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Home » Public Forums » GMCnet » [GMCnet] Injection versus Carbs
Re: [GMCnet] Injection versus Carbs [message #74255 is a reply to message #73254] Thu, 18 February 2010 14:11 Go to previous messageGo to previous message
g.winger is currently offline  g.winger   United States
Messages: 792
Registered: February 2008
Location: Warrenton,Missouri
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Senior Member
I am not an expert on quadrajets. Have rebult a few. I have ruggles book and all would benifit reading it even if you never plan on turning a wrench on your carb. I've read it THREE times. Purchased Ruggles rebuild kit. Very expensive but worth it. The APT system,,,plunger,hangers,rods and spring are adjustable by the screw but it only adjusts how LOW the rods go when Vac. holds down the plunger. When vac. drops, up go the rods and you are richer. It does NOT adjust how high the rods go or when. When is adjustable by which spring. AFR is adjustable by which rods AND which jets the rods are in. You really need to read the book. Having a difftrent carb for altitude change is a novel idea BUT, it would need to be EXACTLY the same, lots of small passages in a quadrajet. What I mean by the same is to quantify changing to a diffrent carb with only diffrent rods or jets all the other passages are not the same, you cant tell if the jet change is what made the diffrence.

Paul(whos going to start a fourth time)Leavitt
 
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