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help with jets

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help with jets

Postby indy500 » January 6th, 2002, 9:18 am

i jetted my sled down 2 sizes 350's to 330's it s a 1998 indy 500 and when it got warmer like -1 up it would get real boggy so i jeted her down will this ever cause any lean problems?. i jetted her from -12 to +5 and it rearley goes below -12?
98 indy 500,
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help with jets

Postby Snotcicles » January 6th, 2002, 9:57 am

Are we talkin' celsius or farenhiet? Well it doesn't really matter. Just remember that the colder the air, the denser the air. The higher the altitude the thinner the air. If your jetted for 0 c/32 f then you might be a little on the rich side for most riding. I jet for the 10 f range and find thats pretty safe.
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help with jets

Postby JLH » January 6th, 2002, 10:18 am

All you have to do is the choke test. when your going alnog wide open pull the choke if it slows down you are rich if it speeds up you are lean.
This usually works good for me.
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help with jets

Postby indy500 » January 6th, 2002, 11:45 am

celsius
98 indy 500,
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help with jets

Postby straycat » January 7th, 2002, 12:39 am

The choke test is a good one. The only prob. with it is if you are too lean and you are at WOT, You can burn a piston. The best way to tell if you are rich or lean is to instal exaughst temp gauges.
With the exaughst temp gauge you can see what your engine is doing at any givin time. Idealy You want to run about 1100-1300 deg. if you are to rich the temp will be low. to lean and the temp will be above 1300 deg. and you could burn a piston.

*This Message was edited on 07-Jan-02 07:42 AM by straycat*
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