996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Whats the limit of the TIP?

Thread Tools
 
Rate Thread
 
Old May 8, 2009 | 03:35 PM
  #106  
John H.'s Avatar
Registered User
Joined: Nov 2007
Posts: 152
From: Ebola City, Liberia
Rep Power: 27
John H. has a spectacular aura aboutJohn H. has a spectacular aura aboutJohn H. has a spectacular aura about
Originally Posted by BlackHorseTurbo
ASk EVO if they replaced the TC with the upgraded one. IF so, you should be fine.


Modified would be a better descriptive than upgraded. In an application such as this when the factory converter is utilized, there is only one goal - a higher stall speed. To achieve the higher stall speed only two things can be modified - the fins can be bent and/or the stators modified.

What does this do? It increases the stall speed of the converter. It does not make it sturdier or better able to handle increased power.

So what is stall speed? Stall speed in laymen’s terms is the rpm you can achieve while power braking the car. So instead of being able to power brake launch your car at 2k, you can now do it at 3k.

How is this possible? The modified stators/fins allow the converter discs to slip under torque allowing the rpms to rise. Not much unlike slipping your manual clutch.

Pros? By being able to launch your car at a higher rpm you can put the engine higher into the power band and with turbos you can launch under much more boost. Turbo lag will be much lower if nonexistent.

Cons?

1) Heat
Under torque, the converter will slip considerably more than with the stock stall speed. Under torque is not just power braking, but anytime you're at WOT such as a high speed pass. With slip comes heat - a LOT of heat. If you’re not running a large external tranny cooler, you will overheat the clutch bands in your stock tranny. At cruise, your ECU will lock the converter discs together to eliminate slip. Once you start to accelerate or create load such as going up a hill, it will unlock.

2) Less top range power
With slippage, you will be putting down less power. A stock stall convertered car with the same setup will pull on you at highway speeds.

The only reason for a higher stalled converter is dead stop racing. Not something I'd want on a car that did roll racing - especially prolonged and back to back where the ATF will start to boil.

John H
 

Last edited by John H.; May 8, 2009 at 05:08 PM.
Old May 8, 2009 | 04:58 PM
  #107  
_Zac's Avatar
Registered User
Joined: May 2008
Posts: 378
From: Houston, TX
Rep Power: 51
_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future_Zac has a brilliant future
Should be a interesting race..
 
Old May 14, 2009 | 09:30 AM
  #108  
007-911's Avatar
Thread Starter
|
Registered User
Joined: Apr 2009
Posts: 507
From: Bloomingdale, IL
Rep Power: 49
007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of
Originally Posted by John H.

Modified would be a better descriptive than upgraded. In an application such as this when the factory converter is utilized, there is only one goal - a higher stall speed. To achieve the higher stall speed only two things can be modified - the fins can be bent and/or the stators modified.

What does this do? It increases the stall speed of the converter. It does not make it sturdier or better able to handle increased power.

So what is stall speed? Stall speed in laymen’s terms is the rpm you can achieve while power braking the car. So instead of being able to power brake launch your car at 2k, you can now do it at 3k.

How is this possible? The modified stators/fins allow the converter discs to slip under torque allowing the rpms to rise. Not much unlike slipping your manual clutch.

Pros? By being able to launch your car at a higher rpm you can put the engine higher into the power band and with turbos you can launch under much more boost. Turbo lag will be much lower if nonexistent.

Cons?

1) Heat
Under torque, the converter will slip considerably more than with the stock stall speed. Under torque is not just power braking, but anytime you're at WOT such as a high speed pass. With slip comes heat - a LOT of heat. If you’re not running a large external tranny cooler, you will overheat the clutch bands in your stock tranny. At cruise, your ECU will lock the converter discs together to eliminate slip. Once you start to accelerate or create load such as going up a hill, it will unlock.

2) Less top range power
With slippage, you will be putting down less power. A stock stall convertered car with the same setup will pull on you at highway speeds.

