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07-22-2008, 08:06 PM | #1 |
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466bhp Chipped E92 M3
OK guys, after some time, I finally got a copy of the dyno for my chipped E92 M3, 466 bhp DIN and 338 lbs/ft of torque. Here is the dyno and pics (by the way, it does pull much harder and the difference is real):
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07-22-2008, 08:16 PM | #2 |
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It's a BEAST!
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07-22-2008, 08:31 PM | #3 |
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Wow, what a big improvement. How are your 1/4th mile times looking?
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07-22-2008, 08:32 PM | #4 |
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Wow, the torque curve is even flatter! Significant improvement at mid-range.
A few questions: 1. The list of drivetrain mods that were installed before the modded dyno run. 2. The "loss factor" entered into the dyno so that we can calculate whp and wtq. 3. When exactly the two runs were done? (dates and mileage on the car) 4. Ambient temp, pressure, humidity during the two runs? (we can figure this out from the dates and location if you don't have it) 5. Were the runs done on the same dyno? Many thanks for posting the info!
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07-22-2008, 08:45 PM | #5 |
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I would be interested in the mods.
Looking at the graphs I am sceptical at the equal lift of the Torque curve and hence power curve over stock ? It does look like the corrections are different for both graphs. I am not sure how your mods can lift the torque so consistently ? |
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07-22-2008, 09:00 PM | #6 | |
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Same dyno same day yes, the rest, I will find out.
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07-22-2008, 09:03 PM | #7 | |
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I read the tq numbers for the mod and stock cases as best as I can and calculated power based on those: Stock power torque rpm 276 290 5000 331 290 6000 393 295 7000 427 280 8000 Modified power torque rpm 314 330 5000 377 330 6000 433 325 7000 465 305 8000 The calculted power numbers match the one's on the chart.
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07-22-2008, 09:03 PM | #8 | |
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07-22-2008, 09:12 PM | #9 | |
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07-22-2008, 09:18 PM | #10 | |
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07-22-2008, 09:27 PM | #11 | |
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I remember porting crank cases in 911 engines they would show virtually no hp gains at 3,000 and 20hp + at 7,000 rpm it increased substantially with rpm (in this case it was not linear) For the pulleys I would of expected say 1-2 hp at 3,000 and maybe 6-8 at 8,000 ? Which I would be happy with ! Still confused by the low end gains BTW not sure what hp the air con consumes ? It might be worth doing a aircon on and aircon off bum dyno to see what the results are in feel |
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07-22-2008, 09:39 PM | #12 | |
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Hp = ( Tq x rpm ) / 5252 as long as Tq is measured in lb x ft So if the tq gains decrease, but the rpms increase, the power gains can be relatively stable, which is what is happening at higher rpms. At the low rpms, the same torque gain will yield less power gain simply because the rpms are low (as the equation indicates). You can read the tq values from the chart, plug them into the equation above, obtain power, and compare calculated values to values on chart, which is what I've done. The numbers match. The real question is the loss percentage entered into the dyno. I don't think he's done the pulleys. He's reflashed the ECU and installed the new exhaust. Those I know he did for sure. Anyway, he'll tell us and we'll know more. Different mods will yield different torque gains along the rpm range.
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07-22-2008, 09:42 PM | #13 | |
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07-22-2008, 10:58 PM | #15 |
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What software is it? I can't believe you're showing that much more power. I need that now.
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07-22-2008, 11:16 PM | #16 |
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This sounds almost too good to be true, that's a large bump from a chip, the motor is making about 116hp/liter...please be true.
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07-22-2008, 11:17 PM | #17 |
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yes give it to me
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07-23-2008, 08:40 AM | #21 |
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woah... looks great.
how was the install like? cheers
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07-23-2008, 10:55 AM | #22 | |||
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In general, I feel the car is much faster than it used to be right from the start, I do really enjoy driving it!! Quote:
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Yes, the MPG is a LOT WORSE than it was. Donīt really know by how much but since I am always steping on it (as I did before) the gass tank certainly lasts less. This is very consistent with what they said, I said I wanted power and did not care for fuel efficiency. They also increased the rev limiter a bit and well as delimited top speed. The reason the increased the rev limiter (to 8,500 RPM) is not because it will make more power, but because it helps make shifts at the limit a bit easier w/o harming the engine due to the quality of the local fuel. Not sure what you mean by this but it only took a day with the car there to due the ECU reflash, dyno and delivery the next day.
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Last edited by KonigsTiger; 07-23-2008 at 01:50 PM.. |
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