low speed needle

[idk.net]

hey, what exactly does the low end needle do and where is it on a GT2? How do i tune it? noobish I know but I am a noob so whatever.

 

[Scrogg]

It's the screw head that is on the side of the carb, right below the throttle linkage connecting point.
Turn it in 1/8th a turn a time, run it around for 2-3 minutes before you adjust it again.

 

[olds97_lss]

The low speed needle (LSN) adjusts your fuel/air mix from idle to about 1/4 throttle.
The high speed needle (HSN) adjust overall fuel flow but is generally adjusted when you want to adjust performance/temps from 1/3-wide open throttle (WOT).

If the HSN is screwed all the way in, it will not allow fuel into the carb. If the HSN is adjusted, it may affect the LSN, so it would need adjusted as well.

Download and read this. It's a lot of words to cover a lot of details, but well worth the read:
http://home.comcast.net/~98gmarquee/pics/misc/ParisRacingEngineTuningTechTips.pdf

 

[idk.net]

Thanks for the help!

I'm still working on it and thanks for the help.