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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > USA - Rockies / Midwest > Bandimere Results - 07APR12



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      04-07-2012, 05:44 PM   #1
Carl Morris
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Bandimere Results - 07APR12

Since we've been talking about Bandimere this spring, I thought I'd share my results from the Boulder Nissan private track day that was there today. As always it was totally worth the $80 to me to be able to run whenever I felt like it with no lines. I didn't make that many passes, but I achieved my goals for stock hardware.

First run was bone stock, after that I tried a few different Cobb maps and my best time was on Stage1+FMIC 4.01 that I've been using on the street for a few weeks. The launching was a bit tricky, but it could have been worse. I thought DTC would work OK...it did stock. But as I turned up the boost it was causing me to bog so I had to turn the traction control completely off. I gave up on trying to get any more out of it when it was obvious that I wasn't going to run a 12.9 no matter how hard I abused it and the drivetrain didn't seem to like spinning the tires harder. Too much hopping and clunking as power shifted between tires. Since the only really notable runs are the bone stock one and the fastest one, I'll put those in the reply...

Edit: Keep in mind that all runs are at 5800+ft elevation. The weather was nice and cool, though. 50s-60s.
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      04-07-2012, 05:44 PM   #2
Carl Morris
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Last edited by Carl Morris; 04-07-2012 at 06:37 PM.
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      04-07-2012, 06:38 PM   #3
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Stock (Cobb Stage 0) Log
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      04-07-2012, 06:39 PM   #4
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Stage1+FMIC log. No, I don't actually have an FMIC but I was running 20% E85. It appears from the log that I was getting timing pulled.
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      04-07-2012, 06:50 PM   #5
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According to a standard horsepower calculator based on weight (in this case 4005 lbs as raced) I picked up about an average of 38hp with the Cobb and no hardware. Obviously that would have been higher if I weren't getting timing pulled in 3rd and 4th gear.

Apparently I either need more E85, and/or a real FMIC, or there is some other issue.
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      04-07-2012, 07:41 PM   #6
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Looks like a perfect day for it, good runs also, they seem inline with other similarly modded 335's up here. Hopefully next Sat will have similar weather.

I'm no expert at reading Cobb logs, but can see the boost tapering, I usually shift at 5500 or 6K as the power really seems to fall off at higher rpm up here. I bet it's tough launching a MT xi too.
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Best 1/4 time = 12.975 @ 107.15, 1.763 60' at Bandimere Speedway (5800' above sea level)
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      04-07-2012, 08:11 PM   #7
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It was a really nice day. I was really psyched to hit 13.9@98 stock, I thought I might only be running 95-96mph which would have made it almost impossible. Turns out the car runs faster stock than I gave it credit for even with the AWD.

The 6MT AWD was a bit tricky to launch, but I do have a ton of experience in that area with laggy turbo cars. I just need a 2-stage and Cobb isn't close to delivering one yet.
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      04-07-2012, 08:33 PM   #8
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Nice, not bad times at all.
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      04-07-2012, 10:05 PM   #9
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Good times. I wish I could have gone.
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Best 1/4 time = 13.6 @ 106.6 (with JB3) at Bandimere Speedway (5800' above sea level)
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      04-08-2012, 09:40 PM   #10
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      04-09-2012, 10:13 AM   #11
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Looks fun, nice runs!
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      04-09-2012, 03:30 PM   #12
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Nice runs, those 60' times look pretty good, especially for MT!

What tires are you running?

Looks like you were getting timing drops, even on the Stock map, unless that was a throttle closure (DTC) event? Stage 1+ map logs look decent.
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      04-09-2012, 03:34 PM   #13
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Tires are Michelin all seasons, non-runflats.

I'm new to reading Cobb logs (and I have much more detailed info if anybody is interested) but my interpretation was that the timing was normal in the stock map and retarded about 3 degrees in 3rd and 4th gear on the Stage1+ map. I assume that was due to heat soak of the stock intercooler and not enough E85 to prevent a detonation event. I did not log engine or air charge temps and I'll need to start doing that.
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      04-10-2012, 09:56 AM   #14
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Great runs on all-sleazy tires.
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      04-10-2012, 10:33 AM   #15
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I've had good experience with all seasons on AWD cars. It's not like you can heat them up like the RWD guys can.
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      04-21-2012, 03:21 PM   #16
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Just to follow up one more time on this, took it to the dyno for some baseline runs in the same trim. On the stock map made 218awhp uncorrected and on Stage1+FMIC the same way I ran the 13.4@102 I made 252awhp uncorrected.

http://www.facebook.com/v/3623754988485
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      04-23-2012, 03:12 PM   #17
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Different days? If so, then uncorrected won't tell you a whole lot, you need to use STD or SAE corrected to normalize them to the conditions. This forum seems to like STD for comparison sake, but it doesn't really matter for you.
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      04-23-2012, 03:18 PM   #18
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I have the atmospheric data and can correct if I need to. I find that corrected data misleads people about their cars more often than uncorrected data. The dyno shop normally just uses 15% all the time due to the confusion that using full STD/SAE correction factors causes on turbo motors. Yes, it gives you nice big numbers, but you won't actually make that much at sea level with a turbo motor unless your turbo was totally maxed out on the dyno at high elevation.
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      04-23-2012, 05:30 PM   #19
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Just sayin, uncorrected doesn't take into account the different humidity, temps, and barometric pressure that might have been present on one day vs. another. So if you went in on a cold day, and then another on a hot humid (probably not humid in CO) day, your #'s could be skewed when comparing one day to another. Wasn't referencing whether the #'s seem low or high (they look fine), just that STD/SAE help equalize them out for the different conditions on different days. Though you are right, on a turbo, intercooled car, it isn't going to make as much of a difference, and they probably will be skewed high, as we have seen on others who have dyno'd (Forza).

If you dyno'd on the same day relatively close to each other, then it wouldn't really matter, or if they really try and keep the same conditions in the dyno bay, which isn't usually the case.

Decent gains regardless though.
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      04-23-2012, 06:33 PM   #20
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Here are some results All uncorrected. I can show the corrected but they make no sense because Mac uses 25% correction factor even on FI and that is just incorrect for Denver.

Baseline,
SSTT only
& Procede, CLDP's, Intercooler
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