moldowan

Went to the track in san antonio last night and ran with my buddys new M5 (V10).
He has unable to break 13's last time but yesterday ran a 12.94 as his best time. All in p500s/s6/trac.-off
I ran 12.82, It was hot (98' and VERY humid) here too.
Then we ran dfrom 60-150 on the way home. Interestingly enough the cls55 was able to keep up with him to about 100mph and at 150 he was 2-3 cars ahead of me. I was surprised at this as I would have thought the M5 would really make some distance to 150 on me? his spedo showed 165,mine 150 when we shut down-LOL
I wonder if my times are a bit slow (12.82) I know his are really slow for the M5 (I think). If we get winter weather in the mid 50's do you think i could bring my et to around 12.6???????
thanks,
Moldy

moldowan

oh yeah my car has 5k on the OD and his has 7K

C43AMG

Wow , does he have a chip in his (speedo 165) ?

TopGun32

humidity is bad for the 55k or 32k motor...

12.8's with that weather is pretty good...

lower temps and more dry air, you should be at the normal 12.4/12.5

what was the trap speeds for your run?


By the way.. only 3 cars down to 150 is not bad.

From a stop according to the published numbers the M5 has about 3.xx seconds advantage to 150, which equals many cars lenghts.

But the in the real world... from a roll.. you just proved it is much closer.

If you had a pulley and chip... I would put my money on you on the next race.

moldowan

trap speeds were kinda low, about 108-109mph, the m5 was 112

moldowan

no chip on the m5, just a crappy speedo

AndrewAZ

All BMW's have a speedometer error more noticeable than other brands such as MB ext. Speaking form the M3 many have gotten the stock one up to an indicated 172 mph which turns out to be 155 mph. And the general consensus on readings of 160-165 mph = going about 145-150mph. Only way to get accurate readings is to use GPS. Right now just from pacing with friends cars at an indicated 60mph I am really going about 57 compared to a chevy pickup truck and when I indicate 80 I am going about 76mph. So far all BMW seems to show faster than actual speed I like it and hate it, it probably has saved me from a few tickets.

Also I have heard that the limiter on the M3 doesnt kick in until 6th gear and you can go past 155mph in 5th. That might hold true for the M5 not having a limiter kick in until 7th.

lexlyf

Read this and was curious to know if your friend recently acquired his M5? I ask b/c if he did then I know that there is a break-in period on the M5. Once the break-in is achieved, the vehicle is returned to the BMW Dealer where they change the Ecu programming that untaps the full potential of the V10.

If this has no bearing, then I find this account highly interesting.

SLK55R

I doubt it was in break in ... the posted noted that the M5 had 7k miles already.

moldowan

I'll ask him if he has taken his m5 back after the 3k breakin period- good question to ask though

laj_e55

moldowan
pm'ed you

roy

AndrewAZ

I have heard a lot of these "break in" myths... When I rushed to get 1,500 miles on the M3 and take it to get service I asked my SA if I could now floor it to the full 8000K, he told me that the cars engines come pre broken in and it would do no harm if you redlined it from day one all they do at the 1,500 mile M3 break in service is change the oil and filter. I asked my sales guy about this since he has an M3 (He knows a lot about M3's and is not the average stupid sales guy I have known him for over 8 years, he also tracks them) and he told me the same thing that you dont have to follow break in and he floored his car form day 1 and told me most people who end up having trouble with the cars are the people who baby them.

If you think about it legally they cant limit what you do with the car after you buy it or deny it because you floored it from day 1 and if the car did need a break in period them a lot of people would have trouble. One reason they might have the sticker on the car is so people take it easy and get used to the car and dont run it into a tree the first week.

lexlyf

I can't speak on your so called myth. I read and hear what your saying, but I do know there was an actual ecu adjustment made to my friend's M5 @ the Dealer. The engine's characteristics between before and after were definitely noticeable. Is this level ground protocal for this specific model's powerplant? Who knows?

I'll forward this post so that the actual owner can chime in to confirm this. I can understand & respect your skepticism, but trust me...I wouldn't add my $.02 if I didn't felt more than confident in my own personal base of knowledge. I do read a lot of cases of "truth expansion" or out right fraud on these auto forum boards that legitimately build one's resistance.

vraa

Maybe the engine might be broken in, but what about the rest of the components?

AndrewAZ

I dont think you can flash the BMW ECU like you are thinking, I am almost positive they have to solder a new chip in. I do know that BMW does updates for certain things, last time I had the M in for service they put new SMG software on the car. But this is the first time I have heard about break in chip flashing to unlock the full power. Before we start a long argument or rant I think the break in procedure is up to what ever the person believes is good, some argue that you should redline the cars thus heating the engine up then let the engine cool then another round or redline let cool and repeat to break in the seals. Others say that is bad for the car and you should have low RPM and gradually increase.

rbc55

that break- in excuse is getting old ;especially at 7k miles.the cls 108 -109 trap speed is too far off even w/the heat.read my post on the e55 forum.(another M5 bites the dust) just ran one a couple of hours ago.and it was 94 degrees here at the time.

AndrewAZ

Fine how about SMG with US software sucks thats why we cant get good launches. The M3 is limited to 1,800 RPM LC vs euro of 3,500 RPM. I think the M5 is also limited to 1,800 in the US and euro is around 3,500 or more. And if you think that doesnt matter it does. I wish we could get LC to launch at 5,000 RPM that would help out a lot. Go check out the guy who launched his 6 speed at 5,500 and was running high 12's in his M3 faster than any magazine test got.

rbc55

what i was saying is that the M5 from a roll is still slow ,read my post in the e55 forum.

transferred

Never heard about redlining to warm up the engine. That be crazy. That's whay M-cars come with rev limit lights to try and keep peops below high rpms until engine is warm

AndrewAZ

Yea you dont redline it from cold... And the lights only show you the water temperature, I never go over 4,500 until my oil temp is up to running temp.

AndrewAZ

Eh... you should make some videos then... So far all I have seen are videos that show the M5 losing in the 1/4 mile then walking away from E55's above 120mph and quite fast.

transferred

Got ya. Was just confused by the earlier wording, i thought you meant some people redline from cold. It always happens that i pull out of my place and see a car i really want to run but have to wait five mins by which time they're long gone. such is life!

rbc55

i personally don't carry around a video recorder nor does any else.it was an unexpected encounter not a planned event.three cars at 140 mph from a 30 mph rolling start and you think the M5 is going to catch up,not happening until i hit the limiter.also,this is the second time i've hammered an e60 m5.

rbc55

those videos are doctored or the e got out of it after the quarter mile or it was a slow *** e to have it walked by an M5 like you state.ever been to the track and ran your car and got on the brakes harder at the end to exit at the first return road and have the car you ran against whip by to try and save face after getting his *** handed to him,thats what your seeing.appears like they are just pulling away ,which they are;not for the reason you think though!

E55_POWER

rbc55, have you dyno'ed your car? Your car seems aweful strong based on your experience. On the contrary my experience has been totally opposite but with more than 3 cars by 147ish from about 80MPH.

Yes, don't ask me why, but there is something funky done to the M5 after 1200 mile service...car is just different.

I've had my M6 for month and a half and feels the same as the M5 actually. Can't wait for the DC area MB guys to hit the track again...Derek, anyone?