VDC off I almost crashed!!

redondoaveb · 08-24-2018, 12:41 PM

Quote:

Originally Posted by Spooler

Ah, this sounded like fun. I need something like this to happen to get my adrenaline up. Not to worry, I am working on it.

Oh, it's going to happen (especially with your build), and it definitely get's your adrenaline up. But, I'm sure you already knew that.

jwick · 08-24-2018, 01:16 PM

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.

Hotrodz · 08-24-2018, 05:59 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.

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

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?

theDreamer · 08-24-2018, 02:25 PM

JARblue · 08-24-2018, 04:08 PM

I bought the Z through a local dealer from another dealer and had to wait for delivery. In the week I waited, the dealer gave me a loaner Z that had essentially bald tires. One moderate throttle application mid-turn and I was slideways back and forth within inches of the curb multiple times. Without prior experience I would have had no shot at recovering, and it was still unexpected and scary as $hit. While I made sure to let the dealership have a piece of my mind for giving me a sports car with tires with 3/32" tread remaining, it was definitely a lesson that was reinforced hard: respect the powah.

With improper throttle application, a boosted Z can easily make brand new, warmed-up, performance tires act like they are bald

BGTV8 · 08-24-2018, 05:16 PM

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!

Why did that happen? I have Pilot Super sports 275/35 on the rears and I was going in a straight line under WOT, then around the 4000RPM mark it almost felt like someone grabbed my steering wheel and threw it to the right and then to the left!! There was no gradual loss of control sliding etc, it just happend so suddenly out of nowhere.

Anyone else experience this before?

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

Do yourself a favour and leave VDC on

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.

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...

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.

Geoff-AU · 08-26-2018, 05:10 AM

Quote:

Originally Posted by shadow85

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.

Please tell me which part of South Australia to avoid if I visit. I don't want to be anywhere near one of your WOT pulls. This kind of irresponsible behaviour is what gives car enthusiasts a bad name. When you get caught or bin it or kill yourself we will all suffer from the resulting media hysteria.

shadow85 · 08-26-2018, 06:10 AM

Quote:

Originally Posted by Geoff-AU

Please tell me which part of South Australia to avoid if I visit. I don't want to be anywhere near one of your WOT pulls. This kind of irresponsible behaviour is what gives car enthusiasts a bad name. When you get caught or bin it or kill yourself we will all suffer from the resulting media hysteria.

Man u guys make it sound like I am hell bent on hurting someone on the streets. I am only doing the WOT pulls on a closed industrial road far away from public late at night when there is nobody around. I do not for one second want to try it on normal public roads.

And the only reason why I am doing it is to complete my remote tune.

jwick · 08-25-2018, 11:18 AM

Seb is the man!

08-24-2018, 01:16 PM	#2 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465057	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. __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

08-24-2018, 02:25 PM	#6 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4211	Trips, JARblue, Chuck33079 and 2 others like this. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

08-24-2018, 04:08 PM	#7 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 44 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684441	I bought the Z through a local dealer from another dealer and had to wait for delivery. In the week I waited, the dealer gave me a loaner Z that had essentially bald tires. One moderate throttle application mid-turn and I was slideways back and forth within inches of the curb multiple times. Without prior experience I would have had no shot at recovering, and it was still unexpected and scary as $hit. While I made sure to let the dealership have a piece of my mind for giving me a sports car with tires with 3/32" tread remaining, it was definitely a lesson that was reinforced hard: respect the powah. With improper throttle application, a boosted Z can easily make brand new, warmed-up, performance tires act like they are bald __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

08-25-2018, 11:18 AM	#15 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465057	Seb is the man! __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

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