boost pressure loss on 997TT - Page 3 - 6SpeedOnline - Porsche Forum and Luxury Car Resource

Nov 15, 2010 | 01:00 PM

#31

milou

Registered User

Joined: May 2008

Posts: 1,768

From: Cyprus

Rep Power: 111

ECU can be modified without increasing rev limiter

Nov 15, 2010 | 03:38 PM

#32

skandalis447

Registered User

Joined: Dec 2007

Posts: 1,671

From: Athens

Rep Power: 135

...I was aware of that...but what about tip cars?Where rpm limit is the same?Or some flashes (such as mine)that have stock rpm limit?

Mar 7, 2011 | 05:18 PM

#33

tuki

Thread Starter

Registered User

Joined: Apr 2009

Posts: 62

From: World Citizen

Rep Power: 20

ok, i'm back with some results.

here is the first test run that we did tonight.

Mar 7, 2011 | 10:16 PM

#34

RUF QTR

Registered User

Joined: Oct 2008

Posts: 123

From: Qatar

Rep Power: 25

Quote:

Originally Posted by tuki

nope, the problem is i don't have a remap nomore, because when I took the car to the workshop last week, they have done an upgrade to the ecu and i've lost the techart remap. I didn't know it till yesterday when we read the ecu we saw that it wasn't techart anymore. so no one is selling me a stuff that i don't need. it's just a stupidity what happened to me.

my last oil change was at 4000 miles (now i have 10400) and the air filter is so dirty.

shotcaller; after these mods i'll try to run 7.4 .. but my goal is to have 5.5 after doing some hardtunes like new turbos etc. I guess 7.4 is realistic

Bear in mind that those Techart wheels are really heavy...

Mar 8, 2011 | 01:01 AM

#35

Shotcaller

Banned

Joined: Jul 2008

Posts: 1,144

From: Florida

Rep Power: 75

Quote:

Originally Posted by tuki

ok, i'm back with some results.

here is the first test run that we did tonight.

Nice ran but shouldn't be quicker since u have mods on ur sign plus lighter wheels?

BTW...How do u fix boost issue?

Mar 8, 2011 | 02:20 AM

#36

speed21

Banned

Joined: Feb 2010

Posts: 2,634

Rep Power: 249

Quote:

Originally Posted by milou

Tuki,

the oil in the intercooler hose is absolutely normal, the turbocharger oiling system is at one side and this is why there is some oil there. The mechanic should know that, if it was me i would never take my car there again. Replacing a turbocharger will cost you around 5k just for nothing.

How is oil able to enter into the intercooler hose? The oiling system is contained to the turbo oil feed. Return line should go into the crankcase.....not inlet hose. I fail to see how the oil can leak into the IC hoses unless it is bi-passing the bearing and shaft seal, leaking out into the compressor wheel area then into the inlet IC hosing.

Last edited by speed21; Mar 8, 2011 at 02:39 AM.

Mar 8, 2011 | 02:36 AM

#37

speed21

Banned

Joined: Feb 2010

Posts: 2,634

Rep Power: 249

Quote:

Originally Posted by tuki

Anyway, the curious thing is, I brought the car to another shop (the owner of the shop is an ex porsche service supervisor) first he said the problem was the wastegates, he repaired it then we did roadtest, everything seemed to be fine. the car was pushing 1.2 bar. after 2 hours same thing happened again. back to 1.0 bar. He checked again and said that there's an oil in the intake hose and it was wet. But the passenger side hose was clean and dry. He said that my turbocharger starts blowing and i need to replace it with the new one.

Any ideas or suggestions ?

A leaky turbo shaft seal cant cause boost loss. It may create some smoke and cause some oil consumption but thats basically it. If the shaft is heavily worn the impeller may be fouling on the housing so the shaft speed may slow. Anyway the turbo could be reconditioned rather than renewed.

Was you car smoking at all on the odd start up out of one bank? Any other symptoms other than boost loss?

Last edited by speed21; Mar 8, 2011 at 02:43 AM.

Mar 10, 2011 | 06:50 AM

#38

tuki

Thread Starter

Registered User

Joined: Apr 2009

Posts: 62

From: World Citizen

Rep Power: 20

Quote:

Originally Posted by Shotcaller

Nice ran but shouldn't be quicker since u have mods on ur sign plus lighter wheels?

BTW...How do u fix boost issue?

well, we were 2 persons, and half tank of gas. The wheels are 20" HRE's. The guys at evotech told me I have to drive the car couple of days as the transmission needs to adapt itself again and next week they will read the ECU and will send the logs to Germany, so they can improve it for a new remap for the ECU and to the transmission.

so we are expecting 0-100 2.9 and 100-200 6.5 sec's next week. I'll keep you guys updated.

After we installed everything, we went out for a test drive, and we were shocked when we saw the car was at 0.8 bars, which was lower than stock turbos. I was goin nuts

But the only thing that we didn't change was the ECU remap. So we head back to evotech and remapped the ecu and transmission, went out and bam! I saw the PSM light was flashing on acceleration. I was happy like a kid !