out with limiters!

chii370 · 08-01-2010, 12:13 AM

Has anyone came up with a way to turn off this cars limiters that don't cost 550+ dollars from the get go? I personally believe that if you sell a sports car like this that anyone that even speaks the word "limiter" in the development phase should be immediately executed on the spot

that being said there are only 2 on the car that concern me, i couldnt care less about the rev limiter as it actually aids against stupid people blowing up the engine. But the top speed limiter (155mph) and the WOT control (wide open throttle/0-60 acceleration limiter) are a complete waste on a genuine sports car.....

I can understand maybe putting these on the base or touring models, but i have a nismo for Christs sake!! lol thats like going to Iraq, getting an M16 handed to you and saying "you know what? i only want 5 rounds in each of my clips" then proceeding to take out the other 25 in each clip and throw them away.

If anyone knows or has particular skill in reprogramming these cars w/o the aid of a crazy fat wallet it would be most helpful..... and im sure im not the only one frustrated with it :P

WarmAndSCSI · 08-01-2010, 12:19 AM

I would suggest finding somebody with a "pro tuner" license on either the Cobb or RevUp platforms. I'm sure they would delete the speed limiter for a very fair price. You may have an issue finding one in your area...

What are you talking about with a 0-60/WOT limiter? These cars have no such thing once VDC is turned off... I'm sure the throttle maps can be tweaked to make the engine "feel" more responsive, or the VVEL maps in this case (which cannot be modified as of yet).

Lemers · 08-01-2010, 02:40 AM

When I finally hit 155 and still wanting more then I'll be upset about the speed limiter. Until then it's just about bragging rights and I've got a Z not too many of my friends even start that fight.

chii370 · 08-01-2010, 09:49 AM

hmmm i very well may be wrong about the WOT limiter but it was my understanding that they are to limit wheel spin and maximize take off, not eliminate it all together to PREVENT wheel spin like VDC does. There are many sports cars that have this, but its been factory tuned based on that particular cars performance to best suit launching the vehicle off the line, especially on a car that has a lot of horse power. even with 285 tires in the back 350 FWHP is more then enough grunt to get them roasting and the revs bouncing off the red line, so this assists with it. VDC on the other hand cuts out fuel and air intake to the cylinders as soon as it detects wheel spin for poor road condition control. please correct me if im wrong, im more of a old school car guy so some of the newer car tech is somewhat unfamiliar to me but that's how i understand it. I guess i just don't like the idea of the car being hampered. It just doesn't make any sense to even put a limiter on it in the first place, even a stock 2010 hemi SRT8 Challenger can get up to around 171 (watch top gear) and is limited by aerodynamics, so why so worried about a 6 cylinder import? its true that these days 155 is the limit on most cars, but not all.... so what dictates this exactly?

Thanks for the info WarmandSCSI, would you recommend one of the tuners you can buy from say.... HKS, AEM, or Hypertech? they claim that they just simply plug in under the dash, are custom made for each specific motor (even the nismo vs normal Z) and takes but about 15 min to turn off all the limiters and get a slight tune increase..... this seems to good to be true, otherwise there wouldn't be trained professionals using very sophisticated equipment over the span of days in testing to tune a car. And if they DO work, will they work if you have the car turbo or supercharged since they usually come with a whole new ECU thats been custom flashed.

theDreamer · 08-01-2010, 10:18 AM

The WOT limiter is VDC, you can turn that off at anytime on the left of the steering wheel (there is a button).
The speed limiter, unless you are hitting the track I would not be concerned with it.

m4a1mustang · 08-01-2010, 10:25 AM

Quote:

Originally Posted by theDreamer

The WOT limiter is VDC, you can turn that off at anytime on the left of the steering wheel (there is a button).
The speed limiter, unless you are hitting the track I would not be concerned with it.

And even then you'd have to be on a huge track to come close to hitting 155. I think KillerBee was hitting somewhere between 120-140 on at the end of the long-*** front stretch at the Auto Club Speedway oval.

As far as tunes being too good to be true... they aren't They're not going to magically give you 20 whp, but a good tune will improve driveability and will correct a/f ratios, especially on N/A bolt-on cars which need a tune to correct the ratios that their mods have thrown out of whack.

VCuomo · 08-01-2010, 03:31 PM

Quote:

Originally Posted by chii370

... I can understand maybe putting these on the base or touring models, but i have a nismo for Christs sake!! ...

Hate to tell you, but the Nismo isn't that much different than a base or touring model.

m4a1mustang · 08-01-2010, 03:36 PM

Quote:

Originally Posted by VCuomo

Hate to tell you, but the Nismo isn't that much different than a base or touring model.

