930 Newbie Questions

[targa todd]

Search has been my friend since I bought my 930 last week. A number of my questions have been answered. I knew these cars were more complicated than normally aspirated 911s, but I'm still amazed at the complexity difference.

Here's a couple of things that I'm still curious about:

1) I know that a 1 bar w/g spring is a bad idea in an otherwise stock car. I've seen threads indicating that you risk damaging your engine without a bigger turbo and intercooler. My question is: what about a 0.8 bar spring? My car's PO installed it but I have the stock spring (0.6, right?). My car definitely has a stock intercooler and I'm pretty sure it has a stock turbo. Should I go back to the stock spring for the long term health of the engine?

2) The car seems to run a bit after shutting it off. This seems to be more common when the car is warmer. You know: sputter, sputter, rumble....off. Is this normal?

3) I'm following kilodawg's thread about black smoke under heavy acceleration. black smoke and fuel heads (turbo newbie). I can't see it myself, but I'm told mine does the same thing.

Any help, experience or comments are appreciated.

Todd

[NathanUK]

1) If you are only using the car on the road and not a track you should be fine with 0.8

2) Yes, this is normal and I noticed it too compared to my 3.2 carrera. The idea is all fuel is burnt in the engine. The ignition stays on for say 2 seconds.

3) Get an AFR setup. Have your oil level on the stick halfway between the two marks when hot as oil can get sucked in...

[Miguel Antonett]

.8 is the standard WG spring.

Under "heavy acceleration" there is a lot of fuel being burnt, some black smoke is normal.