DOWNSHIFTING - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 09-15-2003, 06:49 PM
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ghead When I'm downshifting as in coming to a stop (by slowly releasing the clutch) is there any way that this can wear my clutch or put strain on my engine?
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#2 (permalink) Old 09-15-2003, 11:00 PM
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what i do is while i shift match the revs and let the clutch out. If you match revs you can take the clutch out fast and it will be real smooth as long as the rev was match correctly.

95 325conv with dinan chip, dinan cai, dinan throttle body, dinan exhaust, racing dynamics headers, uuc pulleys, uuc ssk, h&r springs, eibach swaybars, koni shocks, ap strut bar, bbs rsgt rims Soon to come 3.73 rear diff
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#3 (permalink) Old 09-16-2003, 05:17 PM
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DO NOT DO THIS!

this will destroy your clutch, your synchros, and perhaps your piston rings depending how aggresively you use this technique.

THIS IS WHY CARS HAVE BRAKES! THIS IS WHY BRAKESPADS ARE CHEAP TO REPLACE AND TRANSMISSIONS ARE NOT!

<span style='font-family:Geneva'><span style='font-size:14pt;line-height:100%'><span style='color:red'>Fox</span></span> <span style='color:gray'>the Pirate</span>
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I live my life one quarter mile at a time, and for those 23 or more seconds I'm free.
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#4 (permalink) Old 09-16-2003, 06:55 PM
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Quote:
Originally posted by Fox@Sep 16 2003, 05:57 PM
DO NOT DO THIS!

this will destroy your clutch, your synchros, and perhaps your piston rings depending how aggresively you use this technique.

THIS IS WHY CARS HAVE BRAKES! THIS IS WHY BRAKESPADS ARE CHEAP TO REPLACE AND TRANSMISSIONS ARE NOT!
What about if i match revs? Will this mess up my transmission?
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#5 (permalink) Old 09-16-2003, 07:40 PM
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downshifting is downshifting

Downshifting without rev matching is engine braking.

Basically its like trying to put a drill bit into a drill thats on full speed. Your gonna fuck somthin up

Besides why bother with engine braking when real brakes do a better job, and are cheaper to replace. engine braking seriously shortens the life of your clutch if nothing else. Why pay for a new clutch every 50k or less miles?

<span style='font-family:Geneva'><span style='font-size:14pt;line-height:100%'><span style='color:red'>Fox</span></span> <span style='color:gray'>the Pirate</span>
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I live my life one quarter mile at a time, and for those 23 or more seconds I'm free.
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#6 (permalink) Old 09-17-2003, 12:12 PM
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Engine braking is fine as long as you don't over do it, Plus don't encine brake lower than 3rd gear.

Had 95 M3, then 99 M3, then 01 M3,

Then I got married and bought a House.

Now I've got 89 325i and 96 328is both jet black two doors with 3 pedals.

BUT I'm working my way back up to the M.
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#7 (permalink) Old 09-17-2003, 02:17 PM
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Where is this information coming from??? How the hell would engine braking mess up synchros and piston rings? Do you even know what synchros do?

If you rev-match, there will be no adverse clutch wear.

THERE IS NOTHING WRONG WITH ENGINE BRAKING

<span style='font-size:8pt;line-height:100%'>James
'91 318is</span>
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#8 (permalink) Old 09-17-2003, 02:26 PM
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HA ha! So what did the nun do after you slapped her? :

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#9 (permalink) Old 09-17-2003, 05:17 PM
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i agree with fox for the most part. ive heard it can screw up the synchros, it does put wear the clutch if you dont rev match, and it could be really hard on the driveshaft if your rev match timing is off. there maybe nothing wrong with engine braking if you can execute the rev matches perfectly, but you dont gain anything out of it, thats the brakes job to slow the car down and they dont require or need any outside assistance.
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#10 (permalink) Old 09-17-2003, 06:55 PM
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Quote:
there maybe nothing wrong with engine braking if you can execute the rev matches perfectly
if you match revs its not engine braking but downshifting. Engine braking is when you pull the clutch out, let the engine idle down then down shift and slowly feather the clutch so its the resistence of the engine and the fly wheel that slows you down. So your actually burning the clutch as you do this.

<span style='font-family:Geneva'><span style='font-size:14pt;line-height:100%'><span style='color:red'>Fox</span></span> <span style='color:gray'>the Pirate</span>
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#11 (permalink) Old 09-17-2003, 07:50 PM
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downshifting without matching revs is worse that downshifting with matched revs, also known as heal-toe shifting.

If you are in solo events heal-toe will help the engine come to speed with the transmission and produces smoother downshifts, this is the only real time you need to heal toe downshift (when you are driving hard). I've gone to many solo schools and they teach you this technique as a better way of downshifting to go through turns faster.

downshifting of anykind will wear out your clutch, but if you want to think of it like that, everytime you shift gears you are putting wear on your clutch.

for example, in my friends old E21, the brake pedal is very close to the gas pedal, why do you think they did that? heal toe baby B)
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#12 (permalink) Old 09-17-2003, 10:58 PM
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Some of you guys really need to quit talking out of your asses.

<span style='font-size:8pt;line-height:100%'>James
'91 318is</span>
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#13 (permalink) Old 09-17-2003, 11:18 PM
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Quote:
Originally posted by m42technic@Sep 17 2003, 11:38 PM
Some of you guys really need to quit talking out of your asses.
no need to get all worked up
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#14 (permalink) Old 09-17-2003, 11:22 PM
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Quote:
Originally posted by MrM3+Sep 17 2003, 09:58 PM--></span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (MrM3 @ Sep 17 2003, 09:58 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-m42technic@Sep 17 2003, 11:38 PM
Some of you guys really need to quit talking out of your asses.
no need to get all worked up [/b][/quote]
It just bugs when theres incorrect information and lack of research being thrown around as actual information. ghead

<span style='font-size:8pt;line-height:100%'>James
'91 318is</span>
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#15 (permalink) Old 09-18-2003, 12:57 AM
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By the way - what are the symptoms of clutch wearing? I have 120k on mine - still shifts smooth on my opinion.
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