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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