Hudlett Carb

Don Zerangue · Posted: Sat Nov 03, 2001 2:10 pm Post subject: Hudlett Carb

Is anyone using the Hudlett Carb? What are your results? What are some of the problems, if any? Thanks for your reply!

John Denman · Posted: Sun Nov 04, 2001 6:47 am Post subject: Hudlett Carb

The Hudlett Carb offers some great features on the surface, but may have some flaws.

External adjustability is a big plus especially in areas where the air density changes. While a dial-a-jet can accomodate these changes, in many cases it seems to lead to other problems like flat spots.

As the venturi gets larger, the responsiveness to throttle position tapers off somewhat and float type (or pumparounds) suffer from not having the range of pressure differential to maintain optimal mixture and fuel atomization.

A pumper carb has a bit of "power assist" to overcome the pressure differential problem of a large venturi float system. Better atomization and more consistent mixture optomization through the range.

But they may have a few pitfalls. It has been reported that they are prone to sticking motors. Whether thats due to operator error or an internal problem is debatable. I have no experience and cannot comment one way or another.

We considered testing it, but in the classes we are running for 2002 they will not be allowed.

We are testing the Edelbrock Qwiksilver and have provided reports in another thread.

Guido Duerbaum · Guest

Don, I have one since 3 years and I still use it. Since I have worked with Jeff I have acess to any Carburetor and yes he also makes very good Floatboal type Carbs.
You need to have experience in order to tune the pumper correctly, it is much more agressive and harder to drive but I like it, it comes much better at low rpm's and it is cleaner, no fuel spill what so ever.
In a rain race it is very easy to ajust to the weather change but it comes on very hard once you hit the throttle, takes time getting use to it. The down side is, just like on a fuel pump, the diaphrames need to be replaced from time to time.
Hope this info helps.

Guido Duerbaum
Advanced Karting
Home of the FITTIPALDI KART

Don Zerangue · Posted: Sun Nov 04, 2001 3:03 pm Post subject: Hudlett Carb

Guido,
I'm a 61 yr old Mika Hakkinen "want-to-be", driving shifters for fun with a few races now and then! Driving a new Diablo with a Paul Leary Cr125(all the bells and whistles far exceed my driving ability) and enjoy experimenting with the hi-tech stuff. Enjoy the wide open tracks like IMI north of Denever or Streets of Willows in Rosemond

Give me some advice as to posibly preventing sticking my engine with this carb(we've stuck a few with the other carbs). We've built up a "99" Trackmagic Demon with a blueprinted YZ125, all decked out with all the race logos for our "want-to-be" Shumacher friends who don't own karts----I suppose this would not be the carb to put on this kart.

Thanks for your input!

Don

bill gillespie · Joined: 23 Jul 2001 Posts: 54

hi don,
my son ran the hudlett all yearin skusa s1 .he won the s1 regional championship and set pole at the skusa long track nationals....there are some tricks to the carb, but i don't believe the carb ever caused a stick.....egt is almost mandatory with this carb...especially on a long track
call if you want details.
bill gillespie
770-251-4340