Carb Doctor

No, Not the Dr. Atkins types, but the other kind.

I've read on here that there are carb "Experts" for Webers and Kadrons whereby you deliver your carbs to them along with a detailed description of the innards of your engine and they set them up to run correctly for you.

Does anyone know of a "carb doctor" who specializes in Dellorto's? Would be especially attractive if they worked on the East Coast, but with the parcel delivery services these days maybe "where" is not all that important.

Thanks, Gordon

Gordon,

I have DEll's on my CMC Speedster and simply picked up a book called,"The Delloroto Superformance Tech Book". You can perform Tuning, Modification and Adjustments myself because the book will answer alot of you questions. Some common mechanical knowledge would be alot of help as well.

The book cost about $10.00, I've seen better & worse Tech Books but this publication will allow you to get the job done.

Identify what you have and the book will inform you what you will need to do if you wish to alter or modify the Carb's.

You just need to have a "Clean Work Area", and some confidence in yourself.

There should be "ID Tags" bolted to the Carb's ans well as ID/Size on the Body of the Carburator. When purchasing Kits or parts, you will refence the ID Tag information & Size of the Carburator.

Carbs are not a "Black Art" but must people are scared to work on them.

Good Luck,

Jack Blake

Most of the mail order places sell the book. I think it was written by a guy at CB. A couple of other helpfull things might be to post your motor specks and carbs on the cal look forum and ask for jetting suggestions. It is a very common thing to do and it will get you in the ball park quickly. For fine tuning an O2 guage is the best.

Gordon, stay away from white bread and go for long drives.
Ron

Thanks, Doctor Ron.........Soon as I change to a lighter oil.....Extra Virgin Pennsylvania Light!

Gordon, Art Thraen at ACE does Dells. Reach him at 801 943 1234.

Eddie

Gordon,

You MIGHT consider a carb swap . . .

We replaced the dual 44 Webbers on the 1914 drag motor with a pair of Kadrons set up by AJ. VAST performance gain across all of the RPM range, rev limit went safely past 6500 as well. The car pulls similar to the way a 5.0 Mustang does, Strong and sure throughout, no "wall" between second and third gear anymore.

Just a thought, and not too expensive at all.

TC

Thanks, TC........when I was building this engine up (way back in 1997) I gave a lot of thought to what I wanted on there for carbs, especially remembering my old flat-head street rod days of triple Strombergs and over-carb'ing for the flow rate that the engine had.

I got Bob Thomlinson's book on Dells, and these 40mm's SHOULD be right for this engine/heads with the jetting I originally specified, but then I changed to horizontal discharge tubes and that may have slightly skewed my jet need (I think those H-tubes tend to make it run richer). It stumbles or "Bogs" on just about any throttle transition, especially at low speeds, and often "pops" through the carbs. That tells me it should be a little lean, but the plugs are dark, telling me it's a little rich. Pat Downs also thought it was a bit lean, too, but plugs don't lie - go figure (or maybe I've forgotten how to read 'em!).

I think Greg Billensbach (sorry if I mis-spelled that) has a 2,110 with dual 40mm Dells and started with 140 main jets, and he changed just the mains from 140's to 135's to 130's before he got it to run right - he also put an O2 sensor on it and found that it pegged at full rich until he got to the 130's.

So........ when I take a break later today from the Greenhouse build (almost finished!!) I'll order an air/fuel mix gauge and a couple of smaller jet kits from CB and get this thing done right.

Interestingly, when you really get your foot into it, it never bogs between shifts (or at least I don't feel it), but that initial launch from the line is a little jerky at times.

Ahhhhhh.....the thrill of the problem chase!

Gordon

Gordon
One more thing I did to get rid of the hesitation off the line (besides going smaller with mains after watching Air/Fuel Ration), was to go up a few sizes with the accelerator pump jets, and adjust the accelerator pump to squirt as long and as soon as possible.
So when the throttle plates start to move, the accelerator pump is squirting fuel.
My set-up is pretty stable. I get (sometimes) a very slight hesitation when cruising slow.
Driving the turnpike to Carslile and back I was getting 28 mpg.

Greg Billesbach

Thanks, Greg......

Now that I'm reading Thomlinson's book, he goes into a lot of detail about the various rpm-range circuits and I was guessing that the accelerator pumps weren't squirting quite enough to juice it off idle. It appears that these were set up with "stock for everyone" jet sizes (I doubt that they were even touched in the boxes) but the only way to know what's in there for sure is pull one apart and take a look.... :( Once I baseline them for what's in there, I'll order what I need, along with an O2 gauge.

Just as I was finishing the greenhouse, the house water pump appears to be dieing, so I guess this whole carb jet thing will get pushed off to next week as I dig up most of the front lawn looking for the damn well. And on July 4th weekend, no less!

See ya guys!

gn

Team Evil - if your engine ran better with Kadrons then the Webers must have been really f@@ked up.

George,

You KNOW it !!

When we took them off, there was sand EVERYWHERE! We all live in coastal towns and the winds are always blowing here. There was a TINY unseen gap in the one aircleaner which messed everything up. Sand all over!

We also had the wrong vents for the jet sizes and all .

The Kads DO work GREAT. We had them set to the engine by AJ and they're just wonderful. 'Cept.--you know--they don't seem to equal that first day when we took the car out on the street with the new Webbers. It seemed to run like my old Vette. So fast that it almost frightened you, almost. The Kads are fast, but not "scary fast" . . .

Do you know of anyone that is good with Webbers? We're kind of looking for someone who can recommend the vent/jet/tube/etc. combo based on the engine specs. Something to help get us back in to the ballpark at least.

Luck,

TC

TC, same as my last post above. Eddie