Get a set of RH needles, use the .100 jets, and you will be in the ball park
depending on how modified your engine is. E-mail off list if you want to talk
more. We still have some of the other needles around that we tried. Good luck.
Dan & Susan
> Howdy Roadster Fans,
> I had the G Prod. 1600 race car out at Waterford Hills this past weekend.
> It was hot, humid, eventful, and successful.
> 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. My lap times were back to normal, but I was also
> still having the same carb problems. I passed three people on the track,
> and two cars ahead of me dropped out, including the only other car in G
> Production. On the last lap it started to rain, which made for some
> interesting driving considering I was on full slicks!
> Sunday the weather was still hot and humid. I tried playing around with
> carb dashpots, but this didn't affect things. So, I'm convinced I need a
> different needle profile, which I'll probably wind up making myself. I
> finished the race ahead of my competition who was struggling with
> overheating problems in his Fiat X1/9. I battled it out with a Spec. Racer
> most of the race. I was much quicker than him through the corners and under
> braking, but under power he had the advantage. That will be less of an
> issue once my carbs are properly sorted out.
> For the final race on Sunday, I decided to lean the carbs out a bit, to see
> if that would alleviate the low rpm bogging, and to shift early to keep from
> running the car too lean at top end. It was a fairly uneventful race once
> we all got around the spec racer spinning in the middle of the track at the
> start! Thanks to my Datsun's reliability (and the lack of my competition's
> reliability), I took 1st place in class for the Feature race on Sunday.
> My next race weekend will be Sept. 8-9 at Waterford Hills. Hopefully, I'll
> have some time between now and then to work on my carbs. I'm planning on
> installing an O2 sensor, and there's a few small things here and there that
> need to be fixed.
> My lap times have pretty much stabilized. In order for me to go faster I
> need to fix the carbs, and get more power out of the engine.
> Happy Roadstering,
> Chris Coker
> 69 1600 SPL311-24529 <http://members.home.net/cfcoker/roadster.html>
> 6? 1600 GP Race Car <http://members.home.net/cfcoker/racecar.html>
> Royal Oak, MI