VDC off I almost crashed!!

Rusty · 08-24-2018, 07:28 PM

Quote:

Originally Posted by BGTV8

Dude - this is what happens with an excess of torque and a shortage of ability.

Do yourself a favour and leave VDC on

You start with 2 buckets. A full bucket of luck and a empty bucket of experience. When the bucket of luck is empty. You hope the buck of experience is full. If not. You're in deep dodo.

shadow85 · 08-24-2018, 10:57 PM

Quote:

Originally Posted by jwick

You’re tuner should be giving you specific instructions for those data points (i.e. 3rd gear roll-on 3k-redline, etc). Is your tuner familiar with boosted VQs?

The quick jump in rpms you are referring to is when you lost traction. I’m surprised you didn’t redline it.

Quote:

Originally Posted by Hotrodz

This and if you are using Ecutek your tuner should be able to add over boost protection. Mine is set at 15 psi and will immediately retard my power and drop revs to 5000 rpms. I have had my Z over boost on more than one occasion due to a waste gate issue and never had it cause me to loose traction.

Sent from my SM-G965U using Tapatalk

Seb is my tuner. He said he has setup failsafes on my tune.

Quote:

Originally Posted by BGTV8

Dude - this is what happens with an excess of torque and a shortage of ability.

Do yourself a favour and leave VDC on

Not sure if you read my last post, but for remote tuning purposes I have to have VDC off, or it skews the logs.

redondoaveb · 08-25-2018, 12:27 AM

Quote:

Originally Posted by shadow85

Seb is my tuner. He said he has setup failsafes on my tune.

Not sure if you read my last post, but for remote tuning purposes I have to have VDC off, or it skews the logs.

Seb recommends the Greddy Profec, can't he help you set it up?

Optimiser · 08-25-2018, 01:05 AM

Quote:

Originally Posted by shadow85

I have a quaife diff and a TT setup

The other night, I tried a WOT pull for the first time with VDC off.

In the middle of the 3rd gear pull the car violently and suddenly spun to the right and then to the left before I made it come to a halt. It scared the **** out of me!

Anyone else experience this before?

Interesting.
I'm supercharged with 450whp and 364ft/lbs which comes on a lot earlier with the Si impeller upgrade I recently had done. I have the Cusco 1.5RS LSD which uses a clutch plate system rather than helical gears like the Quaife LSD has.
When the same situation has happened to me with VDC off and I've applied to much power in a straight line and I break traction, typically the back end of the car kicks out to the left and occasionally to the right. As soon as this happens I back right off the throttle and the rear of the car instantly kicks back to being straight again. The rear has never gone from left to right or visa versa and approaching a complete spin out.
I wonder if the Cusco clutch type as opposed to a helical gear type LSD assists with this?

Maybe I lifted off quicker...

Geoff-AU · 08-25-2018, 07:58 AM

Quote:

Originally Posted by shadow85

And yeah OK everyone is saying I have to learn to drive it better, feather into the pedal etc. But I am suppose to be taking WOT logs here for my remote tuning, I thought it has to be pelted down the whole time, no babying for the tuning purpose?

Oh well since your tuner who isn't there and doesn't know you from a bar of soap asked you to do a WOT pull with VDC off, you should probably listen to him without thinking if it's a good idea....

the very fact you're asking "hey my car suddenly went sideways and I almost crashed, what gives?" on a forum means you are in over your head.

jwick · 08-25-2018, 09:19 AM

Quote:

Originally Posted by Optimiser

Interesting.
I'm supercharged with 450whp and 364ft/lbs which comes on a lot earlier with the Si impeller upgrade I recently had done. I have the Cusco 1.5RS LSD which uses a clutch plate system rather than helical gears like the Quaife LSD has.
When the same situation has happened to me with VDC off and I've applied to much power in a straight line and I break traction, typically the back end of the car kicks out to the left and occasionally to the right. As soon as this happens I back right off the throttle and the rear of the car instantly kicks back to being straight again. The rear has never gone from left to right or visa versa and approaching a complete spin out.
I wonder if the Cusco clutch type as opposed to a helical gear type LSD assists with this?

Maybe I lifted off quicker...

Your SC setup doesn’t have the same torque curve as a turbo. It’s not even close. When the turbo spools up you literally get 250/300 extra ft-lbs in an instant.

shadow85 · 08-25-2018, 10:22 AM

Quote:

Originally Posted by Optimiser

Interesting.
I'm supercharged with 450whp and 364ft/lbs which comes on a lot earlier with the Si impeller upgrade I recently had done.

