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View Full Version : What size main jet with new pipe?


ragin cajun
03-30-2004, 10:32 PM
I have an aftermarket pipe on my 350x and was wonderin what main jet I should run now? Stock is a 138.
edog
03-30-2004, 10:43 PM
you should drop it one size.Go ahead put on that low restiction K+N filter. -D
superman
03-30-2004, 11:12 PM
wouldnt u go up 1 size not down ,espicially with a k& n plus exhaust
ragin cajun
03-30-2004, 11:50 PM
You would definately go up not down. I just need more of a starting point.
TimSr
03-31-2004, 12:02 AM
Start with your current jet and take some plug readings. There is not set formula. You may not need to change it at all, or you may need to go up or down. Im amazed people can tell you what jet size to use on an "aftermarket pipe" when you didnt even mention what kind of pipe it is! This is like the Jetting Psychic Hotline!
XDAWG
03-31-2004, 01:34 AM
This is like the Jetting Psychic Hotline!
:D :D
twgranger
03-31-2004, 04:44 PM
you should drop it one size.Go ahead put on that low restiction K+N filter. :-DDon't listen to edog. He hasn't hit puberty yet. :D