The only reason for a higher stalled converter is dead stop racing. Not something I'd want on a car that did roll racing - especially prolonged and back to back where the ATF will start to boil.

John H
John,

Do you know of any companies that make stock stall TC? As for the heat, is there any companies making aftermarket transmission coolers to help deal with the excessive heat?

Thanks,

Vince
 
Old May 14, 2009 | 09:59 AM
  #109  
BlackHorseTurbo's Avatar
Registered User
Joined: Jul 2008
Posts: 5,301
From: Houston
Rep Power: 607
BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !
9FF makes a cooler. It's 10K I think. Ouch!
 
Old May 14, 2009 | 10:28 AM
  #110  
TXGold's Avatar
Registered User
Joined: Apr 2006
Posts: 1,817
From: Houston, TX
Rep Power: 238
TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !TXGold Is a GOD !
Glad you're back in business, Todd. Let us hear about the beefy Tip when you get time.

Ryan
 
Old May 14, 2009 | 10:38 AM
  #111  
ttboost's Avatar
Registered User
Joined: Jul 2008
Posts: 6,453
From: CT
Rep Power: 439
ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !ttboost Is a GOD !
You should absolutely have the biggest tranny cooler you can fit, when it comes to that, more is better.
 
Old May 14, 2009 | 08:46 PM
  #112  
John H.'s Avatar
Registered User
Joined: Nov 2007
Posts: 152
From: Ebola City, Liberia
Rep Power: 27
John H. has a spectacular aura aboutJohn H. has a spectacular aura aboutJohn H. has a spectacular aura about
Originally Posted by 007-911
John,

Do you know of any companies that make stock stall TC? As for the heat, is there any companies making aftermarket transmission coolers to help deal with the excessive heat?

Thanks,

Vince
B&M makes some of the best trans coolers on the market and a lot of very top tier drag racers use them on their cars. You can find them online at Summit Racing from $60 for a passive - $205 for one with a built in fan and thermostat relay.
http://store.summitracing.com/egnsea...rdSearch#rstop

Hookup is relatively the same for all auto cars. You intercept the stock pos "cooler" and add this one inline. If you can't do it yourself, it should cost no more than an hour labor. So with Porsche tax that come to $900/hr? The only issue you'll run into is finding a choice mounting position for it. If you can't find one that gets good air across the cooler mounted vertical, you can always use the fanned one anywhere. Heck, mounted flat right on top of something even. Less than 100%, but loads better than nothing. Don't have more than 2 coolers as it will create a load on the fluid pump. Any fluid capacity to the system you can add is also a good thing for keeping temps down.

John H
 
Old May 14, 2009 | 09:15 PM
  #113  
John H.'s Avatar
Registered User
Joined: Nov 2007
Posts: 152
From: Ebola City, Liberia
Rep Power: 27
John H. has a spectacular aura aboutJohn H. has a spectacular aura aboutJohn H. has a spectacular aura about
Originally Posted by BlackHorseTurbo
9FF makes a cooler. It's 10K I think. Ouch!
Maybe if it was made of platinum. I wouldn't be suprised if it was a rebadged cooler anyway. If they were smart they'd have some Chinese Co remake an existing design at a fraction of the cost, add a custom 996TT fitting, call it their own, profit. Sort of like a couple parts on my car. At least until the Chinese Co starts advertising it on Ebay directly for a lot less. I digress.

John H
 
Old May 14, 2009 | 09:28 PM
  #114  
BlackHorseTurbo's Avatar
Registered User
Joined: Jul 2008
Posts: 5,301
From: Houston
Rep Power: 607
BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !
Originally Posted by TXGold
Glad you're back in business, Todd. Let us hear about the beefy Tip when you get time.

Ryan
Not quite back in business. Should be up and running in 2 weeks.
 
