Brian,
Thanks for the vote of confidence! ;)
Here's some pics of some needles that I posted a couple years ago. I need to
update it and make a couple corrections.
http://www.2xtreme.net/fredkatz/carb1.html
Last time I bought needles from a vendor, I got the matching jets with them.
That seems the best way to be sure they'll work, rather than guessing as to what
size jets are in your carbs.
Fred - So.SF
______________________________ Reply Separator _________________________________
Subject: RE: Carbs and rear end noise (the car's)
Author: "Brian Hollands" <bholland@hayes.ds.adp.com>
Date: 7/24/2001 7:46 PM
Fred wrote
I'm a novice in experimenting with needles, but perhaps your jets are
mismatched to the needles
Just a guess but this made me remember a posting from a couple of days ago.
* My carbs have never been quite up to par, so I was going to try and play
> around with the setup a little. For the practice/qualifying session I
tried
> out some N-17 needles with the .100 jets. The car sounded absolutely sick
> until I got past 6000 rpm, and then it would run decent. I was three
> seconds a lap slower, but I was able to home in a little on why the car
> wouldn't run past 6000 rpm with the other needle/jet setup. I qualified
> 18th out of 19 cars.
>
> For the race on Saturday, I put the old .090 jets back in, and decided to
> try some FX needles, which are richer in the top end than the M-39's I'd
> been originally using.
I never realized that there are different diameter nozzles for the
roadsters. I assumed they were all the same and that the needle profile was
the only variable. If that needle is supposed to run in a smaller jet, that
would explain the unexpected richness. Fred may not be such a novice after
all.
Brian
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