2000 rpm AT power braking... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Jaden · 09-09-2014, 06:21 PM

Has anyone figured out how to increase the power braking RPM for the Auto trans????

Jaden

Fast_Freddy · 09-09-2014, 07:02 PM

Find a higher stall torque converter or send yours out to be modified.

Jaden · 09-09-2014, 07:19 PM

Quote:

Originally Posted by Fast_Freddy

Find a higher stall torque converter or send yours out to be modified.

I'm planning on doing so, I was just wondering if anyone had figured out how to adjust the rev limiter when power braking...It would be nice to keep it, but be able to raise it to 3500 or so...

Jaden

Fast_Freddy · 09-09-2014, 07:40 PM

AFAIK the rev limiter is set to 7400 rpm. The only "rev limit" when power braking is the TC locking up at ~2000 rpm. Once the tires break loose you can rev to 7400 rpm if you want.

Unless I'm missing something about the stock tune because I had my car tuned very early on, what you want is a high-stall TC that doesn't lock up until 3500 rpm.

Maybe I should be more clear. When I say "lock up" I'm not referring to the electronic TC lockup but rather it's hydraulic stall speed or lock-up. It's not something that can be changed via tuning. The TC has to be internally modified.

FastWhite · 09-10-2014, 05:47 PM

South Side Performance has developed a higher stall converter. Locks up @~3000 rpm.

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Marusich · 09-14-2014, 08:30 AM

I think he's referring to the Smart Stop "feature", not the TC.

FastWhite · 02-10-2015, 06:17 PM

Here is a follow up on A/T launches. I was seriously looking into the above stall convertor but was holding off on the purchase until after my tune was installed.
I now don't need it.
With the tune and brand new Dunlop ZII StarSpec's I could spin the tire, on launch as much as I needed too. It launched so well that one of the EVO instructors commented on how well it launched. He didn't the car could do that.
I am NA with a skunk 2 CAI, Perrin over pipe back exhaust, 2 1/2". Temperatures was into the low 70's.

Sent from my iPhone using Tapatalk

BlueDubbinTDI · 02-10-2015, 06:43 PM

So what are you guys doing to launch it? Jam the brakes then the gas then just release the brake and go or is there some sort of technique involved?

09-09-2014, 06:21 PM	#1
Jaden Road-hole Join Date: Jul 2014 Drives: 2013 Whiteout FR-S Location: Gilbert, Arizona Posts: 1,112 Thanks: 272 Thanked 479 Times in 292 Posts Mentioned: 13 Post(s)	2000 rpm AT power braking... Has anyone figured out how to increase the power braking RPM for the Auto trans???? Jaden

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09-09-2014, 07:02 PM	#2
Fast_Freddy Senior Member Join Date: Jul 2012 Drives: Passat Location: East Coast Posts: 626 Thanks: 331 Thanked 188 Times in 130 Posts Mentioned: 6 Post(s)	Find a higher stall torque converter or send yours out to be modified.

09-09-2014, 07:40 PM	#4
Fast_Freddy Senior Member Join Date: Jul 2012 Drives: Passat Location: East Coast Posts: 626 Thanks: 331 Thanked 188 Times in 130 Posts Mentioned: 6 Post(s)	AFAIK the rev limiter is set to 7400 rpm. The only "rev limit" when power braking is the TC locking up at ~2000 rpm. Once the tires break loose you can rev to 7400 rpm if you want. Unless I'm missing something about the stock tune because I had my car tuned very early on, what you want is a high-stall TC that doesn't lock up until 3500 rpm. Maybe I should be more clear. When I say "lock up" I'm not referring to the electronic TC lockup but rather it's hydraulic stall speed or lock-up. It's not something that can be changed via tuning. The TC has to be internally modified.

09-10-2014, 05:47 PM	#5
FastWhite Senior Member Join Date: May 2013 Drives: Subaru BRZ Limited M/T Location: Savannah Georgia Posts: 487 Thanks: 135 Thanked 142 Times in 95 Posts Mentioned: 6 Post(s)	South Side Performance has developed a higher stall converter. Locks up @~3000 rpm. Sent from my iPhone using Tapatalk

09-14-2014, 08:30 AM	#6
Marusich Member Join Date: Aug 2013 Drives: FR-S Location: New Mexico Posts: 61 Thanks: 25 Thanked 28 Times in 16 Posts Mentioned: 1 Post(s)	I think he's referring to the Smart Stop "feature", not the TC.

02-10-2015, 06:17 PM	#7
FastWhite Senior Member Join Date: May 2013 Drives: Subaru BRZ Limited M/T Location: Savannah Georgia Posts: 487 Thanks: 135 Thanked 142 Times in 95 Posts Mentioned: 6 Post(s)	Here is a follow up on A/T launches. I was seriously looking into the above stall convertor but was holding off on the purchase until after my tune was installed. I now don't need it. With the tune and brand new Dunlop ZII StarSpec's I could spin the tire, on launch as much as I needed too. It launched so well that one of the EVO instructors commented on how well it launched. He didn't the car could do that. I am NA with a skunk 2 CAI, Perrin over pipe back exhaust, 2 1/2". Temperatures was into the low 70's. Sent from my iPhone using Tapatalk

02-10-2015, 06:43 PM	#8
BlueDubbinTDI Senior Member Join Date: Mar 2013 Drives: 2013 FR-S, 2012 MCS Location: Jax, FL Posts: 1,975 Thanks: 943 Thanked 570 Times in 356 Posts Mentioned: 4 Post(s)	So what are you guys doing to launch it? Jam the brakes then the gas then just release the brake and go or is there some sort of technique involved?

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