GTM Traction Control NA

Z eliminator · 07-04-2011, 05:30 AM

The TC unit is not really suited for drag racing with a 7 AT. The launch control works with a 6 MT. ( spoke ro race logic about this ). Best time was a 12.81 The car ran straight as an arrow. There was no taction on the line as the launching pad was terrible half rubber and half bare ashault. Best 60 ft times were 2.059. The DA was 1890, NOt good for the car making power. Its hard to belive that you can spin 305 35 18 drag radials !!!. This has never happened before. I also have line lock on the car and the burn outs were great so heating up the tires was no problems. The times went from 12.91 to 12.81. Please not the brake fuse was also pulled.
When i disconected and removed the TC it ran a 12.67 with a 1.95, 60 ft time.
when i ran the 12.42 the DA was 10. If you ajust the times for a DA of 1890 the 12.67 is excellant. with a better 60 ft time it would have gone 12.53. Not bad for an all motor car. I race a fully modified Mach ! mustang who had slick's and slinney's. He got me off the line but i ran him down. He was running 12.69 on his best pass.
With the TC unit on the car ran richer on A/F.
If the track was in better condition it would have run a low 12.5's or 12.49 with a 1.85 60 ft time with the TC on.
I had the slip set for 10%.
Im very happy with the times as not many cars were quicker than mine and everybody had bad 60 ft time's
With the TC on you can drive it with 1 hand on the wheel and it will go straght as an arrow.
Now this was the first time at the track and next time i will be going to my regualar track were i cut 1.85 's all day. I will post on it then.
the 12. 67 pass i had to drive the car a lot harder than the 12.81 pass with the TC on.
Driving on the roads you can not beat it has the car had perfect traction and drives like a dream.
All you have to do is go around a nice sharp bend in the road and floor it. You will leave the guy beside in your dust. It cuts the engine power very nicely and give you perfect grip. once the tire's stop slipping it aplply's full power. You can not do this with out the unit on.
If i was bracket racing nothing and i mean nothing would have beat me as could run 12.81 to 12.82 all day with the unit on . with 2.059 60 ft times.
Now when i get the 530 rwhp GTM SC this unit will work even better on the car.
Z

SPOHN · 07-04-2011, 10:17 AM

So I assume it's safe to say that this unit works best with high HP applications and tracks (road course).

Red__Zed · 07-04-2011, 10:40 AM

Curious to see how the unIt performs for road course use.

Z eliminator · 07-04-2011, 10:49 AM

All the research that ive done indicates that it work great on raod course. The harder you push the car the more inpresive it is.
at the drag strip we tryed a lot of differnt things but the weather was terrible as it kept drizsling rain most of the morning causing the track conditions to get worse as the day went on. There was no sun to dry the track out,
Just a terrible day and the start line was just brutal.
I will take a 12.67 any day in those conditions.
Z

wstar · 07-04-2011, 06:03 PM

Z-elim, I never saw an answer to this earlier: did you install a higher-stall torque converter already? The stall on our stock converter is pretty low, and that alone would have screwed up "launch control" if you were setting the racelogic at 4K or whatever.

b1adesofcha0s · 07-04-2011, 07:23 PM

Quote:

Originally Posted by wstar

Z-elim, I never saw an answer to this earlier: did you install a higher-stall torque converter already? The stall on our stock converter is pretty low, and that alone would have screwed up "launch control" if you were setting the racelogic at 4K or whatever.

Yes he has the higher-stall torque converter from GTM

toner123 · 07-04-2011, 10:09 PM

Hey Z, I was having a hard time understanding your post. You are saying this isn't good for the drag or am I reading this wrong?