Indeed. Hell, the NISMO is slower than the Base 7AT in the quarter mile.

Lemers · 08-01-2010, 03:38 PM

According to the AT guys around here. The AT is faster than everything.

fairladyZ34 · 08-01-2010, 03:40 PM

you dont need a long track to hit the top speed limiter, maybe just some late late night open highway...

m4a1mustang · 08-01-2010, 03:41 PM

Quote:

Originally Posted by Lemers

According to the AT guys around here. The AT is faster than everything.

The AT is faster than the SRT-4, which is the fastest car in the world.

Lemers · 08-01-2010, 03:46 PM

I wanted the SRT-4 bit I got stuck with a 370z.

Dr. JD · 08-02-2010, 02:26 AM

Quote:

Originally Posted by m4a1mustang

The AT is faster than the SRT-4, which is the fastest car in the world.

BGTV8 · 08-02-2010, 03:01 AM

Quote:

Originally Posted by chii370

Has anyone came up with a way to turn off this cars limiters that don't cost 550+ dollars from the get go? I personally believe that if you sell a sports car like this that anyone that even speaks the word "limiter" in the development phase should be immediately executed on the spot

that being said there are only 2 on the car that concern me, i couldnt care less about the rev limiter as it actually aids against stupid people blowing up the engine. But the top speed limiter (155mph) and the WOT control (wide open throttle/0-60 acceleration limiter) are a complete waste on a genuine sports car.....

I can understand maybe putting these on the base or touring models, but i have a nismo for Christs sake!! lol thats like going to Iraq, getting an M16 handed to you and saying "you know what? i only want 5 rounds in each of my clips" then proceeding to take out the other 25 in each clip and throw them away.

If anyone knows or has particular skill in reprogramming these cars w/o the aid of a crazy fat wallet it would be most helpful..... and im sure im not the only one frustrated with it :P

The "torque limiter" in low gears (1st for sure, and possibly 2nd as well) is an igntion spark advance and throttle control to prevent frying the rear tyres and more importantly, giving the gearbox a hard time in lower gears.

It is Nissan's defence mechanism against ham-firsted launches that break the gearbox (think "dial up 7-grand and sidestep the clutch pedal" type launches).

Bear in mind that a gearbox is actually a torque multiplication device - and 1st gear in a 6MT has a ratio of 3.7949 to 1 implies that each tooth in 1st gear has to deal with 3.7949 times maxTorque of 365Nm .... hence Mr Nissan's worldly engineers thought "we have control of the throttle and spark so we'll take the edge off this ... and maybe the gearbox will last a little longer".

Sure, you might not be able to accomplish the long snakey twin black line launches in an older car, but you can still launch at the limits of tyre adhesion, it is just not so spectacular.

If you really want spectacular, spend the bucks ...

RB

>135I · 08-02-2010, 07:28 AM

Well according to past post the vdc even though turned off, is still actually running at about 10%. I have went through the trouble of pulling up the center console and unplugging the module itself. That way you can be sure it's 100% off. My car has been like this for about 4 months with no issues.

08-01-2010, 12:13 AM	#1 (permalink)
chii370 Track Member Join Date: Jul 2010 Location: . Posts: 642 Drives: . Rep Power: 17	out with limiters! Has anyone came up with a way to turn off this cars limiters that don't cost 550+ dollars from the get go? I personally believe that if you sell a sports car like this that anyone that even speaks the word "limiter" in the development phase should be immediately executed on the spot that being said there are only 2 on the car that concern me, i couldnt care less about the rev limiter as it actually aids against stupid people blowing up the engine. But the top speed limiter (155mph) and the WOT control (wide open throttle/0-60 acceleration limiter) are a complete waste on a genuine sports car..... I can understand maybe putting these on the base or touring models, but i have a nismo for Christs sake!! lol thats like going to Iraq, getting an M16 handed to you and saying "you know what? i only want 5 rounds in each of my clips" then proceeding to take out the other 25 in each clip and throw them away. If anyone knows or has particular skill in reprogramming these cars w/o the aid of a crazy fat wallet it would be most helpful..... and im sure im not the only one frustrated with it :P

08-01-2010, 12:19 AM	#2 (permalink)
WarmAndSCSI A True Z Fanatic Join Date: May 2010 Location: SLC, UT Posts: 1,671 Drives: '08 Evo X \| '10 370Z Rep Power: 19	I would suggest finding somebody with a "pro tuner" license on either the Cobb or RevUp platforms. I'm sure they would delete the speed limiter for a very fair price. You may have an issue finding one in your area... What are you talking about with a 0-60/WOT limiter? These cars have no such thing once VDC is turned off... I'm sure the throttle maps can be tweaked to make the engine "feel" more responsive, or the VVEL maps in this case (which cannot be modified as of yet). __________________ '10 PW 370Z 7AT - wife's car - Project Raspberry Cheesecake '08 Evo X - built motor+trans \| BB-X @ 32 psi \| CH3OH \| self-built+tuned - ??? WHP '01 Galant V6 - built motor \| GT35R \| self-built+tuned - 550+ WHP (retired)

