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Thread: Article: Stock C6 Z06 versus stock F10 M5 highway roll on races - M5 wins? WTF?

              
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    F10 M5 vs C6Z, both stock



    can't confirm legitimacy of the video, but some food for thought

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    Stock C6 Z06 versus stock F10 M5 highway roll on races - M5 wins? WTF?

    This is a bit of a perplexing run video. What we have here is two cars claimed to be stock, A C6 Z06 and the new F10 M5. The two cars do several runs from a roll on the highway from speeds of 80 kilometers per hour (50 miles per hour). The Z06 is just over 1000 pounds lighter than the F10 M5. It does not give up a ton horsepower wise showing around ~450 wheel horsepower stock versus the F10 M5 which sits at about ~60 wheel horsepower more.

    Click here to enlarge

    So the F10 M5 makes more power but has another 1000 pounds to carry around. The F10 M5 has also lost to a stock P31 C63 AMG in a roll on race which weighs 700-800 pounds more than the Z06 and makes roughly 35 less horsepower at the wheels than the Z06. So, BimmerBoost is left scratching its head on this one.

    Even magazines routinely get ~125 miles per hour of the C6 Z06 in the 1/4 mile whereas the the M5 is in the ~120 range trap speed range meaning the C6 Z06 is favored from a roll, favored from a stop due to its weight, favored basically everywhere. The fastest 1/4 mile trap speed recorded for a stock F10 M5 is Car and Driver with a 122 mile per hour trap but Car and Driver got 126 for the Z06 so... these races make no sense.

    The Z06 simply has a much better power to weight ratio so why the result is what it is I have no clue. The M5 clearly pulls up top in multiple runs whether it gets the jump or not. Let's just hope F10 M5 owners don't start thinking their car is now a Z06 beater as this will no doubt inflate some egos. From the looks of things though the M6 may have a shot to at least make it a race against the C6 Z06 with how it has shown against the Nissan GTR recently.

    Video is below, you make sense of it.


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    Seems like the vette is starting in a higher gear. Look at the tach. He starts racing around 3k rpm. I bet if he started in a lower gear, he would pull on that M5 easier.
    John 3:16


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    Click here to enlarge Originally Posted by leo985i Click here to enlarge
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    Seems like the vette is starting in a higher gear. Look at the tach. He starts racing around 3k rpm. I bet if he started in a lower gear, he would pull on that M5 easier.
    He should be in second at that speed as if he is in first he will need to shift right away and would lose ground to the DCT I would think.

    I don't know if it is just a function of starting gear though as the M5 pulls the longer the race goes.

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    Or perhaps the weight on the Vette is hurting it. Don't mean to put him down but look at the driver's figure, plus he's also carrying a passenger. Who knows how big this passenger is too.
    John 3:16


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    Click here to enlarge Originally Posted by leo985i Click here to enlarge
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    Or perhaps the weight on the Vette is hurting it. Don't mean to put him down but look at the driver's figure, plus he's also carrying a passenger. Who knows how big this passenger is too.
    The passenger will affect the Z06 more as it will be a greater % of its weight but I mean these would have to be walruses for this to happen.

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    I'm sure that Z06 is carrying at least 500lbs in passanger weight, which would put it around 4800 pounds. But can this make that much difference? 5mph in the 1/4 mile is a lot!!! The only other explanation is the M5 being tuned. The Z06 could shift a little faster though.
    John 3:16


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    Click here to enlarge Originally Posted by leo985i Click here to enlarge
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    I'm sure that Z06 is carrying at least 500lbs in passanger weight, which would put it around 4800 pounds. But can this make that much difference? 5mph in the 1/4 mile is a lot!!! The only other explanation is the M5 being tuned. The Z06 could shift a little faster though.
    3800 pounds you mean. But the M5 has a passenger too although it has more power / torque to offset plus is heavier to begin with.

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    This is just my guess, who knows if it's accurate. I think at very high speeds, you aren't accelerating as hard (of course) as at lower speeds. In other words - at higher speeds, the impact of high mass doesn't have as much affect on acceleration as it would at lower speeds. The only other thing we have left (simplifying here) is wind resistance - which of course needs HP to get through. The power curve of the M5 is superior (making it's peak horsepower of 560 from 5750-7000 RPM) - and nearly no power loss between shifts from the DCT... I think that's the reason we are starting to see things like this, but hard to say for sure. This is one heavy car, and it's numbers so far haven't been too impressive.

    Even after all that (above) - I still am not understanding how a stock Z06 that we know traps around 125 is losing (albeit not badly) to a car we have repeatedly seen trap MUCH less.

    I like using this as a guide - and even here, it looks like the Z06 should have walked it everywhere. http://fastestlaps.com/cars/bmw_m5_f10.html ~ vs. ~ http://fastestlaps.com/cars/chevrolet_corvette_z06.html

    Here are the power curves stock for stock (c6 vs f10):

    Click here to enlarge
    Click here to enlarge

    Definitely weird results no matter how you think about it - that's for sure.

