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carb selection

M

MEPR

1/2 ton status
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well im thinking about getting an aftermarket carb. But i need the truck to star emisions legal, right now it has an M4ME quadrajet. Im thinking of replacing it whith a 650 holley spreadbore. Holleys site saysit is emmisions legal and lists a part number for a 84 350 but not a 305, should both motors have the same carb needs?
 
As long as your carb only has the one plug for electric choke on it, then any aftermarket emissions legal shouldn't be an issue.

Might be some "fine tuning" issues, but I'll leave that up to folks that are familiar with Holley's.

Any reason to be dumping the Q-jet?? You can get rebuild kits for around $20, and have the throttle shaft bushed for $40 or so.
 
dyeager535 said:
Any reason to be dumping the Q-jet?? You can get rebuild kits for around $20, and have the throttle shaft bushed for $40 or so.
Click to expand...

Now there's the question of the day, especially since he already got one. Tomorrow he'll change his mind again though.
 
Now there's the question of the day, especially since he already got one. Tomorrow he'll change his mind again though.
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You've noticed that too, huh? :whistle:


I have 6 numbers and one word for you:

350, 465, 205, 14, 44, 4.10s, quadrajet
 
all of you guys can just go to you know where :blush:
I whant a carb that is easier to work on and what not,im vary familiar whith Holleys so theyre easy to work whith for me.
oh and im going to rebuild the Q-jet andif it fixes it all is well, butif it doesnt ill get the holley. Yes im netoriously undecided and have a bad habbit of thinking out loud :p:
 
I have had an Edelbrock-Holley-and Quadra Jet on my K5. The Edelbrock ran the best but sucked for wheeling. I recently switched back to the quadra jet. IMO it is the best thing for wheeling besides the Holly Off road carb.

Hope the reuild helps. Make sure you get a brass float if possible. I have heard they are the best as opposed to the plastic ones. The rebuild is pretty easy and well worth the small amount of cash :)
 
I like my truck avenger so far (holly) but really havent gotten on it yet.. still have a few things to do... Zero rates and cut fenders out more.... but once it stops raining and gets warmer out... Ill let you know (plus will have vids :cool1: )
 
He gets to have first hand experience with the avenger as soon as he wants to mess with mine. :grin:
 
hey all i just placed the truck avenger atop my old 350 and it breathes new life. man the carb is responsive. i haven t done any incline/decline yet but i do like the carb...so do all my buddies :D
 
MEPR said:
you need to fix your ignition first :laugh:
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Ran fine before you changed that clamp! I think I have tinnitus from hearing that backfire. :blush: We need to talk about this weekend too.
 
Not to hijack the thread, but I am getting ready to replace the carb on my 305. I only use my Jimmy for on-road use. What would you guys recommend? How many CFM for decent gas mileage? I read that the stock carb is over 750cfm, but I am thinking about something under 600? The current carb is computer controlled, but it isn't working. It runs super rich. Suggestions?
 
How, praytell, is it computer controlled in a 85?? I may be electric choke, but it surely can't be computerized. Yeah, the Q-Jet you have on it right now has a 30psi pump and 750cfm air flow... the best bet is to drop a Holley 600 on it, you'll get more fuel and a bit less air... and it can be calbrated to run the way you want it...

By the way, how is it running rich with 750cfm air flow?? It should be running lean.
 
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