Q-jet Mpg - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chevyguy111786 · 01-02-2004, 04:42 PM

Would a q-jet improve my mpg. I have an edlebrock right now, with an almost stock 350.

dinnut · 01-02-2004, 04:44 PM

no, not unless the quadrajet is tuned really well! edelbrocks are tuned for optimum gas mileage supposedly

70short/step · 01-02-2004, 04:51 PM

The Q-jet gets great gas mileage if you keep your foot out of it!! Look at the size of those secondarys!! They are huge! Once they start to open you can watch the gas gauge go down.

Chevyguy111786 · 01-02-2004, 04:53 PM

dinnut edlebrocks are a pain in the @$$ to tune!! i'm gettin a holly if i don't use my q-jet.

86SILVERADO · 01-02-2004, 05:06 PM

Quote:

Originally posted by Chevyguy111786
dinnut edlebrocks are a pain in the @$$ to tune!! i'm gettin a holly if i don't use my q-jet.

LOL

I have heard the exact same thing about Holly carbs. I just bought an Edelbrock 1412 and a Holley 1160. I will let you know which one I like better.

Perchjerker · 01-02-2004, 05:18 PM

When I had a Qjet on my 84 LWB, I got 22 MPG on a stock 305 V-8.

Chevyguy111786 · 01-02-2004, 07:19 PM

I have a q-jet in my garage, i've heard that they do get better mpg, i was just trying to find out for sure before i do an overhaul on it

Perchjerker · 01-02-2004, 07:30 PM

You better be damn good at carb rebuilding to mess with a Qjet!

Chevelle454 · 01-02-2004, 07:45 PM

I have a Q-jet on a stock 305 in my '84 Caprice and it will get 24 mpg. If you step on it, you can kiss that goodbye.

69 air cab · 01-02-2004, 11:59 PM

86Silverado.........don't buy a Holly.......I bought an Edelbrock because several people said Holly was hard to keep adjusted. I got only 1 1/2 years out of the Edelbrock before it went to hell...........bought another and after 6 months I can't keep it tuned and my mileage went from 21 MPG to 16..........I'm going to replace with a quad. Autozone has them for $99

86SILVERADO · 01-03-2004, 12:28 AM

Now you tell me. I have approximately 4 q-jets laying around. I am just to lazy to soak the damn things long enough and get in there with a toothbrush and whatnot to try and get them running right. I have actually re-built a couple and I do like them and have gotten the 20 or so mpg with my old one on the 305 which I still have on there. I got the edelbrock and holley to experiment with on my 67 to see which does better. I also am keeping the 2-jet just in case. I was getting exactly ten mpg with that setup on the 307. Of course I just switched to a 350 so it won't be much of a comparison to the old setup but I want to see what is the best I can do with the 350 in there.

69 air cab · 01-03-2004, 08:52 AM

Nothing wrong with a good experiment. Good luck with it but I am finished forever with anything made by edelbrock. Street talk here is that they use to produce a good product but no longer.
By the way ......I did not mention that Autozone has a $40 core charge on the rebuilt quad. It was interesting that when I asked the guy at Autozone what they had in a rebuilt for my 69 he wanted to know if I would sell him my old quad..........he's a carb. guy on the side.
Good luck with it.

01-02-2004, 04:42 PM	#1
Chevyguy111786 Registered User Join Date: Apr 2003 Location: Garland, Texas Posts: 1,127	Q-jet Mpg Would a q-jet improve my mpg. I have an edlebrock right now, with an almost stock 350.

01-02-2004, 04:44 PM	#2
dinnut Registered User Join Date: Apr 2003 Location: missouri city, tx Posts: 4,486	if no, not unless the quadrajet is tuned really well! edelbrocks are tuned for optimum gas mileage supposedly __________________ 70 longbed 496/th400/Ford 9"

01-02-2004, 05:18 PM	#6
Perchjerker Beer Power!!!!!!!!!! Join Date: Nov 2003 Location: Nacogdoches, TX Posts: 280	When I had a Qjet on my 84 LWB, I got 22 MPG on a stock 305 V-8. __________________ Rather be fishin'

01-02-2004, 07:30 PM	#8
Perchjerker Beer Power!!!!!!!!!! Join Date: Nov 2003 Location: Nacogdoches, TX Posts: 280	You better be damn good at carb rebuilding to mess with a Qjet! __________________ Rather be fishin'

01-02-2004, 07:45 PM	#9
Chevelle454 Registered User Join Date: Aug 2003 Location: MN Posts: 380	I have a Q-jet on a stock 305 in my '84 Caprice and it will get 24 mpg. If you step on it, you can kiss that goodbye. __________________ 1972 C10 1972 C20

01-02-2004, 04:51 PM	#3
70short/step Registered User Join Date: Dec 2003 Location: Stockton, CA Posts: 1,579	The Q-jet gets great gas mileage if you keep your foot out of it!! Look at the size of those secondarys!! They are huge! Once they start to open you can watch the gas gauge go down.

01-02-2004, 04:53 PM	#4
Chevyguy111786 Registered User Join Date: Apr 2003 Location: Garland, Texas Posts: 1,127	dinnut edlebrocks are a pain in the @$$ to tune!! i'm gettin a holly if i don't use my q-jet.

01-02-2004, 07:19 PM	#7
Chevyguy111786 Registered User Join Date: Apr 2003 Location: Garland, Texas Posts: 1,127	I have a q-jet in my garage, i've heard that they do get better mpg, i was just trying to find out for sure before i do an overhaul on it

01-02-2004, 11:59 PM	#10
69 air cab Registered User Join Date: Oct 2003 Location: Maryville, TN Posts: 477	86Silverado.........don't buy a Holly.......I bought an Edelbrock because several people said Holly was hard to keep adjusted. I got only 1 1/2 years out of the Edelbrock before it went to hell...........bought another and after 6 months I can't keep it tuned and my mileage went from 21 MPG to 16..........I'm going to replace with a quad. Autozone has them for $99

01-03-2004, 12:28 AM	#11
86SILVERADO Registered User Join Date: Dec 2002 Location: Hills of Western Mass Posts: 626	Now you tell me. I have approximately 4 q-jets laying around. I am just to lazy to soak the damn things long enough and get in there with a toothbrush and whatnot to try and get them running right. I have actually re-built a couple and I do like them and have gotten the 20 or so mpg with my old one on the 305 which I still have on there. I got the edelbrock and holley to experiment with on my 67 to see which does better. I also am keeping the 2-jet just in case. I was getting exactly ten mpg with that setup on the 307. Of course I just switched to a 350 so it won't be much of a comparison to the old setup but I want to see what is the best I can do with the 350 in there. __________________ 86 Silverado C10 back to 305 power! 67 C30 Dually Dump, with 350 transplant, Rockhauler 05 Duramax 3500 "If at first you don't succeed, try a bigger hammer" Member of the 1-Ton club!

01-03-2004, 08:52 AM	#12
69 air cab Registered User Join Date: Oct 2003 Location: Maryville, TN Posts: 477	Nothing wrong with a good experiment. Good luck with it but I am finished forever with anything made by edelbrock. Street talk here is that they use to produce a good product but no longer. By the way ......I did not mention that Autozone has a $40 core charge on the rebuilt quad. It was interesting that when I asked the guy at Autozone what they had in a rebuilt for my 69 he wanted to know if I would sell him my old quad..........he's a carb. guy on the side. Good luck with it.



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