Check out the new carb by Bill Mitchell. I know he is a chebby builder but we have to get parts where we can get them. Its on page 87 of the the October issue of Hot Rod. It is kind of a cross between a Q-Jet and a Dominator. Sounds perfect for a Buick.
I just emailed him with a few Questions . Hope it will work on my 455 . The 750 Edlebrock seems a little small and burns rich all the time. We will see. Thanx for the tip ! :laugh: :TU:
seems like it could produce a windshied kissing bog, since there is no secondary air valve adjustability like the q-jet, avs carter or the holley vac. sec., beware of the "trick-of-the-month". good luck
Trick-of-the-month, that is a good one, right on target. We tried this split sized bores thingie when I worked at Holley years ago, and one that was a three barrel, two primary plates, one wide secs one. The 3bbl was golden, the spread bore was a joke. Now, we also tried a 4 bbl, very different, was built like the 3bbl, but with two plates in the center, one oval plate like the secs of the 3 bbl, on both ends of the carb. What a neat carb, but was just too expensive to produce and sell back then, would have needed a special manifold, just wasn't possible. Carb was way ahead of its time, still might be.
The trick may be in hooking.:Brow: I've been driving buick big blocks since 1985 and have never found one that didn't improve with machanical secondaries. When you buy a holley for a buick don't buy one vaccum operated rears. Qjets had machanical secondary operation with a cold motor lockout feature. My Comp. series thermoquad 1000s have machanical operation. My Holley is a double pumper. Never a bog. Bog is from a lack of fuel. Holley uses rear squirters to cover up the period of time it takes for the main circuit to start flowing. Qjets have a similar inrichment that emptys a fuel well in the bowl. Takes a few seconds to refill after each use. Thermoquads have very quick operating rear circuits (race version). I still modified mine for some pump shot in the rear doors. I don't really think you could over carb a health 450hp or more buick 455. They love very large carbs with machanical secondary. Air velocity is the key to this fact. Buick motors have a very strong signal. They do not respond like a chevy or pontiac. Huge bore short stroke and relatively small intake runner volumes means a very strong carb signal. I find problems tuning small holley (850 or less) for my motors. They always seem to have a rich hook in the higher rpm range. I think its safe to say, dont be timid about your carb size selection. Bigger is Better!!!
