VDC not very intrusive?

kenchan · 03-14-2012, 12:54 PM

dang, we're still talking about this? lol...

alcheng · 03-14-2012, 01:01 PM

Quote:

Originally Posted by kenchan

dang, we're still talking about this? lol...

Cos they haven't turned off the VDC yet... you know what I mean Mr.kenchan

Dark Sarcasm · 03-14-2012, 03:40 PM

sorry, i havent read all 58 post to this point and here is my 2 cents.

with VDC on, if you try to accelerate hard and turn hard the VDC will shut you down and say nooooooo.

it feels to me, on long sweeping turns under hard acceleration that VDC will slightly cut power to keep things under control. Or maybe I dont try hard enough on the long sweepers.

_ace_ · 03-14-2012, 08:57 PM

I think it's fine on, but I hate the fact that the electronic system can't be turned 100% off. I know it's 'helping me' by causing my brakes to fake it as a differential, but it's my brakes, not a differential.

I wish VDC off was "Sport Mode" and ALL electronic throttle and brake oversight plus ABS ice mode disabled was "Off."

wstar · 03-14-2012, 11:56 PM

Quote:

Originally Posted by _ace_

"Sport Mode" and ALL electronic throttle"

If you have a 6MT car, and you don't mind the loss of Synchro-Rev-Match, you *can* disable all the electronic throttle interference via UpRev. There's a setting near the bottom of the config for "ETC off". You definitely lose SRM, and you probably also lose throttle rev limits (but I didn't test that), so you'd be on your own and then the hard fuel cut rev limits (normally there's a soft throttle rev limit before that). The throttle control is amazing though, it feels like an old school cable throttle again.

I couldn't keep it like that on my 7AT though, because the 7AT relies on SRM to shift smoothly. It's horribly and clunky with ETC off.

Jordo! · 03-15-2012, 12:00 AM

Quote:

Originally Posted by wstar

If you have a 6MT car, and you don't mind the loss of Synchro-Rev-Match, you *can* disable all the electronic throttle interference via UpRev. There's a setting near the bottom of the config for "ETC off". You definitely lose SRM, and you probably also lose throttle rev limits (but I didn't test that), so you'd be on your own and then the hard fuel cut rev limits (normally there's a soft throttle rev limit before that). The throttle control is amazing though, it feels like an old school cable throttle again.

I couldn't keep it like that on my 7AT though, because the 7AT relies on SRM to shift smoothly. It's horribly and clunky with ETC off.

Interesting -- with ETC off will it still automatically down shift if you drop to about 1.5 K RPM or no?

If so, I may try it -- that's my ONE complaint about the 7AT. I'd like it to hold the gear even if the revs drop, unless it's approaching idle.

_ace_ · 03-16-2012, 01:38 PM

Quote:

Originally Posted by wstar

If you have a 6MT car, and you don't mind the loss of Synchro-Rev-Match, you *can* disable all the electronic throttle interference via UpRev. There's a setting near the bottom of the config for "ETC off". You definitely lose SRM, and you probably also lose throttle rev limits (but I didn't test that), so you'd be on your own and then the hard fuel cut rev limits (normally there's a soft throttle rev limit before that). The throttle control is amazing though, it feels like an old school cable throttle again.

I couldn't keep it like that on my 7AT though, because the 7AT relies on SRM to shift smoothly. It's horribly and clunky with ETC off.

I would miss SRM as I find the Z's pedals a PITA to heel toe with, but that's great to know! I won't be doing much to the car until our finances change in about 2-3 years, but that just pushed an Uprev tune up a few notches on my list of what to get when.

Mike · 03-14-2012, 11:39 PM

Oh yeah, the fun thing in the vette. I ran non stock tire sizes for the track, square I think, but definitely shorter in back. With everything on, traction control would engage at 84 mph when the rears were spinning faster than they were supposed to compared to the fronts

Jordo! · 03-14-2012, 11:45 PM

There's a nice comparison of the VDC on the 350 vs the 370 on Australian Top Gear. Summary of review: Instills confidence in the driver rather than takes away control.

Of course, that is all relative.

Overall, I'd say if it doesn't feel intrusive, don't worry about it, and if it does, just switch it off

I leave mine on when in the rain or if just cruising from point A to B. I switch it off if I plan on playing with the car a bit.

