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      12-13-2011, 07:15 PM   #23
Fundahl
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Fundahl: Are you talking about Cobb tune on a 135i (which I agree is a great tune) or on a 1M? Just trying to understand what your comments are based on.
thx.

My bad, I forgot to change that section of my profile. I have a VO 1M, purchased from BMW of Corpus Christi. They held to their word and got me one at MSRP. I did have a deposit like six months in advance though.

My 1M was actually the one of the first Cobb in Austin used to find the torque limit code and re-write it.

Love the car, bigger step up from the feeling of my 135i M-Sport than I expected! Still a bit too quiet stock though, looking forward to getting catless turbo-back and setting up my Coolingmist meth/water kit.
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      12-14-2011, 01:30 PM   #24
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My bad, I forgot to change that section of my profile. I have a VO 1M, purchased from BMW of Corpus Christi. They held to their word and got me one at MSRP. I did have a deposit like six months in advance though.

My 1M was actually the one of the first Cobb in Austin used to find the torque limit code and re-write it.

Love the car, bigger step up from the feeling of my 135i M-Sport than I expected! Still a bit too quiet stock though, looking forward to getting catless turbo-back and setting up my Coolingmist meth/water kit.
Thanks and a late congrats on the 1M! I ran a Cobb tune on my 135i M-Sport with only PE and I loved it, been waiting for the 1M version, I think I may load the beta tune this weekend!
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      12-14-2011, 02:24 PM   #25
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Im a bit confused... why does the 135 Cobb show a ~30% gain in numbers but the M tune is under 10%?

I get the M is eating into the tune space of a 135 but 30% on top of 300 is 390 and 10% on top of 335 is 368.5. Shouldnt the M tune top out even with the 135 tune? What am I missing?
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      12-14-2011, 02:34 PM   #26
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Im a bit confused... why does the 135 Cobb show a ~30% gain in numbers but the M tune is under 10%?

I get the M is eating into the tune space of a 135 but 30% on top of 300 is 390 and 10% on top of 335 is 368.5. Shouldnt the M tune top out even with the 135 tune? What am I missing?
1M is already tuned. End result should be the same as it is the same power plant.
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      12-14-2011, 02:41 PM   #27
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1M is already tuned. End result should be the same as it is the same power plant.
Thanks, I get that, thats why I said it eats up into the tune space of the 135. That still doesnt account for the stated %age gains. Your argument supports my argument that the numbers should top out the same.
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      12-14-2011, 04:48 PM   #28
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1M is already tuned. End result should be the same as it is the same power plant.
Thanks, I get that, thats why I said it eats up into the tune space of the 135. That still doesnt account for the stated %age gains. Your argument supports my argument that the numbers should top out the same.
most 1M dyno at 350-360 hp stock
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      12-14-2011, 06:36 PM   #29
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i installed the tune earlier today. Car rips pretty good. Will drive it around more and report back but the tune feels great thus far.
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      12-14-2011, 07:04 PM   #30
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most 1M dyno at 350-360 hp stock
Thats closer thanks
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      12-14-2011, 07:06 PM   #31
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My 1M was the other car used for final tuning and testing at COBB in Austin. I've had this new AccessPORT tune on the car for about three weeks and it is a blast. Plenty of torque and a noticeable increase in HP as well. So far, no issues whatsoever with the tune.
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      12-14-2011, 07:40 PM   #32
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Thats closer thanks
Here is a couple independent dynos of 1Ms (stock and ess) on dynodynamics...

Skip to 1:00 and 2:00...

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      12-14-2011, 07:43 PM   #33
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Thanks for answering all those questions Fundahl!

The 1M from the factory has a pretty aggressive tune, so the gains aren't as big as the 135i and the overall power will be the same since they use the same engine. But, there is always room for a bit of improvement! At the top end of the power band, power is limited by the (under)size of the turbos.

Stock and Linear throttle maps are both available for the 1M.

Ian
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      12-15-2011, 10:42 AM   #34
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Thanks for answering all those questions Fundahl!

The 1M from the factory has a pretty aggressive tune, so the gains aren't as big as the 135i and the overall power will be the same since they use the same engine. But, there is always room for a bit of improvement! At the top end of the power band, power is limited by the (under)size of the turbos.

Stock and Linear throttle maps are both available for the 1M.

Ian
Ian, in your opinion, what would be the next best step for maximum power, besides meth/water injection, in a climate that averages 70F?

I'm guessing either intercooler or down-pipes.

Will the later 1M stages only come as you actually get modded ones on your dyne?
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      12-15-2011, 11:04 AM   #35
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Ian, in your opinion, what would be the next best step for maximum power, besides meth/water injection, in a climate that averages 70F?

I'm guessing either intercooler or down-pipes.

