[79 Caballero]

Ok so heres the deal. I recently had to pull the engine from my elky to put in my truck. THe truck is an 85 k10 that is my daily driver. On my way to a wedding the 4 and 5 rod bearings seized up on me a few weeks ago. As its my daily driver I had no choice but to pull the low mileage engine from the el camino to put it in the truck. I just did a 1 for 1 swap as it was most time efficient, especially as it was 2 weeks prior to my own wedding. The elco engin now in the truck has an edelbrock 650 performer on top of an edelbrock high rise intake. The old engine had a edelbrock intake and qjet on top. Which setup and especially carb do yall think would be best for gas mileage? the truck seems to get less now than it did before but I want opinions. Ive spoke to people at work and had mixed opinions about it. Thanks

 

[87next2last1]

quadrajet !

 

[JJLT1]

Q-jet.:wink1:

 

[gilby]

..no brainer....Q-jet..Unless you want to run two fours, then,maybe. ( I'm kinda fond of Holleys 4 bbl.).:driving:

 

[MACV]

Q-Jet. :smile3:

 

[jlcustomz]

Lots of previous discussion on this comparison. The main problem I was finding when last running ELDERBROCKS on a gmc work truck was constant deterioration of mileage & running condition, The metering valves which constantly move up & down with vacuum were gunking up on me, most likely from the ethanol gas.

If you can't afford a good rebuilt quad right now, you can easily remove the metering rods & springs with the carb in place & clean if needed.

 

[steelybill]

Seems like one advantage of the Q-jet is the small primary venturis, for mileage and good low RPM operation.
The Edelbrocks have had some problems occasionally, like any other carb....

 

[chevcamino]

I have a Holley on my crate 350, and mileage is unbelievably low. And now it started to cough when I turn it off. I'll be swapping this out for a Q jet real soon, 9 out of 10 I've asked says Q jet is the way to go.

 

[EdontheBeach]

q-jet

 

[dstinch]

Sounds like you answered your question (Truck seems to get less now) Go with the Q-jet

 

[prubrew]

X a dozen for the Qjet for MPG

Chris :driving:

 

[cees klumper]

My mileage with a 454 and Qjet is surprisingly good.

 

[Beepster]

When I bought my Elky, it had an Edelbrock in it (350). Bought a Q-jet from MM (Carter-type). I had been getting 13-15 MPG, but with q-jet, I'm getting 7-10. Sooo, I just finished putting the Edelbrock back in. It starts better and runs smoother. Haven't put enough miles on it to check mileage. Had I know I would have been getting a Carter, I never would have bought. Carters were designed to be used on Chrysler products and not Chevy/GM.:-(

 

[Wayne Parrish]

X-20

 

[Jack_K]

When I bought my Elky, it had an Edelbrock in it (350). Bought a Q-jet from MM (Carter-type). I had been getting 13-15 MPG, but with q-jet, I'm getting 7-10. Sooo, I just finished putting the Edelbrock back in. It starts better and runs smoother. Haven't put enough miles on it to check mileage. Had I know I would have been getting a Carter, I never would have bought. Carters were designed to be used on Chrysler products and not Chevy/GM.:-(

That's odd Bruce. Edelbrocks are Carter copies. Q-jets are Rochester not Carters.

Jack

 

[mrblanche]

You could be radical (as I was on my new T) and get one of the new Street Demon carbs. Small primaries, humongous secondaries.

http://www.demoncarbs.com/1900.asp

You can get them for less, with no shipping fees, from Jegs.

 

[Wayne Parrish]

Beepster,There may be something wrong with the Q-Jet because they almost always give better mileage. I absolutely love my Q that Mtn Man rebuilt .Its getting 18 around town and 25-26.5 on the road ! WP

 

[rnhart3]

There are carbs other than Q-Jets?

 

[moose866]

Mountain Man Q jet solved all my problems.

 

[464elky]

Just for info: There are Carter q-jets around. Mostly the first few years of production. rochester couldn't keep up so the general used both.