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

996 TURBO TORQUE IMBALANCE AFTER TUNe

Old Dec 12, 2011 | 08:27 AM
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996 TURBO TORQUE IMBALANCE AFTER TUNe

Can any one help ???

After a re-tune i have a torque imbalance problem and the computer will cut all power. I can re start but have to pull over and remove key. Computer will also cut PSM and ABS for no apparent reason

Car is mildly tuned standard turbos 5 bar fpr full gemballa exhaust evo intake plus a Y pipe GT2 Intercoolers and upgraded diverter valves, 920nm Clutch and wave trac limited slip diff.

Chassis dyno says 298kw and 852nm at the wheels. Approx 400hp and 628ft lbs.

Need help with the Torque Imbalance its not really a problem but would like it to stop as with the PSM ABS trouble.

I took it back to the tuner and he raised the torque limit 10% but with no sucess
 
Old Dec 12, 2011 | 08:34 AM
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Tim....sounds like your ECU is going into some sort of limp mode. What tune do you have?

I'm not a tuning expert by any means, but the fact that you have 628 lb/ft of TQ with only 400 HP is a big red flag for me. If I had to guess I'd say that there is something in the tune that's causing the OEM safety protocols to kick in. Something seems way off.
 
Old Dec 12, 2011 | 08:41 AM
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Car was bench tuned on a dyno jet chassis dyno in Australia.

I like more torque than hp because of the strict laws in AU.

To get the added Torque thee Tuner just adds some more fuel, simple really.

Car is very quick but have these problems yes you are correct the computer hits the safety button.

Porsche say there is no problem but are unsure how to fix.
 

Last edited by timccloud; Dec 13, 2011 at 06:58 AM.
Old Dec 12, 2011 | 10:22 AM
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looks like i have a leak problem and need to do a leak test at 25psi
 
Old Dec 12, 2011 | 10:50 AM
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"Approx 400hp and 628ft lbs.".. I don't think it was tuned right.
 
Old Dec 12, 2011 | 10:57 AM
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why ???

it drives really well, i seem to have a boost leak i think
 
Old Dec 12, 2011 | 11:01 AM
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your soft top looks great
 
Old Dec 12, 2011 | 11:06 AM
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I don't think he means top hp, it's probably 400 hp at 628 ft-lbs (3344 rpm) which makes more sense.
 
Old Dec 12, 2011 | 11:13 AM
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i will post the dyno

i only have the old one until im back ashore
 
Old Dec 12, 2011 | 11:18 AM
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dyno sheets are in pics but not the latest until i get home
 
Old Dec 12, 2011 | 11:18 AM
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Standard turbos? Which turbos, k16 or k24? Your TQ to HP ratio is all jacked up. You'll probably blow a turbo soon. Too much timing? IMO, that tune is all wrong.
 

Last edited by BlackHorseTurbo; Dec 12, 2011 at 01:32 PM. Reason: ration to ratio
Old Dec 12, 2011 | 11:20 AM
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k16's
 
Old Dec 12, 2011 | 11:24 AM
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Get your money back and go with a different tuner period..
 
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Old Dec 12, 2011 | 11:25 AM
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your headline says it all... IMBALANCE ... If I were you i would get a different tune from someone thats not going to harm your wallet....
 
Old Dec 12, 2011 | 12:12 PM
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That's what I meant, but BHT said it better.

Originally Posted by BlackHorseTurbo
Standard turbos? Which turbos, k16 or k24? Your TQ to HP ration is all jacked up. You'll probably blow a turbo soon. Too much timing? IMO, that tune is all wrong.
 

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