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      10-19-2013, 03:28 AM   #23
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I have gone over an hour with it and no problems.
The driver is not rated longer than that
Me too. It's so good that I'm sold on DCT for every car I own now.
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      10-19-2013, 09:18 AM   #24
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Originally Posted by OC3 View Post
As far as adding (larger, aftermarket) heat exchangers go, the consensus seems to be that they don't prevent temp from skyrocketting. What they do is, once the temp shoots up, the temp will drop down rapidly in a mere half a lap of cool-down lap - enabling the driver to may be put in 2 or 3 more hot laps in that session. In comparison, I was envious of GT3's running 10 to 12 hot laps and the oil temp indicator steadily being at 220F or so during the entire time.
Larger DCT heat exchangers don't prevent your engine oil temp from skyrocketting? -They shouldn't. They should prevent the DCT from overheating/going into limp mode/short shifting or not downshifting by keeping the trans temps in check. If you want to keep the engine oil temps down, then you need to upgrade the engine oil cooler with a larger one for continuous tracking.

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As far as DCT being faster, at our non-professional, HPDE level, I don't know how beneficial it might be. Somebody mentioned that DCT is 2 seconds faster than 6MT, but perhaps he meant "if a DCT driver tries 6MT, he'll be 2 seconds slower than his DCT lap time"? If so, I say, tracking in 6MT and heel-and-toe'ing isn't no monumental achievement that's next-to-impossible to master. Nothing one can't get up to speed on by tracking 6MT for 5+ track days. The logic of some people...
I'd guess at a non-professional level, the difference between the non-pro and a pro would be greater in a 6MT than DCT. For 6MT vs. DCT in a pro-pro comparison, the shorter gear ratios and quicker upshifts would still result in a significant lap time benefit for a pro.

I would still love to back-to-back a stock DCT and 6MT and datalog it.
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      10-19-2013, 12:51 PM   #25
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No issues with track days including close to 100 summer at Summit Point.

Love the transmission, would never go back to a manual (yes it's that good).
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      10-19-2013, 02:23 PM   #26
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Just came in from session #3 at Chuckwalla (85F right now). Ran only 3 hot laps b4 temp gauge hot 285 >:I
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      10-19-2013, 02:25 PM   #27
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Quote:
Originally Posted by Billj747
Quote:
Originally Posted by OC3 View Post
As far as adding (larger, aftermarket) heat exchangers go, the consensus seems to be that they don't prevent temp from skyrocketting. What they do is, once the temp shoots up, the temp will drop down rapidly in a mere half a lap of cool-down lap - enabling the driver to may be put in 2 or 3 more hot laps in that session. In comparison, I was envious of GT3's running 10 to 12 hot laps and the oil temp indicator steadily being at 220F or so during the entire time.
Larger DCT heat exchangers don't prevent your engine oil temp from skyrocketting? -They shouldn't. They should prevent the DCT from overheating/going into limp mode/short shifting or not downshifting by keeping the trans temps in check. If you want to keep the engine oil temps down, then you need to upgrade the engine oil cooler with a larger one for continuous tracking.

Quote:
Originally Posted by OC3 View Post
As far as DCT being faster, at our non-professional, HPDE level, I don't know how beneficial it might be. Somebody mentioned that DCT is 2 seconds faster than 6MT, but perhaps he meant "if a DCT driver tries 6MT, he'll be 2 seconds slower than his DCT lap time"? If so, I say, tracking in 6MT and heel-and-toe'ing isn't no monumental achievement that's next-to-impossible to master. Nothing one can't get up to speed on by tracking 6MT for 5+ track days. The logic of some people...
I'd guess at a non-professional level, the difference between the non-pro and a pro would be greater in a 6MT than DCT. For 6MT vs. DCT in a pro-pro comparison, the shorter gear ratios and quicker upshifts would still result in a significant lap time benefit for a pro.

I would still love to back-to-back a stock DCT and 6MT and datalog it.
My car doesn't have any aftermarket heat exchanger. I was relaying what M3/DCT guys w/ such were saying
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      10-19-2013, 02:33 PM   #28
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so what i have gathered from all the post is dct is a great way to go...comes down to 3 pedals or 2....
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      10-19-2013, 05:43 PM   #29
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Update from Chuckwalla: ran session #5 by shifting less and, despite being about 5F hotter than the morning, temp gauge stayed at 255F. But, lap time was slower by around 1.5 sec
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      10-19-2013, 05:45 PM   #30
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Quote:
Originally Posted by OC3 View Post
My car doesn't have any aftermarket heat exchanger. I was relaying what M3/DCT guys w/ such were saying
Were you talking about other DCT guys' with a DCT heat exchanger?

