Vic55

Your Challenger will be faster than a stock CLS63 (2008).

mainly

correct me if im wrong, but does it look like there was more power/torque in the low rpm range, before the tune?

did it not just shift the power from the low end to the top end?

Vic55

I think I followed up that issue with a post a page or so back... its due to the wheel spin on the dyno.

mainly

ok, i must have skimmed over it.

mainly

sorry, i totally skimmed over it.

ive been wondering...
about these tunes: there seem to be several companies offering them, and some extremely satisfied customers are reporting back, but....

what about the warranty on your brand new $100,000+ car?

do people just not care about voiding it?

ive heard that its no problem to take the ecu back to stock if warranty work is needed, but then ive heard that they can tell even if there's ever been a tune on the car.

my friend told me his buddy had an ECU tune (this was a BMW 335i) and needed warranty work and he had the tune erased but they said they found - i believe he called them "ghost codes" that were found and they said this was an indication that it had been messed with.


the dealer voided his warranty.

Vic55

I believe that if the dealer is "not looking for it" they will not find it but everything is traceable. If the dealer wants to CSI one's car they will know where the boost was and what changes may have taken place.

I think the tune is worth the money but as always, its a pay to play type of mod. Its not 100% failsafe but it definitely is a harder to detect mod than lets say... an exhaust.

Im a modder type of owner so I cant leave my cars stock; whether it be exhaust, ecu, suspension, and most definitely wheels. The tune on a 63TT has huge gains so Im going to do it.

mainly

alright, so you don't care about voiding your warranty

and apparently no one else does either?

justthebest

I have decided not to tune my new AMGs because of two factors: warranty & the stock preponderance of power.

Vic55

Its only voided if the dealer deems so or the factory. Your comments make it seem like the ones who have tuned their cars (I havent yet) dont care. Of course they care and so would I. But every one weighs out the risk of engine failure and warranty issues against their OWN personal cost/benefit analysis. To me its a very very small gamble for a sizeable gain but like I said there is always risk in aftermarket mods that lead to a failure. But if I tune my car and my radio breaks will my warranty be voided? No.

Dont tune your car, you seem too worried and you seem a bit worried about if we do also.

(I say that jokingly hence the smiley)

If the tunes are true to gains then this car will be crazy fast (already proven by many members here). I have seen these types of gains in Porsche Turbos and I have done tunes on all 3 of my turbos: 996, 997.1, and 997.2. The performance difference is clearly night and day. My GTR is another one that clearly draws me towards a tune. A simple tune and a midpipe and the car is doing high 10's/low 11's. Turbos loooooove boost. It just has to be a safe amount.

Zolivary75

This is only for the ECU tune, car is going back on the dyno once the other mods are complete.

mainly

of course they would have to first deem it voided.. that's a given. and, my thinking was, if they did care why would they risk it? for me it sort of comes down to - if i have an engine failure after ive tuned my car, i dont have 30-040k lying around to just pop in a new engine. (ive kindof stretched to the limit of my budget by buying this car) from the list of cars you listed off, sounds like youre probably rolling in it.. so probably little different situation??? now i did mod my m5,(now sold) ... i had a dinan tune, dinan pulley which were both warrantied by bmw. and an RPI exhaust, but im sure we can agree that a catback exhaust and an ECU tune on a turbo car giving you an extra 100 + horsepower, arent quite the same, in terms of warranty risk.

Rob@vividracing

Honestly look at that dyno sheet. Honeslty what makes these cars so great is that they are tunable like this.

Zolivary75,
Excited to see the final outcome. Might be calling renntech for some more parts here soon!

freefall

I believe that my dealer would do everything possible NOT to look for it due to my relationship with both the sales and services managers. I may be fooling myself but customers are hard to come by...

Vic55

Agree 100%- having a close SA really helps; especially a mod friendly one.

freefall

I know there is a lot of controversy over this but I will tell you what...I got my ECU back from Renntech (Out monday late afternoon, back Wednesday morning) and I am one happy camper and can't wipe the smile off my face.
Even my wife is happy because I am happily running whatever errand she can come up with...

Love the .63 cent line...

freefall

You think putting the badges on is pushing it...

vdubpower

I do

my issue with tunes on cars that are so powerful to start with is, where the heck am i gonna use that power, enless im on a track or quartermiles drag strip

i think its different if you are going from a car with 150hp and adding something on to it to give it 200plus hp, and u would see significant differences

but then again , it is all relative to each owner and driver....

Vic55

You can just claim you are Poseur

Vic55

I have used the power every single day since I got the tune; up top at triple digit speeds and in day to day driving from digs and 30 mph to 100 mph acceleration pushes. What most dont realize is that these tunes on the M157 engines really bring a ton more power in the useful curve of the RPM range. The difference in being able to pass and pull from cars on a straight road is incredible. Like I have mentioned these gains are not placebo in nature.

freefall

I couldn't agree more....especially living in So Cal and driving on the 5...I actually think having this kind of power is SAFER...better to have it and not need it than....

Also - The CLS550 is now a beast of its own and significantly less expensive than the 63..so the amount that you are paying for the extra power over the 550 is WAY more $$$ than a tune on a 63 that will cost you 1500 - 3500 bucks.

Anyway...thats my logic and I am in day 2 of driving with a Renntech tune...and almost broke my wifes next today so now I am only allowed to drive in C mode when she is in the car...

freefall

I'm more of a wanna-be gear head than a Poseur.......but am trying hard to learn from all of you guys.

Since joining the board I have learned how to hardwire my own V1, I installed new side markers and pulled out and put back my ECU. I know I know...kids stuff but I'm getting there....

I plan on posting the V1 install as I found a clear path from the rearview to the diagnostic port (where it get its power now) without removing anything...came out great.

Thank you all very much!

justthebest

Post that V1 info!!!

freefall

I will post those pictures tomorrow but check out the Savvy in the meantime. Its $69 bucks and lets you use the diagnostic port for power. It also allows you to set minimum speed for you detector to, well, start detecting....

https://store.valentine1.com/store/

The concealed display is another must add-on IMO just for the fact that you can place you V1 in better spots run it in dark mode.

justthebest

Yea - I already have the OBD II power thingy; I love the auto speed-based mute.

Still pondering the remote display

freefall

Stop pondering and go for it...I love mine and I just posted the V1 install thread for you.