08-01-2010, 02:40 AM	#3 (permalink)
Lemers A True Z Fanatic Join Date: Mar 2010 Location: Izmir, Turkey Posts: 15,371 Drives: 2012 Traverse LTZ Rep Power: 53	When I finally hit 155 and still wanting more then I'll be upset about the speed limiter. Until then it's just about bragging rights and I've got a Z not too many of my friends even start that fight. __________________ 2010 Black Cherry Touring/Sport/Nav Now - 2012 Travese LTZ until I leave for Turkey

08-01-2010, 10:18 AM	#5 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4211	The WOT limiter is VDC, you can turn that off at anytime on the left of the steering wheel (there is a button). The speed limiter, unless you are hitting the track I would not be concerned with it. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

08-01-2010, 03:38 PM	#9 (permalink)
Lemers A True Z Fanatic Join Date: Mar 2010 Location: Izmir, Turkey Posts: 15,371 Drives: 2012 Traverse LTZ Rep Power: 53	According to the AT guys around here. The AT is faster than everything. __________________ 2010 Black Cherry Touring/Sport/Nav Now - 2012 Travese LTZ until I leave for Turkey

08-01-2010, 09:49 AM	#4 (permalink)
chii370 Track Member Join Date: Jul 2010 Location: . Posts: 642 Drives: . Rep Power: 17	hmmm i very well may be wrong about the WOT limiter but it was my understanding that they are to limit wheel spin and maximize take off, not eliminate it all together to PREVENT wheel spin like VDC does. There are many sports cars that have this, but its been factory tuned based on that particular cars performance to best suit launching the vehicle off the line, especially on a car that has a lot of horse power. even with 285 tires in the back 350 FWHP is more then enough grunt to get them roasting and the revs bouncing off the red line, so this assists with it. VDC on the other hand cuts out fuel and air intake to the cylinders as soon as it detects wheel spin for poor road condition control. please correct me if im wrong, im more of a old school car guy so some of the newer car tech is somewhat unfamiliar to me but that's how i understand it. I guess i just don't like the idea of the car being hampered. It just doesn't make any sense to even put a limiter on it in the first place, even a stock 2010 hemi SRT8 Challenger can get up to around 171 (watch top gear) and is limited by aerodynamics, so why so worried about a 6 cylinder import? its true that these days 155 is the limit on most cars, but not all.... so what dictates this exactly? Thanks for the info WarmandSCSI, would you recommend one of the tuners you can buy from say.... HKS, AEM, or Hypertech? they claim that they just simply plug in under the dash, are custom made for each specific motor (even the nismo vs normal Z) and takes but about 15 min to turn off all the limiters and get a slight tune increase..... this seems to good to be true, otherwise there wouldn't be trained professionals using very sophisticated equipment over the span of days in testing to tune a car. And if they DO work, will they work if you have the car turbo or supercharged since they usually come with a whole new ECU thats been custom flashed.

08-01-2010, 03:40 PM	#10 (permalink)
fairladyZ34 A True Z Fanatic Join Date: Aug 2009 Location: Central NJ Posts: 1,577 Drives: 08 G37S Black M6 Rep Power: 19	you dont need a long track to hit the top speed limiter, maybe just some late late night open highway... __________________ From Z to G to BMW and back to a G! Nismo for life

08-01-2010, 03:46 PM	#12 (permalink)
Lemers A True Z Fanatic Join Date: Mar 2010 Location: Izmir, Turkey Posts: 15,371 Drives: 2012 Traverse LTZ Rep Power: 53	I wanted the SRT-4 bit I got stuck with a 370z. __________________ 2010 Black Cherry Touring/Sport/Nav Now - 2012 Travese LTZ until I leave for Turkey

08-02-2010, 07:28 AM	#15 (permalink)
>135I Enthusiast Member Join Date: Apr 2009 Location: Radcliff, KY Age: 43 Posts: 409 Drives: 2003 Cobra Rep Power: 17	Well according to past post the vdc even though turned off, is still actually running at about 10%. I have went through the trouble of pulling up the center console and unplugging the module itself. That way you can be sure it's 100% off. My car has been like this for about 4 months with no issues. __________________ I will miss my Z. I hope she goes to a good home.