Seriously, GET A LARGER ENGINE OIL COOLER!!! -so you can track your car without overheating the oil temps.
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      10-19-2013, 08:55 PM   #31
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Quote:
Originally Posted by Billj747 View Post
Were you talking about other DCT guys' with a DCT heat exchanger?

Seriously, GET A LARGER ENGINE OIL COOLER!!! -so you can track your car without overheating the oil temps.

Agree big time. My M24 oil cooler has dropped my oil temps on the track by 30F. The DCT has its own smaller cooler, but I haven't noticed any issues with mine, but I am not driving in the desert
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      10-19-2013, 09:12 PM   #32
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I would buy the DCT especially for track use.
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      10-20-2013, 11:13 AM   #33
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Quote:
Originally Posted by klammer
Love the DCT, no issues or "overheating" but did notice slow upshifts at times in extreme heat and late session, but that is all, no drop in redline/loss of power, and has not been frequent. Durable thus far
That's what I've experienced. The shifts will be noticeably slower leading up to a reduces redline if you stay on it.

I think DCT cars run hotter because it's much easier to keep the tach pinned at the redline. If you stay off the redline the n you'll have no issues.

But, I can get it really hot even in cooler weather if I give it a brutal thrashing.
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      10-20-2013, 06:47 PM   #34
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I have had no DCT issues in 20 minute track sessions. I have had both a 6mt and a DCT M3. They both have their pluses but I prefer DCT. The shift speed is amazing and I feel just as connected to the car running it in manual mode.
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      10-21-2013, 09:10 AM   #35
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Sat in a dct car around a few laps and holy shit it shifts fast. But i am not ever going to turn pro and manual is more fun. But listening to how fast the dct shifts was fun as hell too!

I think it will come down to - how long will the fun factor be there for when driving a dct.
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      10-21-2013, 11:24 AM   #36
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Quote:
Originally Posted by Billj747 View Post
I wouldn't hesitate. F1 cars and most modern Sports Car and Prototypes have paddleshifters.

As far as cooling goes, here's an upgraded heat exchanger:

http://ind-distribution.com/ind/cate...rmance/dkg-dct

And the thread on how it works:

http://www.m3post.com/forums/showthread.php?t=510178
Its hilarious what some companies charge for products for expensive cars. I could probably fabricate my own DCT cooler for less than 500 bucks.

I cant stop laughing at the price of $1,930.00 for a transmission cooler. And the funniest part is that people still buy them.
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      10-21-2013, 11:49 AM   #37
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Quote:
Originally Posted by pkim1079 View Post
Sat in a dct car around a few laps and holy shit it shifts fast. But i am not ever going to turn pro and manual is more fun. But listening to how fast the dct shifts was fun as hell too!

I think it will come down to - how long will the fun factor be there for when driving a dct.
IMO I like driving paddleshift race cars more than sequential race cars -which I like more than a traditional 3-pedal setup. But I still appreciate 3pedals and daily drive them in my other cars.

It's all personal preference.

Also FWIW - a lot of prototypes/modern GT racecars auto upshift, the driver only downshifts.

Quote:
Originally Posted by track_warrior View Post
Its hilarious what some companies charge for products for expensive cars. I could probably fabricate my own DCT cooler for less than 500 bucks.

I cant stop laughing at the price of $1,930.00 for a transmission cooler. And the funniest part is that people still buy them.
I agree but some people do not want to put the time in to looking into Setrab or PWR oil coolers, selecting a size, making or spec'ing the line lengths and piecing together their own setup -which could be even better than off the shelf stuff.
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      10-21-2013, 12:23 PM   #38
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I've driven both DCT and 6MT on the track and prefer the DCT on the track without hesitation. If you're racing it's a no brainer because the advantage of DCT equates to real time in a lap (on upshifts) and allows you to be more precise with trail braking because you're don't have to heal/toe. My car is a DD and I love 6MT on the street but if i did it over again I would go the DCT route.
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      10-21-2013, 12:50 PM   #39
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I've driven both DCT and 6MT on the track and prefer the DCT on the track without hesitation. If you're racing it's a no brainer because the advantage of DCT equates to real time in a lap (on upshifts) and allows you to be more precise with trail braking because you're don't have to heal/toe. My car is a DD and I love 6MT on the street but if i did it over again I would go the DCT route.
I would probably tooo - but then I would be bored driving everyday. its hard to rev loud sometimes when the car is always in gear
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      10-21-2013, 02:49 PM   #40
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Quote:
Originally Posted by Billj747 View Post
Were you talking about other DCT guys' with a DCT heat exchanger?

