Smoother shifts while redlining?

wdkwang · 02-21-2012, 02:09 PM

I bang through the gears frequently, and power shift when I race, and get the typical jolt through each gear. I heard that there is a way to smoothly go through each gear even at redline. Is this actually possible?

Also, does anyone else feel like the stock clutch kind of engages a little slow, particularly while cruising around?

kenchan · 02-21-2012, 02:12 PM

yes, it's about timing.

Nick911sc · 02-21-2012, 02:13 PM

I find if I'm shifting really fast with SRM off it's smooth as butter at or near redline... But with SRM it jolts. Just my experience, not sure if it's the same for anyone else.

christian370z · 02-21-2012, 02:13 PM

You have to slow down your shifts, just like how you would drive smoothly during normal driving.

wdkwang · 02-21-2012, 02:16 PM

Quote:

Originally Posted by christian370z

You have to slow down your shifts, just like how you would drive smoothly during normal driving.

i'm naturally trying to shift through each gear as quickly as possible under WOT. So you're saying to simply row through the gears slower? Won't I lose time doing that?

wdkwang · 02-21-2012, 02:17 PM

Quote:

Originally Posted by Nick911sc

I find if I'm shifting really fast with SRM off it's smooth as butter at or near redline... But with SRM it jolts. Just my experience, not sure if it's the same for anyone else.

let me try that today

kenchan · 02-21-2012, 02:17 PM

wdkwang there you go again blaming equipment vs technique.

christian370z · 02-21-2012, 02:29 PM

Quote:

Originally Posted by wdkwang

i'm naturally trying to shift through each gear as quickly as possible under WOT. So you're saying to simply row through the gears slower? Won't I lose time doing that?

Well, yeah lol. You asked for smooth shifts which requires slowing them down. If you just bang through the gears, there is nothing you can really do to smooth it out completely.

wdkwang · 02-21-2012, 02:40 PM

icic. i was just watching some pro track videos. these guys are straight up racing but the jolt doesn't seem very apparent with the in-car cameras.

@kenchan u know what i mean lawl. i know my technique isn't perfect but everyone notices how first gear engages a bit slow compared to other cars. i don't even understand why

Jeffblue · 02-21-2012, 02:40 PM

shifting at redline is inherently jolty. Think about it... you're going from putting down like 280whp, to 0whp during the shift back to 270whp when you shift at high rpms.

wdkwang · 02-21-2012, 03:16 PM

Quote:

Originally Posted by Jeffblue

shifting at redline is inherently jolty. Think about it... you're going from putting down like 280whp, to 0whp during the shift back to 270whp when you shift at high rpms.

yes but apparently it can be done

ZMan8 · 02-21-2012, 03:28 PM

Quote:

Originally Posted by wdkwang

icic. i was just watching some pro track videos. these guys are straight up racing but the jolt doesn't seem very apparent with the in-car cameras.

@kenchan u know what i mean lawl. i know my technique isn't perfect but everyone notices how first gear engages a bit slow compared to other cars. i don't even understand why

A lot of track/drag racers will burn their clutches though to save time. Especially at the drag strip, drivers looking for the fastest time ride the clutch pretty hard because they never let go of gas fully.

Basically when they need to shift they will drop from 100% engagement of gas pedal to about 50-60%( instead of fullly disengaging the gas to 0%) before hitting the clutch pedal.

This will allow for smoother and quicker shifts with less footwork involved. However, don't expect your clutch to hold up.

wdkwang · 02-21-2012, 03:32 PM

Quote:

Originally Posted by ZMan8

A lot of track/drag racers will burn their clutches though to save time. Especially at the drag strip, drivers looking for the fastest time ride the clutch pretty hard because they never let go of gas fully.

Basically when they need to shift they will drop from 100% engagement of gas pedal to about 50-60%( instead of fullly disengaging the gas to 0%) before hitting the clutch pedal.

This will allow for smoother and quicker shifts with less footwork involved. However, don't expect your clutch to hold up.

thank you

Jeffblue · 02-21-2012, 03:38 PM

Quote:

Originally Posted by wdkwang

yes but apparently it can be done

Theres a difference between jolty because of crappy shifting and jolty because of a ton of power all of a sudden being sent to the wheels.