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    WOW

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    Put a dct in the vette or a MT in the M5 and it would be dead even. it looks like the M5 only makes on ground on the gearshifts.

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    No need for dct just a good driver!
    2009 FBO RB'd mtech e92 6AT - 11.3@126
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    m5 isn't tuned at all?

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    Reminds me of the M5board.com video. I don't doubt it. Roll racing is different than dig racing. The M5 is at a much better advantage. Boost vs NA, power under curve, low end torque, perfect gearing, great aero, and once rolling weight is less effective than from a dig. I could believe the M5 having the kind of power. However, this Z06 is definitely not one of the newer ones. The newer Z06's have definitely proven to be quicker than the older C6 Z06's. By newer I am talking 08+. Just watch some Z06 vs Z06 action and you will see.

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    Click here to enlarge Originally Posted by StinkyM Click here to enlarge
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    oost vs NA, power under curve, low end torque, perfect gearing, great aero, and once rolling weight is less effective than from a dig.
    Aerodynamics favor the vette though...

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    Its possible, two big guys, slow shifting, 7 year old car that might be a little beat up by now. Are you sure about the 08 plus being faster than the 06-07? That is news to me.

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    I suppose we are starting to see this kind of videos every day...until people get used to the fact that the new M5/M6's are no joke...Click here to enlarge

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    Click here to enlarge Originally Posted by cstavaru Click here to enlarge
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    I suppose we are starting to see this kind of videos every day...until people get used to the fact that the new M5/M6's are no joke...Click here to enlarge
    But it lost to a C63 AMG...

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
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    Aerodynamics favor the vette though...
    One would believe so but, .33 for the F10 M5 and .31 (sport autos figures) or .34 (GM's actual figures). Fairly close in comparison. Don't forget the Z06 has a massive frontal area.

    Click here to enlarge Originally Posted by Laloosh Click here to enlarge
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    Its possible, two big guys, slow shifting, 7 year old car that might be a little beat up by now. Are you sure about the 08 plus being faster than the 06-07? That is news to me.
    Yes, I am fairly certain. I hang around some very popular LSx forums and it's quite noticeable. I am talking bolt on vs stock and the stockers are still pulling the bolt on cars. I haven't cared to watch any dyno videos for more proof, but the videos I have seen with good drivers, the newer model always wins. Not to mention the track time differences. But, that's a whole different argument as there is a lot of suspension and tire differences.

    Click here to enlarge Originally Posted by Sticky Click here to enlarge
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    But it lost to a C63 AMG...
    My guess on some of those races is heat soak. We all know but have seem to forgotten that S63TU is prone to heat soak. Watch them in some of the other 1/2 mile roll races. Destroying bolt on E60 M5's that have beaten C63 AMG's.

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    Click here to enlarge Originally Posted by StinkyM Click here to enlarge
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    One would believe so but, .33 for the F10 M5 and .31 (sport autos figures) or .34 (GM's actual figures). Fairly close in comparison. Don't forget the Z06 has a massive frontal area.
    But the Vette is lower and has less frontal area compared to the 5-Series.

    Click here to enlarge Originally Posted by StinkyM Click here to enlarge
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    My guess on some of those races is heat soak. We all know but have seem to forgotten that S63TU is prone to heat soak. Watch them in some of the other 1/2 mile roll races. Destroying bolt on E60 M5's that have beaten C63 AMG's.
    Why no heat soak here after multiple runs? So why heat soak there on one run when you have to wait in line to run and it wasn't super hot?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
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    But it lost to a C63 AMG...
    Where is the video ? and was the C63 stock ? It would mean the C63 AMG would beat a 545hp Nissan GTR pretty bad...which I am not sure is the case.

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    Click here to enlarge Originally Posted by cstavaru Click here to enlarge
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    Where is the video ? and was the C63 stock ? It would mean the C63 AMG would beat a 545hp Nissan GTR pretty bad...which I am not sure is the case.
    It would be linked in the article... right there.

    Yes, the C63 was stock.

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    Yup it was a newer 2012+ C63 with the new MCT transmission which has proven itself stock(P31) to beat a pre 2012 c63 with the old auto and that pre 12 car had a tune/intake/and secondary cat delete. So dont discount the c 63 because it has showed what it can do head to head with these cars. Also the 2012+ c63 with P31 package is rated at 481 crank but dynos have showed it to be under rated its basically tuned from the factory.

    I raced a random z06 a few times from a down low roll and was putting lengths on this guy right of the bat and kept pulling (my car isnt stock ~480whp on a dynojet) but than when one of my boys set me up with a race against a guy with a z06 and the dude flat out knew how to drive his car and was walking me pretty good from a bunch of different speed rolls. High HP manual cars are very dependent on the driver

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    These knuckleheads shouldn't be playing in traffic! I don't give a f^ck if they kill themselves, but I do care if they hurt or kill somebody else!

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    anything can happen on the street...it's why bench racing like this is pointless (but I'm preaching to the choir; this is what car guys do now instead of racing...it's safer I guess for the egos)

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