Will the later 1M stages only come as you actually get modded ones on your dyne?
My offline discussions with Rob have indicated that intercooler and catback exhaust would be the next best upgrades. Rob felt there was a restriction in the exhaust somewhere and it would be advised to do the catback before the downpipes.
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      12-15-2011, 11:29 AM   #36
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My offline discussions with Rob have indicated that intercooler and catback exhaust would be the next best upgrades. Rob felt there was a restriction in the exhaust somewhere and it would be advised to do the catback before the downpipes.
Interesting. I wonder if all the fancy curves and bends in the quad 1M rear-section is causing extra back-pressure vs a straight shot like some of the 135i exhausts.

I was planning on doing CP-E downpipes and resonated mids first, and then maybe the CP-E or Akra rear-section.

I wonder why Rob came to that conclusion. I remember in my time visiting them in Austin he said the Intercooler was probably the first piece, but that was based on his personal 335i experience. I know the 1M has an upgraded intercooler and radiator vs the other models. (besides "335is"?)
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      12-15-2011, 11:34 AM   #37
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Interesting. I wonder if all the fancy curves and bends in the quad 1M rear-section is causing extra back-pressure vs a straight shot like some of the 135i exhausts.

I was planning on doing CP-E downpipes and resonated mids first, and then maybe the CP-E or Akra rear-section.

I wonder why Rob came to that conclusion. I remember in my time visiting them in Austin he said the Intercooler was probably the first piece, but that was based on his personal 335i experience. I know the 1M has an upgraded intercooler and radiator vs the other models. (besides "335is"?)
The 1M has the same intercooler as the 135/335/335is. Berk Technologies said they gained 10HP on the dyno by changing out the stock 1M midpipes to their aftermarket option. I think I'm going to do a Helix IC and Berk Mid-Pipes on my 1M(along with an Accessport)..
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      12-15-2011, 12:04 PM   #38
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My offline discussions with Rob have indicated that intercooler and catback exhaust would be the next best upgrades. Rob felt there was a restriction in the exhaust somewhere and it would be advised to do the catback before the downpipes.
I had this same discussion, so I've ordered a cat-back system that should arrive later this month. I'll get the car back over to COBB to see if the dyno results change with the new exhaust. The restriction is just aft of the connecting flange that separates the resonator portion from the cat-back exhaust.
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      12-15-2011, 12:54 PM   #39
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The 1M has the same intercooler as the 135/335/335is. Berk Technologies said they gained 10HP on the dyno by changing out the stock 1M midpipes to their aftermarket option. I think I'm going to do a Helix IC and Berk Mid-Pipes on my 1M(along with an Accessport)..
That's what I plan to do first too. Already got the Mids, just waiting on the other pieces to find there way to me

After that I'll do the DPs and last will be the catback. Talking to one of the Cobb guys up here it sounds like they may be working on their own designed DPs. I'll wait for those to come out before deciding who to go with. If there really is a big restriction at the back end then maybe the plan will change.
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      12-15-2011, 01:46 PM   #40
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I may hold off on the mid pipes until I see Texas F1's results.. The intercooler is a no brainer in my opinion, stock IAT's are pretty high once you up the boost...
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      12-16-2011, 11:09 AM   #41
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Ian, in your opinion, what would be the next best step for maximum power, besides meth/water injection, in a climate that averages 70F?

I'm guessing either intercooler or down-pipes.

Will the later 1M stages only come as you actually get modded ones on your dyne?
In our testing on the 1 series, the catback and the FMIC are going to be the biggest restrictions to power.

Ian
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      12-29-2011, 03:01 PM   #42
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Installed my AP today - love the new low end response/torque- this is how the car should have come from the factory. Well done Cobb!
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      12-29-2011, 06:33 PM   #43
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My new Eisenmann cat back system arrived on Tuesday, was installed on Wednesday and I'm in the process of trying to get a dyno time at COBB next week to see the results. I'll update this thread when I have more info.
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      01-06-2012, 03:40 PM   #44
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I have some dyno results now after swapping the cat-back system. With the stock tune (prior to the AccessPORT), the car made 294 WHP (max), 381 ft-lb (max), at 13.95 PSI. With the AccessPORT stage 1 tune, max horsepower increased to 308 WHP, torque was 429 ft-lb (max), at 18.69 PSI. With the addition today of the Eisenmann race cat-back exhaust, figures were 324 WHP (max), 410 ft-lb (max), at 17.99 PSI.

Net effect of swapping the cat-back looks like it was an increase of 16 WHP, but a loss of peak torque. The torque curve actually improved; that is, the average torque across the dyno pull was higher, although it didn't spike as much around 2800 RPM as it had earlier. The power really picks up around 4,000 RPM and is sustained until redline. Car feels very strong with this setup.

I'll see if I can figure out a way to scan and post the actual report. Next project for the spring will likely be a FMIC.
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