shifting from 2nd in stand still - bad idea?

Push370zzz · 05-05-2015, 05:30 PM

Quote:

Originally Posted by kenchan

u can skip gears if u want. i dont want to wear out the syncro's prematurely so i go through gears sequentially, or if doing a skipped gear downshift, i would double-clutch it.

This does absolutely nothing on our transmission. You may as well "triple-clutch" and hum a quick tune after letting out the clutch in neutral a second time.

kenchan · 05-05-2015, 05:48 PM

Quote:

Originally Posted by Push370zzz

This does absolutely nothing on our transmission. You may as well "triple-clutch" and hum a quick tune after letting out the clutch in neutral a second time.

3-N-1 easier to enter gate

kenchan · 05-05-2015, 05:50 PM

but im thinking in my head cars without SRM..

mishuko · 05-06-2015, 07:49 AM

Quote:

Originally Posted by kenchan

3-N-1 easier to enter gate

let's say you're in 6th and drop to 4th... would you double clutch it?

Push370zzz · 05-06-2015, 10:17 AM

Quote:

Originally Posted by kenchan

3-N-1 easier to enter gate

onzedge · 05-06-2015, 10:20 AM

Quote:

Originally Posted by kenchan

but im thinking in my head cars without SRM..

Is it OK to go from 6th to 2nd at speed? I was wondering. I have SRM.

darkphantom · 05-06-2015, 10:21 AM

SRM here, so downshifting is no biggie, I usually go sequentially unless I'm coming to a stop/signal where I drop it in neutral.

However, going back to the question at hand - how would shifting from first to third or second to fourth affect the synchros?

TerribleONE · 05-06-2015, 10:34 AM

Granny shiftin not double clutchin like you should

JARblue · 05-06-2015, 11:04 AM

Quote:

Originally Posted by darkphantom

However, going back to the question at hand - how would shifting from first to third or second to fourth affect the synchros?

First, you need to understand how the synchros work. Google is your friend

Basically, you need to give it more time between shifts to allow the engine RPMs to drop to match the transmission speed. The synchros are designed to sync up one gear to the next when shifting sequentially. When you skip a gear, the synchros need more time before they are ready. If you enter the 3rd gear gate too quickly on a 1-3 shift, it will most likely grind. Even if it you don't hear it grind, you can feel a much rougher entry into the gate through the shifter even before you engage the clutch if you don't wait long enough. Some people just double clutch to give it that extra time.

GaleForce · 05-06-2015, 12:28 PM

Quote:

Originally Posted by TerribleONE

Granny shiftin not double clutchin like you should

jpkirk · 05-06-2015, 01:46 PM

I skip gears all the time, up and down shifting. I don't really see a problem skipping gears on the upshift if you are just cruising and not bangin' gears. Just make sure the rpm’s don’t go too far either way. Downshifting, I don't really care. If I can do a single downshift from say 5th to 3rd or 4th to 2nd when approaching a corner, remaining under redline of course, it results in more time with my hands on the wheel where they belong. From my understanding, on a full synchromesh transmission, gear speed within the transmission is sync'd to the shaft prior to engagement regardless of engine speed. While it does take time, it is fairly quick in modern transmissions. Syncing engine rpm to transmission rpm is primarily done to make sure car balance is not disturbed, causing loss of traction, especially on the down shift while approaching a corner at speed.

05-06-2015, 10:34 AM	#53 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5850	Granny shiftin not double clutchin like you should onzedge and GaleForce like this. __________________ 638WHP 541WTQ @ 13.5PSI Build thread

05-06-2015, 01:46 PM	#56 (permalink)
jpkirk A True Z Fanatic Join Date: Jun 2012 Location: Merry Land Posts: 5,515 Drives: '14 MidBlu ST MT Rep Power: 3376	I skip gears all the time, up and down shifting. I don't really see a problem skipping gears on the upshift if you are just cruising and not bangin' gears. Just make sure the rpm’s don’t go too far either way. Downshifting, I don't really care. If I can do a single downshift from say 5th to 3rd or 4th to 2nd when approaching a corner, remaining under redline of course, it results in more time with my hands on the wheel where they belong. From my understanding, on a full synchromesh transmission, gear speed within the transmission is sync'd to the shaft prior to engagement regardless of engine speed. While it does take time, it is fairly quick in modern transmissions. Syncing engine rpm to transmission rpm is primarily done to make sure car balance is not disturbed, causing loss of traction, especially on the down shift while approaching a corner at speed. carlitos_370z likes this. __________________ intake \| exhaust \| wheels \| tires \| suspension ... um ... stock, do speed stickers count? intake \| exhaust \| TE37 SL \| RE-11 \| suspension ... um ... do speed stickers count? Signature under construction

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05-05-2015, 05:50 PM	#48 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	but im thinking in my head cars without SRM..

05-06-2015, 10:21 AM	#52 (permalink)
darkphantom Enthusiast Member Join Date: Apr 2015 Location: Houston, Texas Posts: 425 Drives: 13 Z34 PW M6 Rep Power: 243	SRM here, so downshifting is no biggie, I usually go sequentially unless I'm coming to a stop/signal where I drop it in neutral. However, going back to the question at hand - how would shifting from first to third or second to fourth affect the synchros?