I modified a 68 350 carb 7028244 for performance using the Cliff Ruggles book. WHOAH what a difference! outstanding idle, vastly improved throttle response, Lots more power throughout the RPM range. I have nothing but good things to say about the mods and their results.:3gears: WOW get the book
I've always said a good quadrajet is perfect for the 350. No need to spend money on a Holley or Demon!
Good news! We back to back, dyno and at the track my 1977 Q-jet against the Holley HP950, Demon 850, Holley 4781-2 (custom built) 850, and a custom 925cfm Holley. The q-jet made MORE power on the dyno and ran quicker at the track. The best contender against it was the 4781-2 Holley 850, making 2 LESS HP, and running .02 seconds and .30MPH slower than the q-jet. We did the dyno testing with the Holley against the Q-jet as part of a magazine article for HPP and Popular Hot Rodding's "Engine Masters" edition. We spent an entire day on the dyno, the re-installed the engine and they rented the Norwalk Ohio dragstrip to run the car on for an entire day. The tests were witnessed by a representative from the magazine, track officials, and many others. They did NOT reflect the results in the ariticle(s) that followed....wonder why?......Cliff
Highly unlikely. There is still a very good supply of the late model cores, which we prefer, and use for almost all of our custom street, street/strip, and full race units. The later units are usually passed up by folks looking for the early holy grail stuff, so the prices are still quite reasonable. I try to save most of the early stuff for the restorer's, and other than some pure stock or FAST cars, and once in a while a Stock or Super Stock application.......Cliff
Odd number? Cliff, I saw a Rochester #7043282 on E-bay. It was listed as a Buick model but if I am reading the numbers correctly, it is either a 1973 Marine or Checker model? Is this correct? Does it have any collector value? I will be using the book to help me rebuild both a 750 and an 800 (7029240 MD and 7042240 MB) that I have on the bench now for my 430. Just received the rebuild kits and parts from Gessler this week.
Re: Odd number? I actually prefer a Q-jet or a carter. much more easier to work on. I HATE holleys. too hard to adjust and runs like crap. I put a performer intake with a holley on my old 70 GTO. Never ran right at all even after getting a speed shop to adjust it. wound up going back to the Q-jet. Cliff how can I get this book? Tim
Do you think that the adjustable part throttle feature (apt) of the later q jets helped in this testing? I have been using the 72-74 800 cfm Q jets from Buick 455s but thinking about trying out one of the 80 Buick 350 carbs I have since it has the APT feature.
