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-   -   downshifting from 5th gear staight to 3rd (http://www.maxbimmer.com/forums/showthread.php?t=95971)

tig 09-30-2007 02:51 PM

downshifting from 5th gear staight to 3rd
 
me and my buddy have been arguing about this for a while now. how bad is it to downshift from 5th gear staight to 3rd, i have done it a couple of times on the highway when i m down just under 100km/h at about 2.5rpm i find that if i drop it down to 3rd in my e36 328, it has greattt pickup engine revs up to about
3500 rpm and until about 6000rpm the car fliess, i have only done it a couple of times once when going up against a S4, i dont speed too much cuz i dont want my license getting suspended by these stupid new laws, anyways i know this cant me good for the engine i know anytime the engine revs too high its not good for it, but how bad is dropping straight to 3rd from 5th for the cars tanny? my buddy says its horrible for the car i say it cant be good but i dont think its horrible.

mirek 09-30-2007 03:18 PM

It's fine as long as you don't do it at 140km/h.

330DTM 09-30-2007 03:19 PM

If you want a smooth transition just rev match from 5th into 3rd (not hard to do). If you don't rev match, the transition won't be as smooth, especially if you're getting ready to 'run' against someone, cause you're going to feel the car jolt as you clutch out quickly (without rev matching).

Soldo 09-30-2007 03:20 PM

it's okay, but anytime you skip gears you'll put wear on your syncros.

v_bimmer 09-30-2007 03:55 PM

Quote:

Originally Posted by 328DTM (Post 1059953)
If you want a smooth transition just rev match from 5th into 3rd (not hard to do). If you don't rev match, the transition won't be as smooth, especially if you're getting ready to 'run' against someone, cause you're going to feel the car jolt as you clutch out quickly (without rev matching).

+++1

as long as you rev match and dont do it at a very high speed its fine!!! and about the engine reving high its fine, as long as you take good care of the engine!!! and its just a car, have fun with it!!

Dr. Flyview 09-30-2007 04:46 PM

Quote:

Originally Posted by Soldo (Post 1059954)
it's okay, but anytime you skip gears you'll put wear on your syncros.

Not if you double clutch with your rev-match. *th-up* And you put wear on your synchros with any downshift if you don't double clutch.

tig 09-30-2007 06:05 PM

Quote:

Originally Posted by Soldo (Post 1059954)
it's okay, but anytime you skip gears you'll put wear on your syncros.

thats exactly what i thought , ya gotta make sure to rev match other wise the shift is not smooth, thanx guys

JMW 09-30-2007 06:07 PM

Quote:

Originally Posted by Flav_cool (Post 1059968)
Not if you double clutch with your rev-match. *th-up* And you put wear on your synchros with any downshift if you don't double clutch.

we dont need to double clutch our cars...
tey are for tractor trailers and big rigs i believe with no synchros....
the line "not double clutchin like you should" in fast in the furious was a technical term to look cool...but u don need to do it..
i didnt think

Dr. Flyview 09-30-2007 06:16 PM

Quote:

Originally Posted by JMW (Post 1059991)
we dont need to double clutch our cars...
tey are for tractor trailers and big rigs i believe with no synchros....
the line "not double clutchin like you should" in fast in the furious was a technical term to look cool...but u don need to do it..
i didnt think

Look at what I wrote carefully. Synchros are made so you don't have to double clutch, but if you don't double clutch, you put wear on the synchros.

Soldo 09-30-2007 06:52 PM

Even if you double clutch your syncro's should still be working. Mind you, the wear you put on your syncros by going from 5th to 3rd isn't anything i'd be extremly worried about.

golden 09-30-2007 06:57 PM

i go from 5th to 3rd all the time.. nothing wrong with that, just rev match it

Axxe 09-30-2007 07:00 PM

Why double clutch? The synchro's still spin it up, as long as it's rev matched you're ok.

Boots R 09-30-2007 07:59 PM

I do it all the time when i'm going 180. I love the sound of valves popping.

dbworld4k 09-30-2007 08:17 PM

Quote:

Originally Posted by Boots R (Post 1060033)
I do it all the time when i'm going 180. I love the sound of valves popping.

LOL!

Meegis 09-30-2007 08:28 PM

You're all asking the wrong questions....



How did the S4 do?


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