Seriously, GET A LARGER ENGINE OIL COOLER!!! -so you can track your car without overheating the oil temps.
Quote:
Originally Posted by track_warrior View Post
Its hilarious what some companies charge for products for expensive cars. I could probably fabricate my own DCT cooler for less than 500 bucks.

I cant stop laughing at the price of $1,930.00 for a transmission cooler. And the funniest part is that people still buy them.
I've considered set of larger heat exchangers (radiator, oil cooler, DCT cooler, power steering cooler, etc, did I miss anything else? lulz), but I'm just not all convinced that they're very effective. Cost, while laughably high, is secondary. Also, so far, I've stuck to not modify anything on my car other than the coilover & BBK that I currently have, I'm just not willing at this point to have shops take apart things in the engine bay, etc, to put those heat exchangers in. Compared to say S/C install, I know those things are relatively simple, but from what I've experienced so far at various so-called tuning shops that are around, I don't trust any of them.

Based on my little testing this past Saturday at Chuckwalla, on hot summer days, I'll just track by shifting less. I was amazed that the temp guage stayed at steady 255F when I shifted less, and was able to run 7~8 straight hot laps (which I wasn't able to since February of this year). Doing that got me slower lap times, but during hot summer months, nobody is setting any lap records anyways.
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      10-21-2013, 03:43 PM   #41
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Quote:
Originally Posted by OC3 View Post
I've considered set of larger heat exchangers (radiator, oil cooler, DCT cooler, power steering cooler, etc, did I miss anything else? lulz), but I'm just not all convinced that they're very effective. Cost, while laughably high, is secondary. Also, so far, I've stuck to not modify anything on my car other than the coilover & BBK that I currently have, I'm just not willing at this point to have shops take apart things in the engine bay, etc, to put those heat exchangers in. Compared to say S/C install, I know those things are relatively simple, but from what I've experienced so far at various so-called tuning shops that are around, I don't trust any of them.

Based on my little testing this past Saturday at Chuckwalla, on hot summer days, I'll just track by shifting less. I was amazed that the temp guage stayed at steady 255F when I shifted less, and was able to run 7~8 straight hot laps (which I wasn't able to since February of this year). Doing that got me slower lap times, but during hot summer months, nobody is setting any lap records anyways.
Seriously, fricken upgrade your engine oil cooler and you'll be so much happier. Not fun short-shifting and putting around...
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      10-21-2013, 04:37 PM   #42
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Quote:
Originally Posted by Billj747
Quote:
Originally Posted by OC3 View Post
I've considered set of larger heat exchangers (radiator, oil cooler, DCT cooler, power steering cooler, etc, did I miss anything else? lulz), but I'm just not all convinced that they're very effective. Cost, while laughably high, is secondary. Also, so far, I've stuck to not modify anything on my car other than the coilover & BBK that I currently have, I'm just not willing at this point to have shops take apart things in the engine bay, etc, to put those heat exchangers in. Compared to say S/C install, I know those things are relatively simple, but from what I've experienced so far at various so-called tuning shops that are around, I don't trust any of them.

Based on my little testing this past Saturday at Chuckwalla, on hot summer days, I'll just track by shifting less. I was amazed that the temp guage stayed at steady 255F when I shifted less, and was able to run 7~8 straight hot laps (which I wasn't able to since February of this year). Doing that got me slower lap times, but during hot summer months, nobody is setting any lap records anyways.
Seriously, fricken upgrade your engine oil cooler and you'll be so much happier. Not fun short-shifting and putting around...
One thing in the manual is that you do have to short shift on certain sections of a track - or am i doing it wrong?!
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      10-21-2013, 04:45 PM   #43
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6MT is better than DCT... wait, wrong thread? d'oh!

I'll probably break down and buy a DCT M4... especially given all the love for it here at the track.
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      10-21-2013, 06:06 PM   #44
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