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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 07-07-2013, 11:05 AM   #1
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Disappointed in results from FTI convertor

I installed a 3400 FTI convertor into my 2012 LFX. When I go to launch the car it slowly goes up in RPM than about 1/2 second later flashes to about 1700/1800 RPMs. I am leaving from footbraking, not preloading the convertor. I've had stall convertors before and never felt anything like this. Now this is my first computer controlled car I'm modding. Now if I let off the brake pedal for a second at idle than hit it, it will flash about 2600. Maybe some tuning needs to be done to correct this?? I am using HP Tuners software and have just started remote tuning with Matt@FSP. This was happening before using the HP Tuners software.
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Old 07-07-2013, 11:07 AM   #2
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Did you get it from RX?
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Old 07-07-2013, 11:32 AM   #3
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I have a FTI 3600 stall and am also unhappy with it. It launches well but is all over the place with normal driving.
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Old 07-07-2013, 02:55 PM   #4
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Sorry to hear that, that's too bad... After my first trip to the track with my 13 2LS, I was thinking the best mod I could do for the car for better ET's would be a higher stall converter, and I was considering the FTI... Perhaps I will look elsewhere. Keep us posted.
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Old 07-07-2013, 04:19 PM   #5
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Quote:
Originally Posted by CFD View Post
I have a FTI 3600 stall and am also unhappy with it. It launches well but is all over the place with normal driving.
That's not your convertors fault. Not sure how the 6l80's tuning works if it works off slip or pressure or what.. But I would think normal driving non Wot it would lock up rather nice if your trans tune is ok.
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Old 07-07-2013, 04:23 PM   #6
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Old 07-07-2013, 04:23 PM   #7
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Quote:
Originally Posted by etmx183 View Post
I installed a 3400 FTI convertor into my 2012 LFX. When I go to launch the car it slowly goes up in RPM than about 1/2 second later flashes to about 1700/1800 RPMs. I am leaving from footbraking, not preloading the convertor. I've had stall convertors before and never felt anything like this. Now this is my first computer controlled car I'm modding. Now if I let off the brake pedal for a second at idle than hit it, it will flash about 2600. Maybe some tuning needs to be done to correct this?? I am using HP Tuners software and have just started remote tuning with Matt@FSP. This was happening before using the HP Tuners software.
Matt will get you worked out bud. Let him gather some data and I'm sure he will figure it out.
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Old 07-07-2013, 04:32 PM   #8
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Originally Posted by JLE58 View Post
That's not your convertors fault. Not sure how the 6l80's tuning works if it works off slip or pressure or what.. But I would think normal driving non Wot it would lock up rather nice if your trans tune is ok.

I thought it was in the tune as well but where as I do not do my own tuning and after several sessions of data logging and attempts to correct it the tuner is confident it's a loose converter, could he be wrong, very possible but he is very qualified so that's what I am going on.
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Old 07-08-2013, 05:58 AM   #9
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Thanks for the feedback. I'll be doing some data logging this week for Matt and will post results.
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Old 07-08-2013, 02:02 PM   #10
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Quote:
Originally Posted by JLE58 View Post
That's not your convertors fault. Not sure how the 6l80's tuning works if it works off slip or pressure or what.. But I would think normal driving non Wot it would lock up rather nice if your trans tune is ok.
The TCC does partially apply on the factory converter. It should be tuned to allow 0 slippage with an aftermarket converter. Single or triple disk.
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Old 07-08-2013, 05:31 PM   #11
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Originally Posted by Rhino79 View Post
The TCC does partially apply on the factory converter. It should be tuned to allow 0 slippage with an aftermarket converter. Single or triple disk.

I am not seeing TCC desired slip set at zero except for 1st gear, perhaps this is the reason?
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Old 07-08-2013, 08:25 PM   #12
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Thanks for the feedback, on the highway it is great. Lock up in 4th/5th and 6th. It is the launch that is not stalling when I footbrake. i have to be off the brake for a second than whack the throttle for it to stall. If I hit the throttle at the same time I release the brake pedal it acts like it is cutting power for a second than takes off. Never had this issue with the stock convertor.

Quote:
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The TCC does partially apply on the factory converter. It should be tuned to allow 0 slippage with an aftermarket converter. Single or triple disk.
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Old 07-08-2013, 08:59 PM   #13
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Just need some datalogs and we'll see whats going on.

Only thing I did over the holiday weekend was write a base tune for him so he can start doing some logging, etmx said I'll get some logs during the week but its very hot up there so probably later in the week.
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Old 07-08-2013, 10:40 PM   #14
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Old 07-09-2013, 12:22 AM   #15
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Hi !

there is a Break trq Limitation working in your ECU and cuts the power when both feet are on both pedals same time !

Matt with fix it !

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Old 07-09-2013, 08:45 AM   #16
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Hey Folks,
This post is in no way against Matt, we have only done a base tune with NO datalogs yet. This was an issue BEFORE Matt and I started this venture. I was just being curious. It has been near 100 here and Matt is waiting on me. Thanks again for the feedback and I feel confident that Matt will get this straight when I do my part to give him some data logging. Thanks again for the feedback and also hearing everyone let me know Matt will fix me up.

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Just need some datalogs and we'll see whats going on.

Only thing I did over the holiday weekend was write a base tune for him so he can start doing some logging, etmx said I'll get some logs during the week but its very hot up there so probably later in the week.
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Old 07-09-2013, 09:16 AM   #17
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I am not seeing TCC desired slip set at zero except for 1st gear, perhaps this is the reason?
It will pulse like crazy if its not 0.
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Old 07-15-2013, 10:01 PM   #18
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It will pulse like crazy if its not 0.
^^ went thru hell until Rhino got mine straightened out. I was ready to pull mine out but luckily it all came together. Now I love it! I'm a Circle D fan like Rhino as well.
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Old 07-15-2013, 10:15 PM   #19
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Brake torque management needs to be adjusted in the tune. It will work out fine.
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Old 07-15-2013, 11:05 PM   #20
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It will pulse like crazy if its not 0.
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Old 07-16-2013, 07:02 PM   #21
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It will pulse like crazy if its not 0.
Set them to zero and there is a big improvement with the loose feeling, more so in tapshift most likely because of a more aggressive driving style but there are still issues with the tuning, both motor and tranny, this I am sure of. Just don't have time to deal with it.
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Old 07-21-2013, 05:29 PM   #22
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Glad it's getting better.
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Old 08-10-2013, 03:18 PM   #23
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Any news on this? Fixed w/ tune?
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