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Author Topic:   quadrajet building
Dirt Full Roller

Total posts: 29
posted November 19, 2005 10:18 AM  
we have been given the option to run a 600 holley or a 750 quad. i found 2 quads at the local junk yard. does anyone know where to get performance parts for one? its a non computer quadrajet..

James Ott
Dirt Maniac

Total posts: 142
posted November 19, 2005 12:14 PM  
Pack the best of those two puppies up real nice in a box. Write down your class rules for carb, motor, waht your running for a tranny, cam, intake, and what you plan too turn for rpm's. Take that box and ship it too KP (Kinectic Performance). K?

Dirt Forum Champ
Total posts: 5429
posted November 19, 2005 01:04 PM  
Maybe ya just didn't have the right builder modifying them....

email me, if interested:

Dirt Forum Champ
Total posts: 782
posted November 19, 2005 10:20 PM  
Quadrajets are good when they work but they don't like to work very often. I had one reworked and it still didn't work right half the time.

nine finger
Dirt Forum Racer

Total posts: 89
posted November 20, 2005 05:19 AM  
nothing wrong with quadrojets they just dont run right if you do shoddy work. you cant run a quad without a good filter.a good quad will support over 600 hp easily on gas...

James Ott
Dirt Maniac

Total posts: 142
posted November 20, 2005 07:27 AM  
Gee I was thinkimg the same thing there must be millions of Quads out there. If your track says 4 barrel stock what are you going to use? I know two 2G's on a tripower intake!!!!! LOL give me a break. I've only been on this sight for 3 months and getting sick of the childish comments when some asks a perfectly good question. People come here seeking information and to share information, not to read postings of dumb nicknames for legitimate parts. It would be a full time job to dump that **** off this website. I have heard lots of negative comments about Holly carbs as well, The one I owned had a nasty habit flooding at a will and totally at random. A Quad in the hands of a good builder can be come quite a weapon.

[This message has been edited by James Ott (edited November 20, 2005).]

8 fan
Dirt Roller

Total posts: 10
posted November 20, 2005 07:35 AM  
Rochester carbs are dam fine carbs, and will out perform a holley any day!!! They are all we are allowed to run, and I have never heard anyone complain about them yet! You can get a manual called Rochester Carburators from HP books, it will tell you everything you need to know about tuning these carbs yourself, and you can get parts from Edelbrock for rochester carbs.

Dirt Full Roller

Total posts: 31
posted November 20, 2005 08:36 AM  
If i had to make the choice i would go with the holley but i have also had good luck with quads and you can find them everywhere,And James Ott-Mello out man,Most of these comments are opinions and suggestions from personal experiences dont take them personal.I read from alot of forums and this one is by far the best!!

James Ott
Dirt Maniac

Total posts: 142
posted November 20, 2005 01:14 PM  
Oh no doubt it is the best of all forums I've been on. Informative, funny at times, thought prevoking and usually very interesting. I was merely pointing out that if someone posts a question I'm sure they are looking for tangible information that they can use to make an informed decision. Comments based without supporting facts don't relly help anybody. OK I'm done, but man this sight is very helpful so I will hang around awhile longer

poorboy racing 53
Dirt Full Roller

Total posts: 32
posted November 21, 2005 08:54 AM  
I think the reason I like the Holleys is I feel they are easier to tune. Just to set the floats an a Q-Jet you need to take the top[ of the carb off. I don't think I would wnt to do that at a dirt track with all the dust and stuff in the air. I think Holley's and Q-jets are like Chevy and Ford. They both work and people will stand behind both.

Dirt Roller

Total posts: 8
posted November 21, 2005 06:24 PM  
I know its not cheap but I was told that buying a brand new Quad is the best way to go. We have to run Quads too and I had nothing but problems with my three last year. The funny thing about these carbs is that they always ran very good (and were very fast) at high RPM`s, but had trouble staying running at idle. I think Quads have a mind of there own, but if you get one dialed in they are very fast!!

Dirt Full Roller

Total posts: 60
posted November 22, 2005 03:58 PM  

This I know from experience. A new QJ is set up for street conditions and normal performance. I paid 389.00 for a new one from O'Riley's. I fought with that thing for a month until someone finally tuned it for me to run wide open, then off, the wide open, ....ect.

Now this winter, i am gonna send my 400 dollar carb to Kinetic to get done up right. And, correct me if Im wrong KP, but I believe it costs the same to get an old carb done as it does to get a new one.

Listen to James, send it to KP and you wont be dissappointed.


Dirt Forum Champ
Total posts: 1023
posted November 22, 2005 05:33 PM  
Ya took the words right outta my mouth guys...First, depending on the specific engine for this class we're talking about, a properly built 600 Holley could be perfectly fine and enough carb for the job here. A quad, because it's vacuum-operated, will more than likely feed this type of engine somewhere between 600 and 750cfm. That little extra bit of available airflow in the quad is not necessarily going to make the car dominate above a Holley. It's all about how either carb is matched to the engine. So both carbs could be built to win races.
Secondly, there is no such thing as a NEW Quadrajet. Rochester (and in later years, Carter, who bought 'em out) stopped making new castings many years ago now. The only thing out there now are re-done cores, and the mass-produced "reman" carbs are exactly that...MASS produced, and not set up for anything in particular, not EVEN the street, as they still need to be fine tuned on the specific vehicle.
Now, what sets Kinetic Performance apart is I'll personally work with each customer's engine specs and directly tailor every detail of the carb to that motor. In fact, that is what I do with EVERY make, model, and style of racing carb I build. I will never mass produce my products.
Anyway, thanks for the compliments and confidence, everyone. I'm always working 110% to get each customer what they deserve, and at the most fair price anywhere...AND with after-sale support and discounts for returning customers as well.
OK, 'nuff of this shameless plug. :-)
If anyone needs more info, or is interested in working with us, don't hesitate to email me here:
or call our shop/home #: 607-277-6462.
We aren't working full time days at the shop (yet), so the best times to call are around dinner time weekdays or most anytime before 8pm weekends. Leave a message if ya miss me, and I'll return everyone's call as soon as possible.

Thanks again,
Dayton Umholtz, co-owner
Kinetic Performance

[This message has been edited by KPLugnut (edited November 22, 2005).]

Dirt Full Roller

Total posts: 32
posted November 27, 2005 07:15 PM  
I've never had the privilege of working with one of KP's carbs, but a number of years ago when I was allowed a "stock" 4 barrel, I had a quadrajet that was worked on by Lingenfelter Engineering in Decatur, IN. I ran it on a 350 and a 400 small block, and it kicked **** on either one, so I know for a fact that a Quadrajet can be made to work, and work well, on dirt track.


When the drops the stops!!

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