Nissan 370Z Forum  

VDC quirks after UpRev

I'm not sure if this is psychological or real.... I have been noticing a distinct difference in engine behavior with the VDC program turned off compared to having it on.

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Engine & Drivetrain > Tuning

Reply
 
LinkBack Thread Tools Display Modes
Old 09-01-2011, 11:54 AM   #1 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default VDC quirks after UpRev

I'm not sure if this is psychological or real.... I have been noticing a distinct difference in engine behavior with the VDC program turned off compared to having it on. All of this after I got my ECU UpRev tune.

With the VDC turned on: No noticable engine knock, better torque "feel" at low (under 2k rpms) revs, no initial start-up knock.

With VDC turned off: a noticable engine knock at low rpms (under 1K), slight hestiation between 2000 to 2800 rpms, and a slight knock at initial cold start-up.

Someone tell me I'm crazy... or is this real?



(Serious responses only, please)
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
6MT is offline   Reply With Quote
Old 09-01-2011, 11:58 AM   #2 (permalink)
A True Z Fanatic
 
Red__Zed's Avatar
 
Join Date: Jul 2010
Location: window seat
Posts: 28,941
Drives: Mostly on two wheels
Rep Power: 116
Red__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond reputeRed__Zed has a reputation beyond repute
Default

Can you capture it on video?
Red__Zed is offline   Reply With Quote
Old 09-01-2011, 12:03 PM   #3 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default

Quote:
Originally Posted by Red__Zed View Post
Can you capture it on video?
Uhh.... not really.
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
6MT is offline   Reply With Quote
Old 09-01-2011, 12:05 PM   #4 (permalink)
A True Z Fanatic
 
Zat_Zuma's Avatar
 
Join Date: Nov 2008
Location: Edmonton, Alberta ...eh
Posts: 1,162
Drives: 2017 Touring auto
Rep Power: 15
Zat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of light
Default

Can you log on Cipher to see what the timing is doing and throttle position?
__________________
2017 370Z Touring Sport Auto
Been there; done that! Christ I'm old

Urethane mounts everywhere, Z1 Subframe bushings, FI LTH & Exhaust, Nismo diff, Volk GTF, Michelin PS4
Zat_Zuma is offline   Reply With Quote
Old 09-01-2011, 12:28 PM   #5 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default

Quote:
Originally Posted by Zat_Zuma View Post
Can you log on Cipher to see what the timing is doing and throttle position?
No, I didn't get the cable.

It's really not an issue. I find that the engine is perfect with the program on. I was just wondering if anyone else has noticed this. Since I mostly drove the car with the program turned off. But since the tune, I drive it with the program turned on.
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
6MT is offline   Reply With Quote
Old 09-01-2011, 12:30 PM   #6 (permalink)
A True Z Fanatic
 
Zat_Zuma's Avatar
 
Join Date: Nov 2008
Location: Edmonton, Alberta ...eh
Posts: 1,162
Drives: 2017 Touring auto
Rep Power: 15
Zat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of lightZat_Zuma is a glorious beacon of light
Default

Hmmm I wonder if my cable will allow us to log with Cipher? I'll check into that
__________________
2017 370Z Touring Sport Auto
Been there; done that! Christ I'm old

Urethane mounts everywhere, Z1 Subframe bushings, FI LTH & Exhaust, Nismo diff, Volk GTF, Michelin PS4
Zat_Zuma is offline   Reply With Quote
Old 09-01-2011, 01:02 PM   #7 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default

Quote:
Originally Posted by Zat_Zuma View Post
Hmmm I wonder if my cable will allow us to log with Cipher? I'll check into that
I don't think so. Your license is different than mine. And when the software seaches my VIN, it won't allow a different license to have access. (The license software is built into the cable.)
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
6MT is offline   Reply With Quote
Old 09-01-2011, 01:06 PM   #8 (permalink)
A True Z Fanatic
 
red6spd's Avatar
 
Join Date: Apr 2010
Location: Long Island NY
Posts: 3,277
Drives: 2010 Z Coupe M6 SPT
Rep Power: 17
red6spd is a jewel in the roughred6spd is a jewel in the roughred6spd is a jewel in the roughred6spd is a jewel in the rough
Default

Your Crazy!!!!!!!!!!! LOL J/k. I never had these issues but I do feel a difference with the VDC off in a good way. On I feel the car hold back more often almost like I'm losing traction when I should not be. I have even had VDC blink on my dash if I pop her down to like 3rd at highway speeds and punch it. I know I'm not losing traction just weird.
__________________
2010 Base+Sport 6spd: Stillen G3, FI Non-Resonated CBE, FI Non-Resonated Test Pipes, UpRev Tuned, Custom 24R Oil Cooler, JDM Rear Fog-OEM Harness.
???Whp ???WTQ (Will find out come spring time)
red6spd is offline   Reply With Quote
Old 09-01-2011, 01:08 PM   #9 (permalink)
A True Z Fanatic
 
birdmanx1's Avatar
 
Join Date: Jun 2010
Location: Baltimore, MD
Age: 92
Posts: 3,175
Drives: 370z Nismo
Rep Power: 20
birdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond reputebirdmanx1 has a reputation beyond repute
Send a message via MSN to birdmanx1
Default

