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      03-07-2016, 10:26 AM   #1
ricky430
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My opinion on tuning....and a new engine required

Okay guys I have a lot of experience behind the wheel of a lot of different high end cars.

I wanted to share my opinion on bms tune vs ecu tuning in general. I have had renntech upgrades done on all my mercedes vehicles. I enjoy the extra hp boost. ml63 and s63 coupe both made for a lot of fun. the sl63 already spins tires under wot so didn't get it done.

Unfortunately, with the m6 being a rear wheel drive car and piggyback systems pretty much just upping the hp/tq curves early makes for a nightmare to rip off lights etc. You can not WOT off of a light and have the car take off like it does without the piggy back. The tires spin way too much and i'm talking with brand new Michelin PSS. Launch control sucks because the car once again burns out. brother in CLS63 vs m6 got my ass handed to me bad over and over. stock vs bms tuned car. BMS may be inexpensive but it actually makes for an overall more annoying car.

To add to all of this I now have a m6 that eats excessive amounts of oil in the block. Lucky for me I took the tune off before I dropped the car at bmw after numerous drivetrain malfunction faults. Something I have never had for 20,000 miles on a m6 without this tune. The tuned car has been at dealership repeatedly. It is an absolute nightmare so do yourself a favor and don't bother. The renntech tunes have never given me a problem but its a completely different engine so I can't really say a m6 tune vs a piggyback would be any better.

On another note...Why isn't bmw putting an awd system in the m6? the s63tu can not be the benz's m157 stock vs stock and every m157 amg is now awd with the exception of the sl63.
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      03-07-2016, 11:05 AM   #2
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      03-07-2016, 06:57 PM   #3
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Originally Posted by MMG640 View Post
Did you have a red Lambo Murci long time ago?
I did have a lambo murci but it wasn't red
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      03-07-2016, 09:11 PM   #4
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so what exactly is the point of this post?

talking the m6 down? or the benzo up? maybe you dont know have to drive? with an awd all you have to do is pull the trigger.... w the m6 it takes a bit of skill... meh just my opinion.
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      03-07-2016, 10:47 PM   #5
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Quote:
Originally Posted by mastermayhm View Post
so what exactly is the point of this post?

talking the m6 down? or the benzo up? maybe you dont know have to drive? with an awd all you have to do is pull the trigger.... w the m6 it takes a bit of skill... meh just my opinion.
LOL ... lets see the next Gen ... M with a x-drive ... like Benz AMG went 4matic

Been a few posts re the advantages vs disadvantages of AWD and Rear only ... time will tell, but seems everyone with higher HP is doing AWD!!!

With 250 hp back in the day and thin tires ... not much you could do ... but now with CRAZY HP and FAT STICKY RUBBER ... the need maybe AWD!

But the question remains ... did the Tune result in the issue you speak of ... or simply abuse with the GO FAST Peddle
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      03-08-2016, 09:36 AM   #6
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Quote:
Originally Posted by mastermayhm View Post
so what exactly is the point of this post?

talking the m6 down? or the benzo up? maybe you dont know have to drive? with an awd all you have to do is pull the trigger.... w the m6 it takes a bit of skill... meh just my opinion.
i guess i did kind of ramble...

1) m6 loses to cls63 by a much larger gap with bms from a dig than withkout bms
2) cls from a dig beats me by a larger gap than when i dont have bms if you didnt understand point 1
3) with bms i consistently get drivetrain malfunction code something i had NEVER gotten without the bms
4) after a few thousand hard miles on m6 with bms my car NEEDS A NEW ENGINE
5) GO PRICE S63TU RREPLACEMENE
6) share your opinion on if its worth buying a tune or not
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      03-08-2016, 09:38 AM   #7
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Cls63 Is 2013 Making It A Rear Wheel Drive Car That Im Racing
since i own both cars the result is the same when i drive cls and brother drives m6

both cars launch control cls no tune m6 tuned m6 loses by a larger gap

zero driver input dry flat road launch control


2014 Cls63 Turned Awd. Only Speaking Of The Fact That After 12 And 13 Benz Smart Enough To Go Awd In Cls S E Etc Yet M6 M5 Still Rwd