In a GTR in R mode the shifts are are as hard as they will ever get in the car, however they are still smoother than a human can do in an MT, but you definitely can feel them despite being a DCT (Which is smoother than any human could possibly shift)

Jeffblue · 02-21-2012, 03:40 PM

Quote:

Originally Posted by wdkwang

icic. i was just watching some pro track videos. these guys are straight up racing but the jolt doesn't seem very apparent with the in-car cameras.

@kenchan u know what i mean lawl. i know my technique isn't perfect but everyone notices how first gear engages a bit slow compared to other cars. i don't even understand why

if you want to be able to shift faster then you need the revs to drop faster ( ie lightweight flywheel). one of the things i noticed in the 370z is how long the revs take to drop between shifts. from first to 2nd or 2nd to 3rd if you hit like 7k rpm and go to shift, in my head the jeopardy song comes on while i would wait for the revs to drop

02-21-2012, 02:09 PM	#1 (permalink)
wdkwang Track Member Join Date: Nov 2010 Location: N/A Posts: 899 Drives: slidewayz Rep Power: 21	Smoother shifts while redlining? I bang through the gears frequently, and power shift when I race, and get the typical jolt through each gear. I heard that there is a way to smoothly go through each gear even at redline. Is this actually possible? Also, does anyone else feel like the stock clutch kind of engages a little slow, particularly while cruising around? __________________ Powerhouse Amuse \| K&N Typhoon Intakes \| MotorDyne ART Pipes \| Borla Catback Exhaust \| B&M Short Shifter \| Intake Ducts \| Ichiba 25mm F/R Spacers \| Carbon Fiber Interior Vinyl Wrap \| Tints \| 10000k HIDs \| Vtak, yo! Last edited by wdkwang; 02-21-2012 at 02:14 PM.

02-21-2012, 02:13 PM	#4 (permalink)
christian370z A True Z Fanatic Join Date: Jul 2010 Location: Newport Beach Posts: 3,900 Drives: 2010 370Z/Saab 900se Rep Power: 433	You have to slow down your shifts, just like how you would drive smoothly during normal driving. __________________ -320whp / 259wftlbs- SP Rays -- RE-11s -- SpecialtyZ Tune -- Swift Springs -- Stillen 25R Oil Cooler -- Stillen G3 Intakes -- Berk HFCs -- F.I. 12" CBE -- Stillen Sway Bars -- Es14 Spring -- INGS+1 lip -- CF Spoiler -- GTR Start Button -- VLED Parking Lights -- PWJDM V2 shift knob

02-21-2012, 02:40 PM	#9 (permalink)
wdkwang Track Member Join Date: Nov 2010 Location: N/A Posts: 899 Drives: slidewayz Rep Power: 21	icic. i was just watching some pro track videos. these guys are straight up racing but the jolt doesn't seem very apparent with the in-car cameras. @kenchan u know what i mean lawl. i know my technique isn't perfect but everyone notices how first gear engages a bit slow compared to other cars. i don't even understand why __________________ Powerhouse Amuse \| K&N Typhoon Intakes \| MotorDyne ART Pipes \| Borla Catback Exhaust \| B&M Short Shifter \| Intake Ducts \| Ichiba 25mm F/R Spacers \| Carbon Fiber Interior Vinyl Wrap \| Tints \| 10000k HIDs \| Vtak, yo!

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02-21-2012, 02:12 PM	#2 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	yes, it's about timing.

02-21-2012, 02:13 PM	#3 (permalink)
Nick911sc A True Z Fanatic Join Date: Feb 2009 Location: Long Island, New York Posts: 1,698 Drives: 2010 Nissan GT-R Rep Power: 21	I find if I'm shifting really fast with SRM off it's smooth as butter at or near redline... But with SRM it jolts. Just my experience, not sure if it's the same for anyone else.

02-21-2012, 02:17 PM	#7 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	wdkwang there you go again blaming equipment vs technique.

02-21-2012, 02:40 PM	#10 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 37 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 38	shifting at redline is inherently jolty. Think about it... you're going from putting down like 280whp, to 0whp during the shift back to 270whp when you shift at high rpms.