Originally Posted by
Mathiew
Here's a thing i don't understand:
If i pinch the fuel line to test the idle gap, i have to listen to the engine rev up.
But in same time, if the LSN is not set right, HOW can i know if it's the LSN or idle gap who's not set correctly
You say that the engine must rev up slightly and died in about 5-7 sec to be correct with idle gap. But if the LSN is too lean, the idle will goes up too and the engine will stall before 7 secondes, but what tell me that's the LSN who's too lean, or the idle gap who's too wide open???
When you are checking the idle gap, the length of time the motor runs on is irrelavant. It's the amount it revs up you are worried about.
If your testing for LSN tune, then the amount of time the motor runs on is relevant (but also if setting the LSN you want the idle gap to be correct too. Because this will effect LSN tune).
Always set the idle gap first.
As matrixmaike 28 pointed out, the pinch test is a good reference tool and gets your settings fairly close. I should have perhaps pointed out that the only way to get things tuned precisly is to do what matrixmike28 described in his post. As you should be tuning for the track conditions you are running. Tuning on the starter box without running the buggy is not going to result in a great tune. So use the pinch test as a reference to get things close, then fine tune from there.
Hope I haven't confused the issue for you
