hi!

Do we need to let the car idle for a while before turning off the engine? I found this and feel like you can do all in one unit here. Plus you could save money for $200+ voltmeter and speedometer, because this one has them built in!

Any thought?

 

...with the SPI twincharged set up maybe.

 

Certianly more critical in a turbo application, but with any forced induction setup, you want to be sure that the car remains in idle for at least 30 seconds (longer depending on how long you've driven) so you don't have oil or any fluids sitting on a hot engine where it's prone to sludge up.