Does the knock happen while on the aggressive map only? What happens when you switch to the normal UPrev map then turn VDC off. I'm planning on getting the tune done but wouldn't really want to deal with glitches or bug related to UPRev.
__________________
370Z NISMO #0462 | ClearBra | 3M tint | Head/Taillights | Dynamat | Black Roof | Tommy Kaira HB | CF Parts | Berk HFCs | FI SS | NST Pulleys | Takeda aFe | K&N | H&R Spacers | Swift Spec R | SPC F&R | Zuperman M370
Nismo Vid | Nismo Journal | Nismo Rumble
birdmanx1 is offline   Reply With Quote
Old 09-01-2011, 01:09 PM   #10 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default

Quote:
Originally Posted by red6spd View Post
Your Crazy!!!!!!!!!!! LOL J/k. I never had these issues but I do feel a difference with the VDC off in a good way. On I feel the car hold back more often almost like I'm losing traction when I should not be. I have even had VDC blink on my dash if I pop her down to like 3rd at highway speeds and punch it. I know I'm not losing traction just weird.
Me, I notice the opposite.

Yeah, I've noticed the wheel spin indicator lamp on the dash light up under a full-throttle burn too (with the program turned off). That's the abs sensor noticing a very slight (you'd never feel it) "wheel starting to spin" situation.
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D

Last edited by 6MT; 09-01-2011 at 01:11 PM.
6MT is offline   Reply With Quote
Old 09-01-2011, 01:35 PM   #11 (permalink)
Premium Member
 
wstar's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3581
wstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond repute
Default

If you've made changes to the tire diameters (new tires and/or wheels) that could affect VDC's sensitivity as well. But the engine knock / hesitation thing is troubling. Have you tried reflashing to stock and back again, and experimenting with both?
__________________
7AT Track Car!
Journal thread / Car setup details
wstar is offline   Reply With Quote
Old 09-01-2011, 01:43 PM   #12 (permalink)
Enthusiast Member
 
ChipsWithDips's Avatar
 
Join Date: Mar 2011
Location: Austin, TX
Posts: 279
Drives: '11 Gunmetal 370Z MT
Rep Power: 10
ChipsWithDips has a spectacular aura aboutChipsWithDips has a spectacular aura about
Default

Quote:
Originally Posted by 6MT View Post
I don't think so. Your license is different than mine. And when the software seaches my VIN, it won't allow a different license to have access. (The license software is built into the cable.)
License only matters for flashing, not logging.
ChipsWithDips is offline   Reply With Quote
Old 09-01-2011, 01:58 PM   #13 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default

Quote:
Originally Posted by wstar View Post
If you've made changes to the tire diameters (new tires and/or wheels) that could affect VDC's sensitivity as well. But the engine knock / hesitation thing is troubling. Have you tried reflashing to stock and back again, and experimenting with both?
Well, thanks for the ideas. But I'm not looking to "solve" this issue. The engine performs incredibly with the VDC on. I was asking if anyone else has encountered this (?). Re-flashing would ruin my tune and I'm not interested in starting over.

My question was; is anyone else noticing this issue with the VDC on/off?
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
6MT is offline   Reply With Quote
Old 09-01-2011, 02:13 PM   #14 (permalink)
6MT
A True Z Fanatic
 
6MT's Avatar
 
Join Date: May 2009
Location: ITU Zone 2
Posts: 22,460
Drives: Reliant Robin
Rep Power: 1786
6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute6MT has a reputation beyond repute
Default

Quote:
Originally Posted by birdmanx1 View Post
Does the knock happen while on the aggressive map only? What happens when you switch to the normal UPrev map then turn VDC off. I'm planning on getting the tune done but wouldn't really want to deal with glitches or bug related to UPRev.
I only had one map done and I cleared the OEM one. I didn't see any point in switching maps for the kind of driving I do.
__________________
Andrew

2009 370Z Sport/Touring 6MT sold
2013 Honda Civic Si coupe D/D
6MT is offline   Reply With Quote
Old 09-01-2011, 02:35 PM   #15 (permalink)
Premium Member
 
wstar's Avatar
 
Join Date: Mar 2009
Location: Houston, TX
Posts: 4,024
Drives: too slow
Rep Power: 3581
wstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond reputewstar has a reputation beyond repute
Default

Quote:
Originally Posted by 6MT View Post
Well, thanks for the ideas. But I'm not looking to "solve" this issue. The engine performs incredibly with the VDC on. I was asking if anyone else has encountered this (?). Re-flashing would ruin my tune and I'm not interested in starting over.

My question was; is anyone else noticing this issue with the VDC on/off?
VDC on/off shouldn't affect your engine one bit, when not in the process of slipping and correcting. By reflashing, I mean flash back to OEM, then flash back to the exact same flash you have now. UpRev or your tuner should have provided you with both flash files (a "back to OEM" flash, and your tuned flash, as files). You wouldn't need to start over, and it would eliminate the UpRev as the issue if VDC continues to do this on the OEM flash.
__________________
7AT Track Car!
Journal thread / Car setup details
wstar is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
S-Mode Quirks gmr19 Engine & Drivetrain 18 10-08-2013 11:04 AM
Need help with Uprev Megan370z Tuning 5 10-05-2012 08:18 AM
should I uprev? ggiwin Tuning 37 08-01-2011 09:17 AM
Uprev done! sojirovskensi Tuning 3 07-07-2011 02:45 AM
Dyno quirks - three cars with mods and no gains show on dyno, gotta be the heat! '10Anamoly Intake/Exhaust 25 07-26-2010 11:26 PM


All times are GMT -5. The time now is 05:58 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2