09-24-2020, 11:24 AM | #1 |
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G82 M4 Power to Weight Ratio & Performance Discussion Official Thread
Featured on BIMMERPOST.com Would appreciate some source checking but compared an F82 M4C RWD DCT compared to a G82 M4C RWD 8AT. While the sticker of the weight is huge...the relative increase in power makes up for it and is pretty impressive considering dynos have confirmed S58 to be even higher output in the X3M. I'm impressed that the G82 is pushing ratios close to a 718 GT4....can't wait to see the Nordschleife lap times. Last edited by Avaley; 10-25-2020 at 11:39 AM.. |
09-24-2020, 12:22 PM | #2 |
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I don't think your weights are correct for the F82 the F80 was 1635kg EU or 3597lbs the M4 was lighter than that.
Looking at BMW blogs numbers there is hardly any difference in the power/weight ratio: F80 DCT Comp = 450hp/1635kg = 275hp/tonne G80 DCT Comp = 510hp/1805kg = 282hp/tonne
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09-24-2020, 12:55 PM | #4 |
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F8X Competition wasn’t available at launch so many of us are at 425hp...
80 hp bump and 200 extra lbs. very similar to E46 vs E92. Last edited by solstice; 09-24-2020 at 01:00 PM.. |
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09-24-2020, 01:12 PM | #5 | |
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https://www.bmwusa.com/vehicles/4-se...-features.html |
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09-24-2020, 01:16 PM | #6 | |
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09-24-2020, 01:26 PM | #7 |
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https://x3.xbimmers.com/forums/showthread.php?t=1638381
Says 491 at the wheel on 89 octane for S58 X3M. https://f80.bimmerpost.com/forums/sh....php?t=1023743 https://f80.bimmerpost.com/forums/sh....php?t=1249883 Says 425 at the wheel 93 octane on a 2015 F80 M3 and 400 wheel, some inconsistencies on S55 dynos (someone please confirm a better source as these were the quickest ones I could find). Bootmod3 says will do 500 with a tune. https://www.protuningfreaks.com/prod...-m2competition This is before the huge headroom in the S58 with a simple ECU tune to push it to 600whp...same tune from PTF for the S58. https://www.protuningfreaks.com/coll...mpetition-tune |
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09-24-2020, 01:31 PM | #8 | |
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09-24-2020, 01:42 PM | #9 |
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The S58 is a big leap over the S55. It's a shame that the grille has taken all the attention because it's the engine that's going to make these cars special.
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09-24-2020, 02:05 PM | #10 | |
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Function > Form... i'm okay with the grille if it's aerodynamics and cooling are an improvement (which I presume is factual and obvious) and keeps IAT temps down. |
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09-24-2020, 02:35 PM | #11 | |
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I really don't care how it looks. Bigger grill = more air for cooling. And then complaints about a 3900lb car... and comments that instead they will get a 4400lb car because logic
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Last edited by SYT_Shadow; 09-24-2020 at 02:50 PM.. |
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09-24-2020, 02:53 PM | #12 |
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09-24-2020, 02:55 PM | #13 |
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More airflow is BS. The entire middle of the grill is blocked off, just like a normal bumper would be. It is basically traditional upper and lower grill sets, made to look like massive kidneys.
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09-24-2020, 02:57 PM | #14 |
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09-25-2020, 04:02 AM | #15 | |
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Last edited by Wills2; 09-30-2020 at 11:56 AM.. |
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09-25-2020, 04:48 AM | #16 |
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maybe M2 is going to be the new M4, F82 dimensions are OK.
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09-25-2020, 06:56 PM | #18 |
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But we can’t tune the S58 in the G8x ....
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Grey Matter:2008 E92 M3:608/425. SG/PS SOLD!
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09-25-2020, 08:29 PM | #19 |
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09-26-2020, 06:44 PM | #20 |
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Two quotes from Colin Chapman:
"Simplify, then add lightness." "Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere."
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09-30-2020, 08:00 AM | #21 | |
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09-30-2020, 08:10 AM | #22 |
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A few more data points, AM&S weighed their loaded M4C LCI at 1,644kg (3,624lbs) and Autobild their M4cs at 1,602kg (3,532lb), which yields the following power-to-weight ratios:
So given these data points, the G82C has a 5.7% advantage over the F82C and 1.0% over the M4cs, while the F82 M4cs has a 4.7% advantage over the F82 M4C. A 5.7% advantage is nothing to skuf at, but 1.0% is not enough to entice me to move.
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Porsche 911 turbo 2021 992 GT Silver
Previous cars: M4cs 2019 F82 Limerock Grey / M4 2015 F82 Silverstone / M3 2008 E92 Silverstone / M3 2002 E46 Carbon Black Last edited by CanAutM3; 09-30-2020 at 09:58 PM.. |
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