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Author Topic:   carb "gauges"
dode
Dirt Freak

Total posts: 417
posted November 12, 2002 09:33 AM UIN: 13209501
My track says they have "gauges" to check Holley 500's with. What are these, and what do they check? What can I still do to a carb that will still pass these gauges? Thanks.

John

dirtbuster
Dirt Freak

Total posts: 353
posted November 12, 2002 09:36 AM
My guess is they are to check the size of the throttle bores.

KPLugnut
Dirt Freak

Total posts: 408
posted November 12, 2002 10:17 AM
It all depends on how many guages they have, as to what you will be able to do. Typically, tech inspectors are using a combination venturi and booster guage, which checks the venturi diameter, booster OD, ID, and height. There's a separate guage that measures more accurately the booster height and other dimensions, too.
Then, the considerate tech men will raise the carb up (without flipping it over) and measure with one or more other guages, the throttle bore diameter, and the combined thickness of the butterflies, shafts and screws. Then, if they're REAL picky, they'll use yet another guage to measure the distance from the bottom of the carb body (with baseplate and gasket removed) to the bottom of the boosters. All that, like I said, is done by GOOD tech men without flipping the carb upside down.
Of course, we've all seen tech men who roll a racer's carb around on the bench trying to figure out which guage fits what hole.....ugh....LOL!

There are also (in extreme cases) pin guages out there for measuring every little orifice and fuel circuit in the metering block, body, etc. Most tech's don't bother, tho.

So, depending on what your tech inspectors are going to measure and require to be left untouched (or not altered enough that the guage fails it), you can alter everything else in the carb.
But the sweet combinations of both perfectly performing carbs and ones that are still legal in every dimension both externaly and internally is where the carb experts spend most of their time. :-)

Hope that helps....

KPLugnut

dode
Dirt Freak

Total posts: 417
posted November 12, 2002 10:35 AM UIN: 13209501
As always, KPLugnut, you have a most excellent reply. I and I am sure many others have learned a great deal from you. When we get to the point where we are able to buy a "good" carb, you will most definitely get our business! Thank you very much.

John

KPLugnut
Dirt Freak

Total posts: 408
posted November 12, 2002 11:20 AM
Awww shucks....just bein' one o' the guys....(shufflin' feet)....

You're most welcome, John!

KP

nuts4racing
Dirt Roller

Total posts: 9
posted November 13, 2002 07:46 PM
K.P., I was curious, how long have you been involved in racing? You are a very knowlegable person (not to mention a very technical one as-well). I usually have to read your post's two or three times (sometimes more) just to get half a clue as to what your saying!! I'm no dummy by any means but dang your good! Keep 'em coming I'm learning stuff I never new existed. THANX!

[This message has been edited by nuts4racing (edited November 13, 2002).]

dreamcatcher
Dirt Maniac

Total posts: 128
posted November 13, 2002 08:41 PM UIN: 14464409
i totaly agree, when i read a response from him for any thing i try to remember it. his knowlege has come in handy more than once. thank you kp. charlie norris


KPLugnut
Dirt Freak

Total posts: 408
posted November 13, 2002 08:54 PM
Gee, you guys are too kind. I'm flattered. Honestly, I enjoy this place (and others) because it contains about the largest gathering of real racers striving to improve than anyplace else on earth, it seems.
It's all of you that make this place great, and not any one person.

As for myself, I've been actively involved in racing of one sort or another for almost 30 years, but have been concentrating on helping all racers at all levels in any way I can for only the past 6 or 7 years. Before that, we were involved in many ways in the northeast here on both pavement and dirt.

One thing anyone who knows me will agree on, is that I'm not good at "tootin'" my own horn, so believe me, it's not easy to even sit here and spill credentials. I'm just a guy who loves helping in any way I can, but I'm wrong, too, sometimes, so here's my chance to remind everyone to please call me an idiot when I need to be knocked down a notch....:-).

Thanks, guys, ya made my day!

Dayton Umholtz, owner
Kinetic Performance http://www.kineticperformance.net

dode
Dirt Freak

Total posts: 417
posted November 13, 2002 09:01 PM UIN: 13209501
You're an idiot...

...for not tootin' your own horn once in a while. You are very knowledgeable, and I don't know about anyone else, but I don't forsee correcting you anytime soon. I think I speak for many others when I thank you for taking the time to help people around here.

John

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