Z eliminator · 07-05-2011, 07:40 AM

If you have an auto matic 7 AT it will not work well for drag racing,but if you have a 6 MT it will launch you like a missle. I can hold the car to 1900 rpm on leaving the line with the gas and brake on. (you have to pull the brake fuse or the ECU will kills the motor.
I have a GTM converter. I was hoping for a 2800 rpm stall but it only 1900 to 2100 rpm.
The converter took my car from 12.85 to 12.42's. Thats a big improvement , on that run it held to 2500 rpm. ( i data logged that run). Im now talking to pro torque about getting a 3200 stall made for me but i do not have a spare converter. The problem also is that the back brakes will not hold the car. Im not to sure what effect the brake fuse has on the TC unit when you pull it,
Going back to the converter, My car shifts harder with it and faster, 0.31 to 0.35 seconds.
1 st to 4th. 4th to 5th is 0.61. It makes a big difference . Over the winter i may send it out to get the stall increased.
Its a good mod but refilling the tranney is a major pain, took me 3 times till it was full.
Do not let nissan use there procedure for filling your tranney as they drain it and refill it.
I was down 2.2 Quarts after they did this and out 188.00 dollars. Talk to Sam for the proper way to fill it.
With the TC on the car burns more gas not sure why couild be my heavy riight foot.
with the street tires on and set at 10 % it a terror on the road especially from the stop lights. Just could not make it work on the drag strip.
When i shift at 7500 rpm there is always some tire spin as the tac hit 8000 rpm with the TC on this does not happen.
Can not wait to see what it will do with the SC on 500 + rwhp.

Z

b1adesofcha0s · 07-05-2011, 09:52 AM

A little off topic here, but Z elim what do you think are the best shift points for a stock or relatively stock 7AT? I usually just try to get close to redline when I shift at the drag strip.

Z eliminator · 07-05-2011, 11:31 AM

i have bumped my limiter to 8100. I try to shift at 74 to 7500 rpm .
there is no real power abouve 7400 rpm,
My tack is also out by 200 rpm at the top end so 8100 = 8300 rpm.

Z

NYBladeZ · 07-05-2011, 11:41 AM

Z elim, I might be wrong but I'm under the impression that you are also running a higher rear gear ratio, is that correct? If so, aren't you concerned that adding an SC will not be overkill? I wonder in general, if you run 4.08's and later add an SC or TT, even with the GTM TC won't the car be almost undriveable? I foresee major traction problems on anything short of drag radials. I'm not talking about the increase in frequency in shifting that such a combination would cause, just the overall driveability.

wstar · 07-05-2011, 12:10 PM

Quote:

Originally Posted by NYBladeZ

I'm not talking about the increase in frequency in shifting that such a combination would cause

This would be my primary concern, even given sufficient traction. Even in bone-stock form, 1st gear on the 7AT goes by very quickly at full throttle. It goes so quickly that it's very hard to get the timing right for the 1-2 upshift without clicking too early or bumping the rev limiter (keep in mind the shift isn't instant anyways, there's a factional second of input and engagement lag).

4.08 gears alone would make that situation even more difficult, and then adding SC...

Maybe some have far better reaction ability than I do, but I think first gear would basically be a waste at that point. You'd just click through to 2nd early to avoid bumping the limiter before you can blink.

b1adesofcha0s · 07-05-2011, 01:35 PM

Quote:

Originally Posted by Z eliminator

i have bumped my limiter to 8100. I try to shift at 74 to 7500 rpm .
there is no real power abouve 7400 rpm,
My tack is also out by 200 rpm at the top end so 8100 = 8300 rpm.

Z

Thanks, I'll aim for 7400 rpm next time

SharpByCoop · 07-06-2011, 08:49 AM

Z eliminator: Props to you for taking the time to chronicle your trials and try to make sense out of a complicated product. That it does not make immediate gains on the strip doesn't surprise me. That it is consistent in it's delivery makes good sense. It's a good product.

How well I know how difficult it is to get better ET's through any product. There always appears to be outside influences that affect.

I wish you continued success. More power = quicker reflexes. Go for it!

Your car is MOVING! Congrats!

Coop

JB-370z · 01-04-2012, 07:22 PM

Quote:

Originally Posted by RCZ

Every one of the things you listed are assists to things I still have to do anyway. I still have to shift, still have to steer, brake and control the car. So which part of driving do I do? All of it. On the track I still have to launch the car, modulate accelerator to keep wheelspin down, shift as fast and smoothly as possible manually all while making sure I'm still going straight.