Old May 15, 2009 | 12:16 AM
  #115  
Shotcaller's Avatar
Banned
Joined: Jul 2008
Posts: 1,144
From: Florida
Rep Power: 75
Shotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud ofShotcaller has much to be proud of
Originally Posted by BlackHorseTurbo
Not quite back in business. Should be up and running in 2 weeks.

So u rebuild the tranny with EVO TC?
 
Old May 15, 2009 | 05:20 AM
  #116  
Harold's Avatar
Registered User
Joined: Sep 2007
Posts: 805
From: Singapore
Rep Power: 65
Harold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud of
Originally Posted by John H.

Modified would be a better descriptive than upgraded. In an application such as this when the factory converter is utilized, there is only one goal - a higher stall speed. To achieve the higher stall speed only two things can be modified - the fins can be bent and/or the stators modified.

What does this do? It increases the stall speed of the converter. It does not make it sturdier or better able to handle increased power.

So what is stall speed? Stall speed in laymen’s terms is the rpm you can achieve while power braking the car. So instead of being able to power brake launch your car at 2k, you can now do it at 3k.

How is this possible? The modified stators/fins allow the converter discs to slip under torque allowing the rpms to rise. Not much unlike slipping your manual clutch.

Pros? By being able to launch your car at a higher rpm you can put the engine higher into the power band and with turbos you can launch under much more boost. Turbo lag will be much lower if nonexistent.

Cons?

1) Heat
Under torque, the converter will slip considerably more than with the stock stall speed. Under torque is not just power braking, but anytime you're at WOT such as a high speed pass. With slip comes heat - a LOT of heat. If you’re not running a large external tranny cooler, you will overheat the clutch bands in your stock tranny. At cruise, your ECU will lock the converter discs together to eliminate slip. Once you start to accelerate or create load such as going up a hill, it will unlock.

2) Less top range power
With slippage, you will be putting down less power. A stock stall convertered car with the same setup will pull on you at highway speeds.

The only reason for a higher stalled converter is dead stop racing. Not something I'd want on a car that did roll racing - especially prolonged and back to back where the ATF will start to boil.

John H
Great summary, much thanks
 
Old May 15, 2009 | 05:23 AM
  #117  
Harold's Avatar
Registered User
Joined: Sep 2007
Posts: 805
From: Singapore
Rep Power: 65
Harold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud ofHarold has much to be proud of
Originally Posted by 007-911
John,

Do you know of any companies that make stock stall TC? As for the heat, is there any companies making aftermarket transmission coolers to help deal with the excessive heat?

Thanks,

Vince
This is my external cooler. Cant remember off hand who it was from, will check. Needed full plumbing that I have now had custom made out of hard piping for durability sake.
 
Attached Images  
Old May 15, 2009 | 07:23 AM
  #118  
boca996tt's Avatar
Registered User
Joined: Apr 2008
Posts: 2,101
From: Huntington NY & boca raton florida
Rep Power: 106
boca996tt is just really niceboca996tt is just really niceboca996tt is just really niceboca996tt is just really nice
would like to know who made that cooler..
 
Old May 15, 2009 | 09:12 AM
  #119  
007-911's Avatar
Thread Starter
|
Registered User
Joined: Apr 2009
Posts: 507
From: Bloomingdale, IL
Rep Power: 49
007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of007-911 has much to be proud of
Originally Posted by Harold
This is my external cooler. Cant remember off hand who it was from, will check. Needed full plumbing that I have now had custom made out of hard piping for durability sake.

Have you had any issues with your trans at all? How much power are you putting down?
 
Old May 15, 2009 | 09:19 AM
  #120  
BlackHorseTurbo's Avatar
Registered User
Joined: Jul 2008
Posts: 5,301
From: Houston
Rep Power: 607
BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !BlackHorseTurbo Is a GOD !
Originally Posted by Harold
This is my external cooler. Cant remember off hand who it was from, will check. Needed full plumbing that I have now had custom made out of hard piping for durability sake.
I want that....
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -6. The time now is 01:40 PM.