boqueron

I just got my TT one month ago. I had before an M5, two boxsters ( with and without "s") and a 2000 C4. The TT is an extraordinary machine: the acceleration is extraordinary and, something hat surprises me, it understeers far less than my previous C4. The only negative thing is this turbo lag... I have searched upside down the discussion board and I did not find a way to reduce it. By the way, it seems that there is nothing wrong with my car. Porsche mechanics have certified that this is the way it sould behave. Any suggestion ?

Trojan Man

I understand that the 996TT already comes from the factory with turbos that are balanced to provide a combination of maximum power with minimal lag. That I know of, the only way to noticeably reduce lag is to put in smaller turbos, which IMHO would be stupid because you will lose power. Also, I have never heard of anyone doing this, but I am not an expert.

Minis-are-slow

Wouldn't using a freer-flowing exhaust help it to spool quicker?
Also how about using an electronic boost controller such as a GReddy ProfecB
to set the boost to come-on at a lower RPM?

Jeff 993TT

Cat bypass pipes will reduce turbo lag. Muffler bypasses will reduce turbo lag.

Using a boost controller will also work, but is a bit more risky, if not set up correctly.

SPR

yeah doing a europipe which removes the precats and is much better all the way around reduces back pressure and makes the lag lessen for sure. a boost controller on any turbo car is always a bad idea. it is very frowned on because you are not changing all parameters for lambda.

boqueron

Thanks to everybody for teh answers. My TT was bought in Germany and imported to Spain. It obviously follows the european specifications. Anyone could tell me where and how can I get the corresponding cats bypass pipes or the europipe ?

msindi

Europipe is an exhaust...Check out www.europipe.be

boqueron

Thanks

Kerry

Does the Ruf conversion give you less lag?

bigsky

Does wrapping the headers and blanketing the turbos have any negative effects? Where do we get the wrap and blankets?

Chris Y.

Chad...

How about the stock headers and K16 turbos??? Can you wrap those without problems???

PorschePhD

If you use your car in the the rain, snow etc or use it as a daily driver there are potential problems down the road. There are benefits to wrapping, but you can get a similar effect by ceramic coating your factory headers. This elements the moister factor for a street car.

bigsky

Would I notice a significant decrease in turbo lag with ceramic coating stock headers on a X50 tt?

cobra06

My thoughts on boost controllers and Header wraps, since I have both.
I've used header wraps for a number of years without problem. They do have to be layered correctly, which isn't that difficult. I've not had one problem with them in use. With the stainless headers on the TT, a flash to 900 degrees on startup will vaporize any moisture through the wraps. I feel they keep the heat from radiating into the engine deck better then the ceramic coatings. And they certainly will help to an extent at reducing lag.

I use a Hallman pro boost controller as it allows extremely fine adjustments. It's a manual unit, 20 minute install. The reduction in wastegate cracking (raises the cracking pressure) is significant. Boost is there while cruising (usually .3 BAR) and becomes more instantaneous on acceleration . I dialed in an extra .2 BAR and noticed no increase in EGT and minor changes in A/F at 1.3 BAR , ( my software has a 1.1 BAR limit).
I think to an extent with monitoring they are booth viable options and with header wraps (Thermo-Tec) you don't have down time waiting for the header to get back from the shop.

cjv

I have used ceramic coat and wrap. The ceramic coat is good the wrap is better and more noticable in reducing turbo lag. Sorry, I do not have any experience with the stock headers. The turbo blanket would help a stock K-16 reduce turbo lag.