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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-20-2017, 09:26 PM   #21
YoitsTmac
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If one additional person wants a video I will
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Old 04-20-2017, 10:37 PM   #22
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Originally Posted by Spannerhead View Post




How can you rev match a car when the engine and driveline are never disconnected? Rev matching by definition is manually synchronizing the engine and input shaft speed before clutch re-engagement.


I always revmatch the downshifts in my Auto E53 X5. It's much quicker to shift and smoother for the occupants+driveline.


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Old 04-20-2017, 10:48 PM   #23
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Your "rev matching" on the auto is most certainly not smoother for occupants. Modern autos are practically imperceptible.


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Old 04-20-2017, 10:51 PM   #24
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Yes i'm very confused by this.


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Old 04-20-2017, 11:41 PM   #25
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Originally Posted by YoitsTmac View Post
If one additional person wants a video I will
Ok fine! I want to see this too lol
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Old 04-21-2017, 12:11 AM   #26
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I know exactly what Tyler is talking about and I do it in my auto as well... it takes a lot of finesse to get the timing perfect so you get a smooth throttle blip. Not worth it to do most of the time unless I'm in a performance driving setting, and if you mess it up it just feels jerky like applying sharp throttle inputs in a lower gear at high speed.

And yes, I know that it's not actually "rev-matching" but it does help smoothen out and sometimes quicken the shifts. The whole process for rev-matching is much more intuitive in a true manual gearbox, albeit I'm not all that great at it either.
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Originally Posted by lingon300k View Post
[BMW Motors] Advertising has somehow convinced people that they're different. That they're made by magical Dachshunds who only eat special bratwursts made by virgins in an undisclosed magical spot inside of the black forest that can only be accessed via a special hydrogen powered BMW helicopter.

Last edited by hodgkinsc330ci; 04-21-2017 at 12:21 AM.
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Old 04-21-2017, 12:16 AM   #27
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Hmmm, in for video of double- clutching... a car without a clutch!

hee

t
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Old 04-21-2017, 12:23 AM   #28
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Hmmm, in for video of double- clutching... a car without a clutch!

hee

t
Rev-matching and double clutching are technically two different practices.
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Originally Posted by lingon300k View Post
[BMW Motors] Advertising has somehow convinced people that they're different. That they're made by magical Dachshunds who only eat special bratwursts made by virgins in an undisclosed magical spot inside of the black forest that can only be accessed via a special hydrogen powered BMW helicopter.
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Old 04-21-2017, 01:17 AM   #29
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Your "rev matching" on the auto is most certainly not smoother for occupants. Modern autos are practically imperceptible.


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Obviously it's not the same as rev matching in a manual transmission car.

Many steptronic automatics will jerk the car forward if you manually downshift in steptronic mode. It's similar to the type of jerk you get if you downshift a manual without rev matching. If you give a little bit of gas during the shift the Auto will do the manual downshift smoother and sometimes quicker (aka rev matching). At first getting the timing right is tricky, but I do it every time I drive an Auto in manual mode. It is definitely smoother. (Note: This only applies to automatics with manual mode while manually downshifting and doing it in drive is probably pointless.)

Maybe the new BMW's do the rev match for you but I know for sure the ZF in my X5 doesn't and many other automatics don't do it.

Just my 2. YMMV.


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Old 04-21-2017, 02:04 AM   #30
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I will do a video...maybe tomorrow. I don't have any classes or appointments
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Old 04-21-2017, 05:40 PM   #31
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you do have a manual transmission right
Yes
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Old 04-21-2017, 05:45 PM   #32
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Sorry for the wait guys. My catch can finally came in today even tho my maf has been here for a few thanks to one of the guys on the site so I havnt been able to throw it back together untill just now. The new maf did indeed fix the problem. i can heel toe again. Sounds a lot healthier now too and throttle response is back. So far so good.
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Old 04-21-2017, 07:37 PM   #33
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Sorry for the wait guys. My catch can finally came in today even tho my maf has been here for a few thanks to one of the guys on the site so I havnt been able to throw it back together untill just now. The new maf did indeed fix the problem. i can heel toe again. Sounds a lot healthier now too and throttle response is back. So far so good.
Good to hear! Sorry for our massive thread-jack...

In other words, I made a quick video today on the downshifts. Not perfect, and I bet Tyler will do a much better job if he uploads something. Making this video really reminds me that I need to do a full transmission fluid change.

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Originally Posted by lingon300k View Post
[BMW Motors] Advertising has somehow convinced people that they're different. That they're made by magical Dachshunds who only eat special bratwursts made by virgins in an undisclosed magical spot inside of the black forest that can only be accessed via a special hydrogen powered BMW helicopter.
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Old 04-21-2017, 10:26 PM   #34
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yea I'm glad it worked out. have only heard of the no heel toe thing a couple of times with no real solution posted with it. Also had done all the small stuff ( upper and lower Intake boots, valve cover gasket, oil cap, metal ecs f fitting, disa valve o ring and inspected, cleaned icv and tb and now the ecs catch can to do away with all the ccv issues) leading up to replacing the maf too with no change in the heel toe situation.
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Old 04-23-2017, 10:14 PM   #35
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Im curious in this cant do sit down burn outs ever since my MAF-less intake swap n tune


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Old 04-23-2017, 10:50 PM   #36
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its awkward to heel toe, i toe heel
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Old 04-24-2017, 07:14 AM   #37
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Im curious in this cant do sit down burn outs ever since my MAF-less intake swap n tune


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What's the purpose of a tune like that?


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