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BMW 3-Series (E90 E92) Forum
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Cobb drag results
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04-26-2011, 10:03 PM | #1 |
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Cobb drag results
12.68 at 112.13
DCI/Cattles downpipes/exhaust/fmic Street tires 1/2 tank of 93 octane pump gas, no meth, no racegas. Car is a 135i 6mt with about 100 extra lbs of stuff in it. Suitcase/works gear/paperwork ect ect. I am 6'6 250, Figure the car was somewhere around 3700lbs if I had to guess. 3350 plus 250 plus 100. Cell phone picture of slip ![]() Log of the run ![]() Last edited by Clap135; 04-27-2011 at 04:03 PM.. |
04-26-2011, 10:19 PM | #6 | |
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This was done on street tires and about 100 extra.lbs of crap in the car as I am traveling and was bored stuck Btwn hotel rooms lol. As you can tell my lap top is dead and I didn't pack my power cord so later datalog analysis will have to wait.till friday. |
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04-26-2011, 10:32 PM | #8 |
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Lol I'm typing all this through my phone. Just a quick glance it looks like timing and af ratio is perfect. Boost is low but then again I'm not stock so it takes my car less boost to hit the same load. Comparing to boom who ran upwards of 16 psi to hit the load I think it did ok.
Da was about 1600 feet above sealevel so co.editions weren't the greatest |
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04-26-2011, 10:36 PM | #9 |
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Were you running meth?
112+ is pretty good for only 13.5-14 lbs of boost. It looks like you had some bog into 4th by how long it took boost to get up. That is typically what I see when I get bog. I've also noticed that when this happens timing in 4th never gets as high as it should. The same looks like it happened to you. I'd be willing to bet there is at least another mph in there without that little bog.
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04-26-2011, 10:39 PM | #10 |
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Timing is based on load. If u match up the rpms to timing in each gear you will see it is identical. Trust me there was no bog. What you are seeing is almost identical parameters in each gear only stretched out as it obviously takes more time the higher gear you hit.
No meth. Straight 93 |
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04-26-2011, 11:06 PM | #15 |
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they are not calculated. A flash tune doesn't bias widebands....it tells them what Target it wants just like the stock tune. I will trust stock (unfooled) widebands over aftermarket any given day.
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04-26-2011, 11:54 PM | #16 |
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looks good. I don't regret moving to cobb from procede. I feel alot safer running this tune. When I dynoed with procede( outside temp 70) the car and the cats got so hot. But with the cobb( outside temp 87) the car and cats seemed to be much cooler.
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04-26-2011, 11:59 PM | #17 | |
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By giving up 42whp, you don't generate as much heat. So there is no question that there is less engine stress in your specific case. But along those lines, the least stressful tune is stock. |
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04-27-2011, 12:11 AM | #20 |
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He does have a valid point though. Bet your ass my car's running much hotter at 17 psi than it does at 14.
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04-27-2011, 12:13 AM | #21 |
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So how do they get AFR values if theyre not calculated? I don't get that part..I know flashes don't bias them but that wasn't my question
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04-27-2011, 12:22 AM | #22 | |
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