Still runnin' a Q-Jet? Seen the Oct. CT mag? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ChevLoRay · 08-20-2009, 09:31 PM

Pages 31-40 of the October Classic Trucks magazine has a nice in-depth article about the Q-Jet, by Moses Ludel. Nice pics and great info. I was impressed. I know there are a lot of other pubs with more data, but for the uninformed, this is a good introduction.

Jim_PA · 08-20-2009, 09:40 PM

You can't go wrong with a Q-jet

KEL · 08-21-2009, 07:12 AM

couldn't find the article on line
got a link ?

prostreetC-10 · 08-21-2009, 07:59 AM

Quote:

Originally Posted by Jim_PA

You can't go wrong with a Q-jet

BarryB · 08-21-2009, 08:02 AM

I actually like a Q-jet, when there built correctly. Plus they can be tuned to get good MPG. I don't get CT anymore, So if somebody finds a link to it online. please post it?

Jim_PA · 08-21-2009, 08:33 AM

Quote:

Originally Posted by prostreetC-10

**Stocker** · 08-21-2009, 08:44 AM

I really have no complaints about my Q-jet. It was rebuilt many years ago and all is still good. I have been told they are better at severe angles (off road) than many other carbs.....

**WorkinLonghorn** · 08-21-2009, 09:19 AM

Here's another article from Classic Truck by Moses Ludel about tuning a Q-jet (and others);

http://www.classictrucks.com/tech/09...ics/index.html

69GMCLonghorn · 08-21-2009, 09:29 AM

On the primaries, I always found my Holly outperformed the Q-jet, but there's more of a kick when you open up the secondaries on a Q-jet than my Holly.

Bears63 · 08-21-2009, 09:29 AM

I do love the Q-jet. When built and tuned properly you just can't beat them in my book.

Jim_PA · 08-21-2009, 09:44 AM

Quote:

Originally Posted by 69GMCLonghorn

On the primaries, I always found my Holly outperformed the Q-jet, but there's more of a kick when you open up the secondaries on a Q-jet than my Holly.

Set-up and tuned properly, you shouldn't feel a difference between the primaries and secondaries. It was probably running lean on the primary side.

ChevLoRay · 08-21-2009, 10:31 AM

That link is the right article. Pix are larger in the mag, but this is good.

One thing I found after I installed my Edelbrock 1901 Q-Jet was that it ran much leaner than the Edelbrock 1405 that was on my truck when I bought it. In fact, I had to add a heat shield to the starter solenoid, and I also saw my gas-fouled plug problem go away. Starts are "NOW" and no flooding issues.

69GMCLonghorn · 08-21-2009, 10:50 AM

I'll still take a good old HOLLY over a Q-jet any day! (I know, I know... there goes that can o' worms again!)

Jim_PA · 08-21-2009, 11:23 AM

Quote:

Originally Posted by 69GMCLonghorn

I'll still take a good old HOLLY over a Q-jet any day! (I know, I know... there goes that can o' worms again!)

It's OK -- all you are missing out on is driveability, performance, and economy

69GMCLonghorn · 08-21-2009, 12:29 PM

Quote:

Originally Posted by Jim_PA

It's OK -- all you are missing out on is driveability, performance, and economy

Ok, now ya done it! After I tuned my Holly, it ran so well, the choke was removed completely (and no it wasn't running fat), gas mileage improved, power is great... I just have to keep a fire extinguisher handy for WHEN it starts to leak!! HAHAHAHA!!!!

Jim_PA · 08-21-2009, 12:54 PM

Quote:

Originally Posted by 69GMCLonghorn

Ok, now ya done it! After I tuned my Holly, it ran so well, the choke was removed completely (and no it wasn't running fat), gas mileage improved, power is great... I just have to keep a fire extinguisher handy for WHEN it starts to leak!! HAHAHAHA!!!!

I don't have a choke either! It saves me at least 3 ounces of weight.

mclairmo · 08-21-2009, 01:25 PM

You don't need a choke, right? It just impedes airflow.

**WorkinLonghorn** · 08-21-2009, 01:32 PM

I don't need one because,well,I live in Southern California. Haven't had a choke since hmmmmm, a LONG time ago!

**WorkinLonghorn** · 08-21-2009, 01:35 PM

But I do like my Q-jet. Runs good and lean on primaries,good and stong on secondaries,no problems ever (10years since I went through it).

Jim_PA · 08-21-2009, 02:02 PM

Quote:

Originally Posted by mclairmo

You don't need a choke, right? It just impedes airflow.

If you modify it, most likely not, but from the factory, the idle circuits are pretty lean, so a choke is almost mandatory.

I left the high idle system in place for cold winter days, just removed the choke flap itself.

prostreetC-10 · 08-21-2009, 02:32 PM

Quote:

Originally Posted by 69GMCLonghorn

Ok, now ya done it! After I tuned my Holly, it ran so well, the choke was removed completely (and no it wasn't running fat), gas mileage improved, power is great... I just have to keep a fire extinguisher handy for WHEN it starts to leak!! HAHAHAHA!!!!

Oaky 69GMCLonghorn......you and I need to team up to fight the forces of evil when it comes to the Q-jet villians and their leader PA Jim! I have a small Holley business/hobby I run out of my garage and have gotten to know them quite well. I've been doing a lot of the 750 HP's and they've been working out great. Here is a completed one. Granted, it's not nearly as pretty as a Q-jet, which is why I should be running 2 of them instead of my Holleys (LOL), but what are you gunna do.