Don't get sassy. I was just commenting that this is, as he said, becoming a question of how much you can remove driver error and how efficient you can make the car at putting all its power down. Some might argue that's taking the fun or skill out of it too.

A lot of Formula 1 drivers were very happy when they got rid of TC a few years ago even though they knew they would lap slower.

All that being said, I am also very much looking forward to Z Elim giving jnaut some heat. Only way to keep making cars faster.

Im glad this dude is GONE

07-04-2011, 05:30 AM	#31 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	The TC unit is not really suited for drag racing with a 7 AT. The launch control works with a 6 MT. ( spoke ro race logic about this ). Best time was a 12.81 The car ran straight as an arrow. There was no taction on the line as the launching pad was terrible half rubber and half bare ashault. Best 60 ft times were 2.059. The DA was 1890, NOt good for the car making power. Its hard to belive that you can spin 305 35 18 drag radials !!!. This has never happened before. I also have line lock on the car and the burn outs were great so heating up the tires was no problems. The times went from 12.91 to 12.81. Please not the brake fuse was also pulled. When i disconected and removed the TC it ran a 12.67 with a 1.95, 60 ft time. when i ran the 12.42 the DA was 10. If you ajust the times for a DA of 1890 the 12.67 is excellant. with a better 60 ft time it would have gone 12.53. Not bad for an all motor car. I race a fully modified Mach ! mustang who had slick's and slinney's. He got me off the line but i ran him down. He was running 12.69 on his best pass. With the TC unit on the car ran richer on A/F. If the track was in better condition it would have run a low 12.5's or 12.49 with a 1.85 60 ft time with the TC on. I had the slip set for 10%. Im very happy with the times as not many cars were quicker than mine and everybody had bad 60 ft time's With the TC on you can drive it with 1 hand on the wheel and it will go straght as an arrow. Now this was the first time at the track and next time i will be going to my regualar track were i cut 1.85 's all day. I will post on it then. the 12. 67 pass i had to drive the car a lot harder than the 12.81 pass with the TC on. Driving on the roads you can not beat it has the car had perfect traction and drives like a dream. All you have to do is go around a nice sharp bend in the road and floor it. You will leave the guy beside in your dust. It cuts the engine power very nicely and give you perfect grip. once the tire's stop slipping it aplply's full power. You can not do this with out the unit on. If i was bracket racing nothing and i mean nothing would have beat me as could run 12.81 to 12.82 all day with the unit on . with 2.059 60 ft times. Now when i get the 530 rwhp GTM SC this unit will work even better on the car. Z __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015. Last edited by Z eliminator; 07-04-2011 at 05:43 AM.

07-04-2011, 10:17 AM	#32 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	So I assume it's safe to say that this unit works best with high HP applications and tracks (road course). __________________

07-04-2011, 10:49 AM	#34 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	All the research that ive done indicates that it work great on raod course. The harder you push the car the more inpresive it is. at the drag strip we tryed a lot of differnt things but the weather was terrible as it kept drizsling rain most of the morning causing the track conditions to get worse as the day went on. There was no sun to dry the track out, Just a terrible day and the start line was just brutal. I will take a 12.67 any day in those conditions. Z __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

07-04-2011, 06:03 PM	#35 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Z-elim, I never saw an answer to this earlier: did you install a higher-stall torque converter already? The stall on our stock converter is pretty low, and that alone would have screwed up "launch control" if you were setting the racelogic at 4K or whatever. __________________ 7AT Track Car! Journal thread / Car setup details

