I stopped to asks the guy down the street about his little mustang 2 and I end up with a carter carb He told me it was a set up to flow a 1000 or 1100cfm he showed me the carb attached to a chevy which was supposed to be super charged and JUICE ? the carb looks brand new. He let me take it home and give it a try.I put it on my buick 455. The intial throttle response was great. but I think the secondaries are coming in to quick.because if I put it to the floor it dies. but if I get my RPM's up with a power break the car just eats its tires. and it runs smooth as can be. it pulls really hard on the highway. unless I floor it, if i give it a steady pedal it will just keep pulling. I needed to use a spacer on my stock intake and I think it needs to be a different one becuase I get a slight hesitation when I start. and I had to fabricate the throttle mounting plate. he is willing to sell it to me for $100.00 and I just sent my QJET to john osborn for a redo. which I am looking forward to getting back. I am thinking that a good usable carter thermoquad for a $100 is something I should take. even if I only to see if I can get it to work propperly, use it if I can or if not sell it. Any thoughts on the carb would be appriciated Joe B.
Thermoquad Joe If it is a thermoquad, then $100 for it is cheap, buy it. Does it look like the one in this picture?
NOT QUITE here is a picture of the carb. it does not appear to be the same asthe the one pictured. This is the carter afb compition series. with mechanical secondaries. the number stamped on the front pass bases is 9755s 3185 I do not know what this means but i assume it is some type of model or serial number. I was out again tonight cruising on the highway and it sure has a lot of top end. but deffinately needs to be tuned or set up for my car. if I keep it. Joe B.
This one is a 600 CFM from Summit Racing I think the largest one available at one time was a 750 CFM. Your number 9755 may be the 750 CFM version. How you would get 1000 or 1100 CFM out of a 750 CFM is beyond me. uzzled:
as I look and try and research on the web It is beyond me as well. thats why I keep asking so i do not spend my money foolishly. and I thank each and every one for their input, I have been able to keep a lot of my hard earned money buy asking a lot of questions thaks Joe
I don't have my carter book at home but I'm pretty sure the biggest AFB carb is a 750 they are almost identical to the edelbrock carb. I think to get into the 1000 cfm range you have to have the one that says thermoquad on it HTH
Save you're money and find a good Q-jet, T-Q, or even a Holley. A lot of it depends on your engine combo but its pretty fair to say that the AFB you have pictured won't out-do a good Q-jet.
It's Not A Thermo Quad! Hey Joe, The carb you have there is not any type of Thermo Quad. It's a Carter AFB series carb, probably around a 600cfm. I'd save your money!!!:TU: Here is a pic of a 1000cfm Thermo Quad!!!!!!!!!
Thanks for the Input. Thanks for the input. I will be returning the carb today. At least I got a chance to drive the car while I am waiting for my carb to get back from John O. I guess this just shows me how far off I was on my carb. ethier that or spending a week driving my ranger has me so sedated that any chance to drive my buick is thrilling. Joe B.
Does anyone have a list of what the big Thermoquads came on and what I am most likely to find one on? What sizes did they come in?
The 850 and 1000 CFM Thermoquad Competition Series were only available as over the counter add-ons. It's doubtful you'll find many of these setting in the salvage yards.