cls63 2013
sl63 2015
ml63 2014
s63 coupe 2014
m6 2013
f430 spider 2009
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      03-18-2016, 07:45 AM   #8
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I own a m6gc and my previous car was a cls63 pp 10 out of 10 times the m6 would beat it in a roll race and I recently destroyed a rs7, SLS Amg, and a Cls 63 s all cars stock and all were roll race.... off the line the Cls 63s and Audi rs7 take off quicker but on the long run the m6 catches it roll race it takes um right from the start, that's the Beauty of a rwd car, also the m6 gc feels more expensive then a 63 s and the rs7, it feels like it's a class higher.
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      03-18-2016, 08:44 AM   #9
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      03-18-2016, 10:09 AM   #10
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If you're losing by a wider gap with BMS then you must not be very good at launching RWD cars. You never want to "just mash the throttle" on a high power, high torque RWD car, tuned or otherwise. If you're losing this way then it's 100% driver error. I got far faster 1/8 mile and 1/4 mile runs from my car with the BMS than without and I'm not by any means an expert driver, then again I understand I can't just mash my foot down, the throttle needs to be modulated greatly in a tuned M6. BTW I always found LC useless in the M6, even in stock form.
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      03-19-2016, 08:53 AM   #11
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Quote:
Originally Posted by Twitch Massacre View Post
If you're losing by a wider gap with BMS then you must not be very good at launching RWD cars. You never want to "just mash the throttle" on a high power, high torque RWD car, tuned or otherwise. If you're losing this way then it's 100% driver error. I got far faster 1/8 mile and 1/4 mile runs from my car with the BMS than without and I'm not by any means an expert driver, then again I understand I can't just mash my foot down, the throttle needs to be modulated greatly in a tuned M6. BTW I always found LC useless in the M6, even in stock form.
Okay fair enough. I will admit I'm the furthest thing from a race car driver here. I have never gone to a 1/4 mile track so I do appreciate the advice.

How do I launch it? Is it possible to set the RPM at a lower setting? Everytime I've tried to modulate the throttle launch control doesn't work.
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      03-19-2016, 03:18 PM   #12
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Quote:
Originally Posted by ricky430
Quote:
Originally Posted by Twitch Massacre View Post
If you're losing by a wider gap with BMS then you must not be very good at launching RWD cars. You never want to "just mash the throttle" on a high power, high torque RWD car, tuned or otherwise. If you're losing this way then it's 100% driver error. I got far faster 1/8 mile and 1/4 mile runs from my car with the BMS than without and I'm not by any means an expert driver, then again I understand I can't just mash my foot down, the throttle needs to be modulated greatly in a tuned M6. BTW I always found LC useless in the M6, even in stock form.
Okay fair enough. I will admit I'm the furthest thing from a race car driver here. I have never gone to a 1/4 mile track so I do appreciate the advice.

How do I launch it? Is it possible to set the RPM at a lower setting? Everytime I've tried to modulate the throttle launch control doesn't work.
I don't recommend using launch control in the M6. I just don't think it's very effective. Better to just do an old fashion launch and feather the throttle as needed. I got my best 0-60 and 1/4 mile runs without LC. I know a couple of people that can keep the car in completely check on a full balls to the walls launch with LC but even they recommend the old fashioned way for speed and LC only for fun and fireworks.
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      03-20-2016, 03:28 AM   #13
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M6 is not best car for standing drag races...
It is very difficult to find a traction even for stock car.
I agree with Twitch Massacre that using LC is waste of time, i also do my best 0-100km/h and 1/4 mile without using LC but just "playing" with acceleration and gear changes. (best 1/4: 11.466@128.4mph) which is I think NOT BAD for stock RWD car






However roll race rollraces is a different story
Stock car can keep up with 991 Turbo S, 458 Italia, it will kill every RS and AMG.
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      03-28-2016, 09:59 PM   #14
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Quote:
Originally Posted by Twitch Massacre View Post
I don't recommend using launch control in the M6. I just don't think it's very effective. Better to just do an old fashion launch and feather the throttle as needed. I got my best 0-60 and 1/4 mile runs without LC. I know a couple of people that can keep the car in completely check on a full balls to the walls launch with LC but even they recommend the old fashioned way for speed and LC only for fun and fireworks.
I agree w/ Twitch on this one. LC in the M6 is a joke and I am not sure what the Bimmer Engineers were smoking when they came up with this. It doesn't react quick enough and the process you have to follow is terrible yielding terrible results.

Brian
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