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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


View Poll Results: How do you downshift?
Nothing 16 10.39%
Rev Match Only 116 75.32%
Double clutch 22 14.29%
Voters: 154. You may not vote on this poll

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Old 08-28-2017, 04:11 PM   #71
Tcoat
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Old 08-28-2017, 04:54 PM   #72
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left paddle downshift... right paddle upshift...

wut iz a cluTCh?
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Old 08-28-2017, 04:57 PM   #73
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Quote:
Originally Posted by guybo View Post
Someone is going to have to explain to me how this will affect synchro wear at all. To get to the next gear- clutch once or twice it doesn't matter- you still have to row through the synchros. They don't just disappear because you hit the clutch an extra time. Rev matching (heel and toe shifting) will help the synchros in a small way, but double clutching- makes no sense at all
It makes no sense because you clearly have no idea what double clutching even is. You should look it up and learn something.
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Old 08-28-2017, 04:58 PM   #74
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Originally Posted by mav1178 View Post
Now please explain that to OP because his genius ass started this pointless thread.
The same goes for this idiot who agreed with the guy who doesn't know what double clutching even is.
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Old 08-28-2017, 05:30 PM   #75
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Originally Posted by LudwigMiles View Post
The same goes for this idiot who agreed with the guy who doesn't know what double clutching even is.
Sorry, I know what double clutching is.

I also know what it is not, namely it is not needed for a modern day transmission when you downshift.

Know what's funny? Professional racers don't double clutch, even in a 24 hour race.
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Old 08-28-2017, 05:54 PM   #76
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Quote:
Originally Posted by Tcoat View Post
There are maybe 3 confirmed cases on here where a synchro broke on a stock car. If you are double clutching up shifts you are doing it wrong. Really really wrong.


Make it 4. Had my tranny replaced a week and a half ago at 100% stock mechanically. (Was like that when I bought it a week beforehand)


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Old 08-28-2017, 10:04 PM   #77
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Originally Posted by LudwigMiles View Post
The same goes for this idiot who agreed with the guy who doesn't know what double clutching even is.
Osmium.
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Old 08-28-2017, 10:23 PM   #78
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Sometimes I quadruple shift, and my dog teeth grow back.
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Old 08-28-2017, 10:27 PM   #79
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If you double clutch downshifting from sixth to reverse, you'll unlock a hidden level.
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Old 08-28-2017, 10:50 PM   #80
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Quote:
Originally Posted by Cloud View Post
As someone who doesn't know a thing about transmissions, the only thing I understood in this thread were the F&F references.
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Originally Posted by extrashaky View Post
If you double clutch downshifting from sixth to reverse, you'll unlock a hidden level.
But your dog teeth are fucked.
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Old 08-29-2017, 12:00 AM   #81
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Your dog teeth will last much longer if you brush and floss them regularly.
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Old 08-29-2017, 07:56 AM   #82
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Has anyone used these on our cars yet? Do they work well?
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Old 08-29-2017, 09:09 AM   #83
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Quote:
Originally Posted by mnuttall View Post
This is backwards.

Rev matching will reduce wear on the clutch. Double clutching will reduce wear on the synchros (and the clutch). When you double clutch you also rev match so that the rotational speeds of the gear and the shaft are matched - result: no appreciable wear on the synchronizer rings when selecting the gear.
This is exactly what I do when I downshift since I heard it saves the synchros and reduce clutch wear....

Now I see people commenting on here saying it's not necessary...

Last time I tried rev matching, my shifter didn't go in correctly and started shaking until I moved it back into neutral

clutch, blip throttle, move lever... yeah that didn't go quite as well as I thought

I also like double clutching on the freeway when trying to pass someone, since I find it easier to just double clutch, rev up the RPM to the appropriate gear you want then just move the lever.

Last edited by IDFWU 420; 08-29-2017 at 09:20 AM.
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Old 08-29-2017, 09:22 AM   #84
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Double clutching:

It's a bit like buying a washer dryer machine and removing the clothes in between the wash and dry cycles. Because... that's what your granny used to do.
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