HKS have the best one on the market. Not sure if they have wire harness for 993tt.
http://www.hksusa.com/categories/?id=1091

 

Has anyone seen a turbo timer on a 993TT? I thought this came up last year and the someone said they won't work with the drive block.

Greg H.

 

I have to admit that I don't let the car cool off at all before shutting it off (except at the track where I let it cool off for at least 5 minutes).

And, I have no intention of doing it, even if it is recommended. That's just a plain pain in the ****! I bought the car to enjoy it and not baby it. I'd rather have the turbo seals replaced more often than set at a gas station for 2 minutes before shutting it off... In my view, if the car needed a turbo timer, Porsche would have put one in...

 

Illegal in the UK anyway. Doesn't stop lots of the jap boys having them (Skylines, Imprezas, Evos, etc.).

 

Pete, Porsche has requested it's owners to idle the car temps down. The heat soak is also tough on the ceramic liners in the cylinder heads.. All the heat just radiating.. I have to upload some pics..

 

I know the drive block makes it hard to do a turbo timer but does it get easier if you've had your ECU tweaked to remove the drive block?

 

Just to be clear, are we talking about always cooling it down, even when running to the grocery store, or are we just talking about after a hard run?

I just don't see how there could be that much more heat in these cars compared to any other car after driving it normally around town... In the end, the heat is a function of power so if you drive it normally, the power output is low and hence the heat output is low.

What am I missing?

 

Common sense tells me that it's not a good idea to let the an air cool car sit and idle every stop unless you have been running high boost.

 

I say to cool down these cars everytime, to at least 2 min.. However, try to at least do it 1 minute.. There is never a short grocery run in these cars.. If you guys seen how your headers and turbines heat up and glow in just moderate boost levels you'd be cooling the engine down. Again it is the oil that we want circulating through the bearing housings, and sump system.. It is the oil cooling down the topend, valvetrain, rods, pistons.. We don't have the luxury of water-cooling..

 

Here is a picture of a turbine wheel from a 993TT that has 55K on the clock. The 2 owners did not give a **** about cooling the engine down, let alone the turbochargers. If you can look at the shaft you have a blue temp moving from the turbine wheel head all the way to the compressor side bearing and past it.. That 700 degrees folks.. If you look closely at the turbine wheel you can see the knick taken out of the blades.. This is NOT from valve train damage but the ceramics cracking and breaking up out of your exhaust ports. The customer was so upset that he did a top end rebuild which included replacing 2 cylinder heads.. $1,400+ each..

 

I must also note that I put this wheel in the hot tank for 8 hours. You can still see the carbon build up around the cooked sealing ring. The bearings on this turbo were okay.. As I have always said, these turbochargers don't have a problem with it's bearing system. But due to heat, it takes a toll on the sealing components.

 

I just don't get it...

I thought air cooled meant runs cooler when moving, not sitting. The only time my 97 turbo starts to get above 8 o'clock is when I'm sitting in traffic idling.

 

So, what tuner will send you a part to remind you to cool down your Turbo? Yep, I just received the above in the mail yesterday along with the final Stage 1 invoice.

Thanks Kevin! I'll try for 1 minute cooldowns and we'll go from there

 

Good one Kevin!!

 

So, out of curiosity, I'd like to see pictures of my turbos (since Kevin has them as cores). They have 38K miles on them, 4 owners, and I put 6 track days on them.

Kevin, can you post the pics when you get around to using my old turbos?