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digest number 1239
Posted: Fri Apr 20, 2001 6:26 pm
by Garys Mail
The other problem
is I don't understand the way the choke operates. Does it lower the
jet? Does it open the butterfly further? If it only lowers the jet,
then I know I just need to richen the mixture somehow.
The choke is really an enrichener. It allows extra fuel to flow.
The surging is probably a lean surge created by the new filter being less
restrictive than the old one. I would try moving the clip down one notch on
the needle. That should do the trick.
Gary B.
digest number 1239
Posted: Fri Apr 20, 2001 6:31 pm
by geoffluttrell@yahoo.com
Hello Gary,
Thanks for the tip. I'll give it a try. How does the choke enrichen
the mixture? The actual mechanical happenings, I mean. I guess I
can look at a diagram. What an idea!
Take care,
Geoff
--- In DSN_klr650@y..., "Garys Mail" wrote:
> The other problem
> is I don't understand the way the choke operates. Does it lower the
> jet? Does it open the butterfly further? If it only lowers the jet,
> then I know I just need to richen the mixture somehow.
>
> The choke is really an enrichener. It allows extra fuel to flow.
>
> The surging is probably a lean surge created by the new filter
being less
> restrictive than the old one. I would try moving the clip down one
notch on
> the needle. That should do the trick.
>
> Gary B.
nklr carb jetting
Posted: Sat Apr 21, 2001 9:55 am
by Ted Palmer
BKGADGET@... wrote:
> Wish I had you around years ago when I was racing a Mini Cooper S to help
> tune the carbs.
Carbys are the easy part, you can do a crude dyno job in the backyard
running the engine against the brakes with a Colortune sparkplug in
the motor.
A good supply of needles and charts is needed, of course.
However, getting the timing advance curve right needs a real dyno.
I've spent some time in the international Mini mailing list but the
volume got too much for me, about 150 posts per day was not unusual.
Datsun Z list volume is much more managable.
Mister_T