you a new engine with about 275hp I think, for about $12-15k. There is an outfit in the UK with a 320 twin turbo bolt on but I think that is even $10k. Certainly could be done and I wouldn't be concerned about it one bit.
yea he did sorta miss what i was saying. they are use to the rich, drop $30K in mods and not think twice about it. Also i dont think he wants to be responsiable for us braking parts. Hartmut ownes renntech so I guess he wanting to help, but for those of that want to use the G as intended he is probably in the rock and a hard place. Im sure they can any program we want. Just have to talk him into it. Also i think MB covers renntech parts so that could be another issue if axles, and stuff start snapping off road becuase of a traction system they worked on..
I can see both sides of this. Guess we are just out for now :(
I wondered if that is who you were talking to. It flat amazes me that he would comment on the ESP having some negative effect on the t-case. This is a guy with deep connections, he used to work for AMG before they became an MB subsidiary. He is also responsible for some SERIOUS MB sedan mods, like the V12 E-class and a bunch of other stuff. I suspect you are right Kerr, if he wanted to hack the ESP, he is more than capable of doing so. His seemingly shallow response really surprises me.
Linear Mode