BTW, VDC Off is OFF, but the wheel slip icon will still flash if you lose traction.

shaun66 · 03-14-2012, 11:56 PM

VDCyo

wstar · 03-15-2012, 12:03 AM

I didn't test the auto-downshift with ETC off, but in general ETC off + 7AT isn't a usable combination, I don't think. When you try to downshift it can't match right and goes all clunky. I only tried it for about a quarter mile then pulled over and re-programmed though. Maybe if I played with it more I could figure out whether you can match revs yourself with the 7AT in that mode, but I'm not sure how tricky the timing would be, given all the various internal bits engaging and disengaging on their own time and lagged from the button input.

Jordo! · 03-15-2012, 12:12 AM

Quote:

Originally Posted by wstar

I didn't test the auto-downshift with ETC off, but in general ETC off + 7AT isn't a usable combination, I don't think. When you try to downshift it can't match right and goes all clunky. I only tried it for about a quarter mile then pulled over and re-programmed though. Maybe if I played with it more I could figure out whether you can match revs yourself with the 7AT in that mode, but I'm not sure how tricky the timing would be, given all the various internal bits engaging and disengaging on their own time and lagged from the button input.

Hmm. I see -- if you do some more experimenting let me know

UNKNOWN_370 · 03-15-2012, 12:40 AM

How would you rev match without a clutch?

ImportConvert · 03-15-2012, 12:56 AM

Quote:

Originally Posted by UNKNOWN_370

How would you rev match without a clutch?

Automatics have clutches. Even ones with tq converters. Also, hydraulic lock-up is indeed following the same concept as a clutch, it's just viscous.

UNKNOWN_370 · 03-15-2012, 09:00 AM

Quote:

Originally Posted by ImportConvert

Automatics have clutches. Even ones with tq converters. Also, hydraulic lock-up is indeed following the same concept as a clutch, it's just viscous.

I understand that. But I mean functionally. If DRM is disabled or not working properly when VDC is off? And we need to blip the throttle with no manual clutch? How do we still achieve rev-matching manually without computer assistance? That's my question.

03-14-2012, 03:40 PM	#3 (permalink)
Dark Sarcasm Track Member Join Date: Dec 2010 Location: Katy Texas Posts: 552 Drives: 11 CTS-V Coupe Rep Power: 16	sorry, i havent read all 58 post to this point and here is my 2 cents. with VDC on, if you try to accelerate hard and turn hard the VDC will shut you down and say nooooooo. it feels to me, on long sweeping turns under hard acceleration that VDC will slightly cut power to keep things under control. Or maybe I dont try hard enough on the long sweepers. __________________ wax

03-14-2012, 11:39 PM	#8 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2186	Oh yeah, the fun thing in the vette. I ran non stock tire sizes for the track, square I think, but definitely shorter in back. With everything on, traction control would engage at 84 mph when the rears were spinning faster than they were supposed to compared to the fronts __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

03-14-2012, 11:45 PM	#9 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	There's a nice comparison of the VDC on the 350 vs the 370 on Australian Top Gear. Summary of review: Instills confidence in the driver rather than takes away control. Of course, that is all relative. Overall, I'd say if it doesn't feel intrusive, don't worry about it, and if it does, just switch it off I leave mine on when in the rain or if just cruising from point A to B. I switch it off if I plan on playing with the car a bit. BTW, VDC Off is OFF, but the wheel slip icon will still flash if you lose traction. __________________ Enjoy it. Destroy it.

03-15-2012, 12:03 AM	#11 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	I didn't test the auto-downshift with ETC off, but in general ETC off + 7AT isn't a usable combination, I don't think. When you try to downshift it can't match right and goes all clunky. I only tried it for about a quarter mile then pulled over and re-programmed though. Maybe if I played with it more I could figure out whether you can match revs yourself with the 7AT in that mode, but I'm not sure how tricky the timing would be, given all the various internal bits engaging and disengaging on their own time and lagged from the button input. __________________ 7AT Track Car! Journal thread / Car setup details

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03-14-2012, 12:54 PM	#1 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	dang, we're still talking about this? lol...

03-14-2012, 08:57 PM	#4 (permalink)
_ace_ Base Member Join Date: May 2011 Location: USA Posts: 140 Drives: 370Z Rep Power: 14	I think it's fine on, but I hate the fact that the electronic system can't be turned 100% off. I know it's 'helping me' by causing my brakes to fake it as a differential, but it's my brakes, not a differential. I wish VDC off was "Sport Mode" and ALL electronic throttle and brake oversight plus ABS ice mode disabled was "Off."

03-14-2012, 11:56 PM	#10 (permalink)
shaun66 Track Member Join Date: Mar 2010 Location: n Posts: 837 Drives: MB 370z 7AT Rep Power: 17	VDCyo

03-15-2012, 12:40 AM	#13 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14858	How would you rev match without a clutch?