Downshifting on 7at and not jolting

Cuda1337 · 02-21-2012, 08:08 AM

This is probably a bit of a newb question, so I apologize. I was under the impression that with the 7at's the downshift rev match would blip to keep the downshifts smooth. Can this be turned on or off? I just got my Z the other day and when I downshift the RPM's spike up a little bit and the car jolts pretty aggressively. I've been trying to smooth out this while downshifting in manual mode, but haven't had a lot of success yet. Any suggestions? I thought the DRM feature was supposed to smooth this out for me?

flashburn · 02-21-2012, 08:18 AM

The higher the RPM's the more of a jolt your going to get. I don't think there is any way around that. Also, don't downshift into 1st, just let it do it if it needs to.

Cuda1337 · 02-21-2012, 08:20 AM

So how low should I let the RPM's go before I downshift?

flashburn · 02-21-2012, 08:28 AM

Depends on how smooth/aggressive you want to be. Generally if it's around 3,000rpm before you downshift, it should be pretty smooth.

poorazn · 02-21-2012, 08:30 AM

Quote:

Originally Posted by Cuda1337

This is probably a bit of a newb question, so I apologize. I was under the impression that with the 7at's the downshift rev match would blip to keep the downshifts smooth.

Your profile says you drive a 350z.... I believe SRM is only avail on a 370z

flashburn · 02-21-2012, 08:32 AM

He said he just got it the other day, so I assume he just hasn't updated his profile.

Cuda1337 · 02-21-2012, 08:33 AM

Quote:

Originally Posted by flashburn

He said he just got it the other day, so I assume he just hasn't updated his profile.

Exactly. I'll update now.

Cuda1337 · 02-21-2012, 08:34 AM

Quote:

Originally Posted by flashburn

Depends on how smooth/aggressive you want to be. Generally if it's around 3,000rpm before you downshift, it should be pretty smooth.

Hrmm, I'm trying to downshift now at around 2000 RPM's and I still jolt pretty badly.

flashburn · 02-21-2012, 08:46 AM

From what gear?

Cuda1337 · 02-21-2012, 08:49 AM

Quote:

Originally Posted by flashburn

From what gear?

Seems to happen in the 4-3-2 range the most. The higher gears its not nearly as prevalent.

flashburn · 02-21-2012, 08:51 AM

Hmm, I dunno, seems fine to me.

kenchan · 02-21-2012, 09:10 AM

try it by applying light throttle (slight blip with your throttle) when the lower gear engages.

flashburn · 02-21-2012, 09:24 AM

Should be no reason at all to need to do that with the 7AT to get smooth downshifts. I don't. It will already blip to revmatch anyway.

kenchan · 02-21-2012, 09:38 AM

Quote:

Originally Posted by flashburn

Should be no reason at all to need to do that with the 7AT to get smooth downshifts. I don't. It will already blip to revmatch anyway.

it was just a suggestion.

also SRM on MT isn't all that smooth at lower rpm with light braking. it is only smooth on moderate to aggressive braking/downshifts. so i tap the throttle to help rev match during light braking/downshift. might be the same on AT's.

Cuda1337 · 02-21-2012, 09:43 AM

You can't turn off the DRM right? It's always automatically supposed to work?

02-21-2012, 08:08 AM	#1 (permalink)
Cuda1337 Base Member Join Date: Oct 2011 Location: Florida Posts: 27 Drives: 09 370z 7at MB Rep Power: 14	Downshifting on 7at and not jolting This is probably a bit of a newb question, so I apologize. I was under the impression that with the 7at's the downshift rev match would blip to keep the downshifts smooth. Can this be turned on or off? I just got my Z the other day and when I downshift the RPM's spike up a little bit and the car jolts pretty aggressively. I've been trying to smooth out this while downshifting in manual mode, but haven't had a lot of success yet. Any suggestions? I thought the DRM feature was supposed to smooth this out for me?

02-21-2012, 08:18 AM	#2 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 20	The higher the RPM's the more of a jolt your going to get. I don't think there is any way around that. Also, don't downshift into 1st, just let it do it if it needs to. __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

02-21-2012, 08:28 AM	#4 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 20	Depends on how smooth/aggressive you want to be. Generally if it's around 3,000rpm before you downshift, it should be pretty smooth. __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

02-21-2012, 08:32 AM	#6 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 20	He said he just got it the other day, so I assume he just hasn't updated his profile. __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

02-21-2012, 08:46 AM	#9 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 20	From what gear? __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

02-21-2012, 08:20 AM	#3 (permalink)
Cuda1337 Base Member Join Date: Oct 2011 Location: Florida Posts: 27 Drives: 09 370z 7at MB Rep Power: 14	So how low should I let the RPM's go before I downshift?

02-21-2012, 08:51 AM	#11 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 20	Hmm, I dunno, seems fine to me. __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

02-21-2012, 09:10 AM	#12 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141522	try it by applying light throttle (slight blip with your throttle) when the lower gear engages.

02-21-2012, 09:24 AM	#13 (permalink)
flashburn A True Z Fanatic Join Date: May 2009 Location: Central Florida Posts: 1,884 Drives: '12 Corvette GS 6M Rep Power: 20	Should be no reason at all to need to do that with the 7AT to get smooth downshifts. I don't. It will already blip to revmatch anyway. __________________ Current Ride: 2012 Chevrolet Corvette Grand Sport Centennial Edition Carbon Flash 6M Previous Ride: 2009 Nissan 370Z Sport Platinum Graphite 7AT

02-21-2012, 09:43 AM	#15 (permalink)
Cuda1337 Base Member Join Date: Oct 2011 Location: Florida Posts: 27 Drives: 09 370z 7at MB Rep Power: 14	You can't turn off the DRM right? It's always automatically supposed to work?

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