07-05-2011, 07:40 AM	#38 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	If you have an auto matic 7 AT it will not work well for drag racing,but if you have a 6 MT it will launch you like a missle. I can hold the car to 1900 rpm on leaving the line with the gas and brake on. (you have to pull the brake fuse or the ECU will kills the motor. I have a GTM converter. I was hoping for a 2800 rpm stall but it only 1900 to 2100 rpm. The converter took my car from 12.85 to 12.42's. Thats a big improvement , on that run it held to 2500 rpm. ( i data logged that run). Im now talking to pro torque about getting a 3200 stall made for me but i do not have a spare converter. The problem also is that the back brakes will not hold the car. Im not to sure what effect the brake fuse has on the TC unit when you pull it, Going back to the converter, My car shifts harder with it and faster, 0.31 to 0.35 seconds. 1 st to 4th. 4th to 5th is 0.61. It makes a big difference . Over the winter i may send it out to get the stall increased. Its a good mod but refilling the tranney is a major pain, took me 3 times till it was full. Do not let nissan use there procedure for filling your tranney as they drain it and refill it. I was down 2.2 Quarts after they did this and out 188.00 dollars. Talk to Sam for the proper way to fill it. With the TC on the car burns more gas not sure why couild be my heavy riight foot. with the street tires on and set at 10 % it a terror on the road especially from the stop lights. Just could not make it work on the drag strip. When i shift at 7500 rpm there is always some tire spin as the tac hit 8000 rpm with the TC on this does not happen. Can not wait to see what it will do with the SC on 500 + rwhp. Z __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

07-04-2011, 10:40 AM	#33 (permalink)
Red__Zed A True Z Fanatic Join Date: Jul 2010 Location: window seat Posts: 28,940 Drives: Mostly on two wheels Rep Power: 120	Curious to see how the unIt performs for road course use.

07-04-2011, 10:09 PM	#37 (permalink)
toner123 Track Member Join Date: May 2010 Location: chesapeake va Age: 39 Posts: 823 Drives: TT 370z Touring/SP Rep Power: 16	Hey Z, I was having a hard time understanding your post. You are saying this isn't good for the drag or am I reading this wrong?

07-05-2011, 09:52 AM	#39 (permalink)
b1adesofcha0s A True Z Fanatic Join Date: Jan 2011 Location: MD Posts: 40,963 Drives: HypeTrain Choo Choo! Rep Power: 141	A little off topic here, but Z elim what do you think are the best shift points for a stock or relatively stock 7AT? I usually just try to get close to redline when I shift at the drag strip. __________________ Project: b1adeZmobile (2009 370Z) \| Uprev Tune by AAM Competition \| Berk Exhaust Project: b1adeZmobile 2.0 (2014 C7 Z51) \| Corsa Xtreme Exhaust

07-05-2011, 11:31 AM	#40 (permalink)
Z eliminator A True Z Fanatic Join Date: Jul 2009 Location: Ontario Canada Posts: 1,659 Drives: 370 Z 7AT Sports Rep Power: 19	i have bumped my limiter to 8100. I try to shift at 74 to 7500 rpm . there is no real power abouve 7400 rpm, My tack is also out by 200 rpm at the top end so 8100 = 8300 rpm. Z __________________ 12.343 @114.14 . 4.5 stroker motor is now being built. Dec 1 2015.

07-05-2011, 11:41 AM	#41 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 20	Z elim, I might be wrong but I'm under the impression that you are also running a higher rear gear ratio, is that correct? If so, aren't you concerned that adding an SC will not be overkill? I wonder in general, if you run 4.08's and later add an SC or TT, even with the GTM TC won't the car be almost undriveable? I foresee major traction problems on anything short of drag radials. I'm not talking about the increase in frequency in shifting that such a combination would cause, just the overall driveability. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

07-06-2011, 08:49 AM	#44 (permalink)
SharpByCoop Enthusiast Member Join Date: Sep 2010 Location: Connecticut Posts: 286 Drives: '08 G37S - Graphite Rep Power: 15	Z eliminator: Props to you for taking the time to chronicle your trials and try to make sense out of a complicated product. That it does not make immediate gains on the strip doesn't surprise me. That it is consistent in it's delivery makes good sense. It's a good product. How well I know how difficult it is to get better ET's through any product. There always appears to be outside influences that affect. I wish you continued success. More power = quicker reflexes. Go for it! Your car is MOVING! Congrats! Coop __________________ Jim Cooper - (Retired: '08 Infiniti G37 Sport • TheShopCT built • 11.13 @ 123 mph (click for vid) • GTM Stage II Twin Turbo • 5-speed A/T Level Ten built • 591whp @17 lbs boost) Last edited by SharpByCoop; 07-06-2011 at 08:51 AM.

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