Quote:

Originally Posted by jwick

Your SC setup doesn’t have the same torque curve as a turbo. It’s not even close. When the turbo spools up you literally get 250/300 extra ft-lbs in an instant.

Jwick is rite. I am around the 840nm (620 ft•lb) engine torque according to my Ecutek logs, which is probably more closer to 620nm (450ft•lb) wheel torque @3500RPM

Quote:

Originally Posted by Geoff-AU

Oh well since your tuner who isn't there and doesn't know you from a bar of soap asked you to do a WOT pull with VDC off, you should probably listen to him without thinking if it's a good idea....

Well my tuner is one of the best for this platform if not the best. And after I told him what happend he updated with another tune for me to try, possibly one with better traction control? Not sure, havent tried it yet.

jwick · 08-25-2018, 11:18 AM

Seb is the man!

jwick · 08-25-2018, 11:25 AM

My original tune before I swapped exhausts was 500whp and 480wtq. Trust me the difference in just 40wtq is very noticeable when you get it all at once.

Everyone always boasts about HP but it’s torque, and when and how it comes on, that matters.

Spooler · 08-25-2018, 12:04 PM

Quote:

Originally Posted by jwick

Everyone always boasts about HP but it’s torque, and when and how it comes on, that matters.

Yeap, Seb can tune that part of it. I sure he made some adjustments for that.

DOOMMONKEY777 · 08-25-2018, 01:54 PM

Right, i actually crashed, and then had this same thing happened to me 3 more times, but those times i was aware of whats going on. Now to fix this you NEED to do is pull the VDC fuse in order to completely turn it off because it does this.

kevingalls · 08-25-2018, 02:20 PM

The other thing that helps is the experience so next time you’re ready with lightning reflexes.

Sent from my iPhone using Tapatalk

shadow85 · 08-25-2018, 08:33 PM

Guys, should i get the FUSE removed to completly disable VDC? Will this work out better or more safe for my WOT pulls with VDC off?

Do I need to tel Seb that I am going to remove it or will it not matter?

redondoaveb · 08-25-2018, 09:05 PM

Quote:

Originally Posted by shadow85

Guys, should i get the FUSE removed to completly disable VDC? Will this work out better or more safe for my WOT pulls with VDC off?

Do I need to tel Seb that I am going to remove it or will it not matter?

Definitely run it by Seb before you do it, he'll tell you if you should completely disable it for your tune.

Hotrodz · 08-25-2018, 10:44 PM

Quote:

Originally Posted by shadow85

Guys, should i get the FUSE removed to completly disable VDC? Will this work out better or more safe for my WOT pulls with VDC off?

Do I need to tel Seb that I am going to remove it or will it not matter?

You don't need to do the fuse removal or need to disable your ya sensor. The Ecutek works very well. Seb will make need adjustment as your throttle response may be to sensitive in that is it comes on hard and fast. He can adjust that so that response is slower.

08-25-2018, 11:18 AM	#38 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465056	Seb is the man! __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

08-25-2018, 11:25 AM	#39 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465056	My original tune before I swapped exhausts was 500whp and 480wtq. Trust me the difference in just 40wtq is very noticeable when you get it all at once. Everyone always boasts about HP but it’s torque, and when and how it comes on, that matters. Hotrodz and Jap**Vet* like this. __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

08-25-2018, 01:54 PM	#41 (permalink)
DOOMMONKEY777 A True Z Fanatic Join Date: Sep 2010 Location: Crooklyn Posts: 1,008 Drives: 370Z 6psd-sport-pkg Rep Power: 20	Right, i actually crashed, and then had this same thing happened to me 3 more times, but those times i was aware of whats going on. Now to fix this you NEED to do is pull the VDC fuse in order to completely turn it off because it does this. __________________ Kids don't do Drugs, Drugs are bad, so let the professional druggies do Drugs for you. 537whp/496lb/tq@8-9PSI 93 octane Last edited by DOOMMONKEY777; 08-25-2018 at 01:56 PM.

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08-25-2018, 02:20 PM	#42 (permalink)
kevingalls Base Member Join Date: May 2013 Location: Atlanta, GA Age: 42 Posts: 3 Drives: '10 370Z Silver M6 Rep Power: 11	The other thing that helps is the experience so next time you’re ready with lightning reflexes. Sent from my iPhone using Tapatalk

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