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08-06-2013, 10:54 PM | #1 |
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2008 E90 M3 - 6MT - AA Gen 2 Level 3 1991 Hot Girlfriend Last edited by DrakeKemper; 11-08-2014 at 11:54 PM.. |
08-06-2013, 11:07 PM | #2 |
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From what ive seen and read Pound For Pound of boost, ESS just makes more power, plain and simple.
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Perception and Reality are Two totally different Things.
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08-06-2013, 11:55 PM | #3 |
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08-07-2013, 12:28 AM | #4 | |
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While interesting and fun, comparing speedo's isn't 100% accurate anyway and you do bring up a good point, but really the only run that is questionable is the first one, the 2nd and 3rd are obvious outcomes. The runs start at 130KPH, the AA car is at ~120KPH when it goes WOT. If he started the comparo later at 140KPH I doubt it would change the outcome that much, either way they look fairly close in that first race.
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24 G82 Xdrive Comp
16 F82 M4 DCT - ZCP - JB4 - 556WHP / 570WTQ 08 ESS VT3-750 - 60-130MPH 6.14s - 10.81 @ 135.13 MPH 690WHP/463WTQ 08 E92 M3 - 1/2 Mile Trap Speed WR - 174.13 MPH |
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08-07-2013, 02:47 AM | #6 | ||
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08-07-2013, 02:51 AM | #7 |
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I just feel like thats like having two identical ferraris racing to 150, one starting at 80MPH, and one getting a run from zero accelerating through 80. The one freely accelerating will clearly win.
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08-07-2013, 09:03 AM | #8 | |||
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08-07-2013, 09:47 AM | #9 | |
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24 G82 Xdrive Comp
16 F82 M4 DCT - ZCP - JB4 - 556WHP / 570WTQ 08 ESS VT3-750 - 60-130MPH 6.14s - 10.81 @ 135.13 MPH 690WHP/463WTQ 08 E92 M3 - 1/2 Mile Trap Speed WR - 174.13 MPH |
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08-08-2013, 02:16 PM | #10 |
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Pretty poor comparison if you ask me but A for effort... A car acceleration for 30+ mph before hand has a clear advantage. Our driver did say a car came in his lane at the end there (high beam flash) and he let off for a sec which is why it stopped accelerating for a second at the end there.
Vbox or a good old fashion rolling race is the the only trustworthy way. Last edited by SflBimmer8484; 08-08-2013 at 02:31 PM.. |
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08-08-2013, 03:50 PM | #12 | |
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24 G82 Xdrive Comp
16 F82 M4 DCT - ZCP - JB4 - 556WHP / 570WTQ 08 ESS VT3-750 - 60-130MPH 6.14s - 10.81 @ 135.13 MPH 690WHP/463WTQ 08 E92 M3 - 1/2 Mile Trap Speed WR - 174.13 MPH |
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08-08-2013, 04:39 PM | #14 | |||
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The acceleration is the rate of change in velocity, and rate of change of velocity will be the determined by the sum of all forces. On one hand, you have the motor output giving a +force (influenced by air density, etc.). Other forces include road friction, wind resistance, slope, vehicle mass, rotating mass,etc. Momentum is just mass × velocity and is not a force acting on the car. Assuming you can keep everything constant except engine output,then the car under free acceleration shouldn't have anymore advantage than the other car which only started to accelerate 10-20 KPH sooner and is under same boost levels.I'm not a physics guy, but this is the way I understand it. Maybe one of the physics guys could chime in and explain if I'm right or wrong. Quote:
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BTW, I've actually done 60-130 vbox testing with rolling starts vs. "hitting the gas" @ ~50MPH. I wanted to see if the rolling start was faster or not than just punching it. I did the tests all on the same night and all on the same road with the same car. I've got to admit that my best 60-130 was from a rolling start, but it was by less than 1/10th of a second (0.010) -- which on a 6MT is no real difference at all. I have it all on video vbox so its easy to post and verify the results if requested. Assuming both cars have the same mass, on the same road road at same day/time,they effectively accelerate the same. |
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08-08-2013, 04:42 PM | #15 |
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WAIT. I dunno who has done this comparo, the first run is my car speedo.
VT2-600, 6.5 psi YES. but I don't know where the hell he got the 94 octane gas in my tank!! I was running pure 91 octane pump gas. MY CAR HAS ONLY DONE 504WHP ON A DYNOJET!!!!!!!!!!!!!!!!!!!!! NOT 550WHP as the op has stated!
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08-08-2013, 05:02 PM | #16 | |
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And that first run was against an AA stg3 claiming 600whp and you beat him. Your car is moving my friend |
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08-09-2013, 02:27 AM | #17 |
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08-09-2013, 08:52 AM | #18 | |
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A car dynoing 500 > beating the same car dynoing 580 with the same transmission makes absolutely no sense ... What ever makes you guys feel better about your purchase I guess. This video clearly shows the best comparison of both blowers at the same boost. Both cars running 6.5 psi and the same blower and Psi we use on our level 1 kit.. IMG its common sense that a car in motion will beat a car that is just starting to take off at the same speed. This is physics and does not take an equation to figure out. Try your theory on the street with a slower car flying by you and see how long it takes you to catch up. I'd wait for a real life scenario before claiming the winner. Last edited by SflBimmer8484; 08-09-2013 at 09:23 AM.. |
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08-09-2013, 10:12 AM | #19 | |
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Yes our kits even though made by a different company are very comparable since we use the same blower make the same boost and make very similar dyno graphs curves. Wait for a real race before jumping to conclusions. Its bound to happen eventually. Last edited by SflBimmer8484; 08-09-2013 at 10:43 AM.. |
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08-09-2013, 11:11 AM | #20 | |
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Here is the car in the video. 20' Bmw wheels and M5 brake |
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08-09-2013, 11:24 AM | #21 |
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I understand wanting both cars under boost. But I don't understand the argument about physics and acceleration. Acceleration will be determined by the sum of all forces acting on the car. I'm not aware of any force called "inertia of acceleration" or "momentum." Therefore previous acceleration does not influence the outcome. That's the physics.
But since being under boost does affect the outcome, if 130KPH (12KPH higher than where the car punched the gas) isn't enough to build boost, then what would be the proper amount. What starting speed would have been a better choice? Last edited by regular guy; 08-09-2013 at 11:32 AM.. |
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08-09-2013, 11:29 AM | #22 | |
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I keep checking the performance record list for M3's and I still see Vortech powered air /water cooled cars dominating. Until that changes and vendors can actually back up their claims with real records im sure we will continue to see vendors use "interesting marketing" to hype their superchargers TP. |
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