69GMCLonghorn · 08-21-2009, 04:42 PM

Ok, I really wasn't looking to open the flood gates on the debate again... BUT IT IS FUN!!! HAHAHA

I'm a big fan of Holley's, I've been running them for over 20 years on my old vehicles, but I can't say much bad about the Q's... Think about it: Someone was good enough to have created a carburetor that was approved FOR YEARS for use on BIG BLOCKS with the California Air Resources Board!! Talk about an accomplishment!

BIG69GMC · 08-21-2009, 05:08 PM

talking about Q-jet, where can i find one? I've started looking and cant find one for my '69 , looked into summit, still couldnt find one. i found one for my '73 monte w/350cid, not sure if they would be interchangeable? like if i bought one for my monte and ran it on the truck?

Sinister · 08-21-2009, 05:11 PM

Quote:

Originally Posted by BIG69GMC

talking about Q-jet, where can i find one? I've started looking and cant find one for my '69 , looked into summit, still couldnt find one. i found one for my '73 monte w/350cid, not sure if they would be interchangeable? like if i bought one for my monte and ran it on the truck?

Summit has rebuilt Quadrajets for $300.

prostreetC-10 · 08-21-2009, 05:11 PM

they are usually found in dumpsters and the like.

08-20-2009, 09:31 PM	#1
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Still runnin' a Q-Jet? Seen the Oct. CT mag? Pages 31-40 of the October Classic Trucks magazine has a nice in-depth article about the Q-Jet, by Moses Ludel. Nice pics and great info. I was impressed. I know there are a lot of other pubs with more data, but for the uninformed, this is a good introduction. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

08-20-2009, 09:40 PM	#2
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? You can't go wrong with a Q-jet

08-21-2009, 07:12 AM	#3
KEL 72 GMC Join Date: Feb 2008 Location: Wells, Maine Posts: 534	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? couldn't find the article on line got a link ?

08-21-2009, 08:02 AM	#5
BarryB Senior Member Join Date: Jul 2006 Location: Blountville, Tn. Posts: 3,904	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? I actually like a Q-jet, when there built correctly. Plus they can be tuned to get good MPG. I don't get CT anymore, So if somebody finds a link to it online. please post it? __________________ We could learn a lot from crayons... Some are sharp; some are pretty;and some are dull. Some have weird names; and all are different colours;but they all have to live in the same box. You may be only one person in the world, But you may also be the world to one person. * Some mistakes are too much fun to only make once. Two rules in life. 1. Never sweat the small stuff! 2. Everything is small stuff!

08-21-2009, 08:44 AM	#7
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,728	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? I really have no complaints about my Q-jet. It was rebuilt many years ago and all is still good. I have been told they are better at severe angles (off road) than many other carbs..... __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 08-21-2009 at 08:44 AM.

08-21-2009, 09:19 AM	#8
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? Here's another article from Classic Truck by Moses Ludel about tuning a Q-jet (and others); http://www.classictrucks.com/tech/09...ics/index.html __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

08-21-2009, 09:29 AM	#9
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? On the primaries, I always found my Holly outperformed the Q-jet, but there's more of a kick when you open up the secondaries on a Q-jet than my Holly.

08-21-2009, 09:29 AM	#10
Bears63 ...just another truck junkie.. Join Date: May 2009 Location: Watertown, SD Posts: 698	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? I do love the Q-jet. When built and tuned properly you just can't beat them in my book. __________________ Mike "Bear" Shea

08-21-2009, 10:31 AM	#12
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? That link is the right article. Pix are larger in the mag, but this is good. One thing I found after I installed my Edelbrock 1901 Q-Jet was that it ran much leaner than the Edelbrock 1405 that was on my truck when I bought it. In fact, I had to add a heat shield to the starter solenoid, and I also saw my gas-fouled plug problem go away. Starts are "NOW" and no flooding issues. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

08-21-2009, 10:50 AM	#13
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? I'll still take a good old HOLLY over a Q-jet any day! (I know, I know... there goes that can o' worms again!)

08-21-2009, 01:25 PM	#17
mclairmo Registered User Join Date: Jan 2006 Location: Take Off Posts: 1,908	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? You don't need a choke, right? It just impedes airflow.

08-21-2009, 01:32 PM	#18
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? I don't need one because,well,I live in Southern California. Haven't had a choke since hmmmmm, a LONG time ago! __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

08-21-2009, 01:35 PM	#19
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,886	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? But I do like my Q-jet. Runs good and lean on primaries,good and stong on secondaries,no problems ever (10years since I went through it). __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

08-21-2009, 04:42 PM	#22
69GMCLonghorn Registered User Join Date: Dec 2006 Location: Porter Ranch, CA Posts: 978	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? Ok, I really wasn't looking to open the flood gates on the debate again... BUT IT IS FUN!!! HAHAHA I'm a big fan of Holley's, I've been running them for over 20 years on my old vehicles, but I can't say much bad about the Q's... Think about it: Someone was good enough to have created a carburetor that was approved FOR YEARS for use on BIG BLOCKS with the California Air Resources Board!! Talk about an accomplishment!

08-21-2009, 05:08 PM	#23
BIG69GMC Registered User Join Date: Jul 2009 Location: Albuquerque, NM Posts: 101	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? talking about Q-jet, where can i find one? I've started looking and cant find one for my '69 , looked into summit, still couldnt find one. i found one for my '73 monte w/350cid, not sure if they would be interchangeable? like if i bought one for my monte and ran it on the truck?



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08-21-2009, 05:11 PM	#25
prostreetC-10 My Carbon Footprint Join Date: Oct 2008 Location: Orygun Posts: 5,527	Re: Still runnin' a Q-Jet? Seen the Oct. CT mag? they are usually found in dumpsters and the like. __________________ A quick "pedalfest" *Still getting loose (carb test)* 496 Initial fire up video!

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