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> Shifting A Dog Ring Transmission
L69-Z28
post Nov 3 2012, 08:05 PM
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I have a new G-Force G5R transmission that I started using this summer. I have found the tranny likes lots of RPMs when using the clutchless upshifting. I'm able to do that pretty good but I have issues when trying to do a clutchless downshift. The clutchless downshifting was one of the reasons why I went with a dogring tranny because I'm not very good at heel-toe (rolling the foot). I now use the clutch everytime when down shifting (still trying to figure out the rpm match). I do shift the gears very quickly and the engine is only a 10.6:1 compression ratio.

I've talked with the manufacture regarding the downshifting. Anyone who uses a dogring tranny shed some light on how they do a clutchless downshift ??
Thanks,
Brian
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Shortcutsleeping
post Nov 4 2012, 11:38 PM
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Waiting as late as possible to downshift is the first step. I don't shift until a moment before I'm ready for the gas. This means I'm not downshifting and using the clutch to slow the car, this means during hard braking I'm solely focused on the braking and I'm much more consistent, and this means I'm not unnecessarily revving the motor which would mean more wear/heat. I'll jump from 4th to 2nd if the corner warrants it and never go to third. The last thing waiting so late does is that it means the rpms are down which means the rpm gap between gears is much smaller which means it is much easier to downshift smoothly. I am a left foot brake-er and I rarely use the clutch on downshift, but I'm typically at the slowest part of the corner so I'll only need a very slight blip on the throttle as the next gear down is selected. Since I'm going slower the chassis upset is less if I don't get it perfect, and really, in the next moment I'm planting the loud pedal to get out of the corner anyway, so I'm ready and positioned for it.

That's how I do it...works for me.

https://vimeo.com/50276092
Starts a little slow, but gets going at 3:25.
Jerico box.

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CrashTestDummy
post Nov 5 2012, 02:12 PM
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QUOTE (Shortcutsleeping @ Nov 4 2012, 05:38 PM) *
Waiting as late as possible to downshift is the first step. I don't shift until a moment before I'm ready for the gas. This means I'm not downshifting and using the clutch to slow the car, this means during hard braking I'm solely focused on the braking and I'm much more consistent, and this means I'm not unnecessarily revving the motor which would mean more wear/heat. I'll jump from 4th to 2nd if the corner warrants it and never go to third. The last thing waiting so late does is that it means the rpms are down which means the rpm gap between gears is much smaller which means it is much easier to downshift smoothly. I am a left foot brake-er and I rarely use the clutch on downshift, but I'm typically at the slowest part of the corner so I'll only need a very slight blip on the throttle as the next gear down is selected. Since I'm going slower the chassis upset is less if I don't get it perfect, and really, in the next moment I'm planting the loud pedal to get out of the corner anyway, so I'm ready and positioned for it.

That's how I do it...works for me.

https://vimeo.com/50276092
Starts a little slow, but gets going at 3:25.
Jerico box.

Costas
cars and such...



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Posts in this topic
L69-Z28   Shifting A Dog Ring Transmission   Nov 3 2012, 08:05 PM
StanIROCZ   There aren't too many on this forum with dog r...   Nov 4 2012, 01:24 AM
L69-Z28   QUOTE (StanIROCZ @ Nov 3 2012, 09:24 PM) ...   Nov 4 2012, 06:06 AM
ReEntryRacer   Stan's words: No clutch shifting sounds glamo...   Nov 4 2012, 06:57 AM
L69-Z28   QUOTE (ReEntryRacer @ Nov 4 2012, 01:57 A...   Nov 4 2012, 08:05 PM
Pony Exp.305   QUOTE (StanIROCZ @ Nov 3 2012, 08:24 PM) ...   Nov 22 2012, 03:56 PM
1meanZ   QUOTE (StanIROCZ @ Nov 3 2012, 08:24 PM) ...   Dec 11 2012, 05:20 PM
Shortcutsleeping   Waiting as late as possible to downshift is the fi...   Nov 4 2012, 11:38 PM
Steve91T   QUOTE (Shortcutsleeping @ Nov 4 2012, 06...   Nov 5 2012, 01:35 PM
CrashTestDummy   QUOTE (Shortcutsleeping @ Nov 4 2012, 05...   Nov 5 2012, 02:12 PM
Al weyman   I drove my mates 64 Mustang at Daytona last year a...   Nov 5 2012, 01:52 PM
dailydriver   I always thought it was mainly for strength, and s...   Nov 5 2012, 09:29 PM
Al weyman   You may well be right after I popped the slipper p...   Nov 5 2012, 10:12 PM
Doug Phillips   My protruck has an old T101. I am clutching on the...   Nov 6 2012, 12:44 PM
ReEntryRacer   Yes that looks like a GForce or Tex 4 speed, which...   Nov 22 2012, 05:51 PM

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