Q Jet Secoundary Rods

SDT1DYI · 05-31-2017, 11:34 AM

Having trouble getting the secoundary's jetted properly. Have several questions regarding rod sizing and tip lengths

Smaller the final tip size, does it always mean the richer the mixture? Do the tip lengths S, M, SM and L effect rich or lean condition with the same tip final size?
Why are LL tips never to be used in greater than 70% air valve opening?
Wanting to start on the rich side, is there good rod and hanger letter numbers to start with for a SBC 350 stocker for sea level conditions?

Tension on the Air valve. What effect does the tension have in 60ft times? Is it better to be on the loose side or on the tighter side using a 2 step WOT?.

Thanks to everyone for the help

.

Hacksaw · 05-31-2017, 01:50 PM

The tip of the secondary rod sits in a fixed size orifice and acts as a restriction. So yes, the smaller the tip the richer the mixture. "They" say the long rods work better in drag racing but I have never seen any difference in testing. Don't know what LL tips are. Most guys measure tip diameter size for tuning, I go by factory stamps. An AU or CK rod is fairly rich. You really need a tool to properly measure the hangers. You can not go by the stamping. B or C hanger is on the very rich scale of things. The tension on the flap should not be to loose or a bog will surely appear. Don't think you will find much in the 60 with the flap once you have it set.

Mike Pearson · 05-31-2017, 01:59 PM

A good starting rod size is a .057 rod. Hot weather a .066 rod is what I use. J or K hanger is also a good starting spot. Beachy Machine makes the tool to check the hangers as I remember. Not sure if they still make them.

nhramnl · 06-01-2017, 07:20 AM

Mike Pearson is 100 percent on the money with his response. I bought a Beachy tool a few years back and Mike (Beachy) told me that at that time, they still had a few and would happily sell them.

richie 2 · 06-05-2017, 01:31 PM

how do we get ahold of beachy tool?

Mike Semeniuk · 06-06-2017, 02:34 PM

LSM had a hanger checker - I'll post a picture later. Not sure if they still make it.

Lew Silverman · 06-06-2017, 04:51 PM

I spoke to the folks at Beachy's in Kokomo, and the gentleman who created that tool has retired. I left a message at the number I was given for him, and I'm just waiting on a call-back. I'll update y'all when I have more information. How many folks would be interested in such a tool if it was made available?

Lew

Hacksaw · 06-06-2017, 07:03 PM

I use a LSM tool. Saw it listed on their website. QJ-100 hanger alignment tool $39.00

Dissident · 06-06-2017, 10:24 PM

Forum Folks that might be interested in an easy solution to measuring QJet Hangers:
Easy to build out of scrap stuff. Center piece is 1/8" aluminum but could be steel or whatever. Bottom is built from couple of pieces of 3/4" x 1/8" angle iron so it is easy to keep upright when used. Will include a few photos for reference. Most folks do not need this kind of accuracy but it is easy to use anyway. Soon as I figure how to resize the pics that is.
Measure from the top surface to the pin (0.067" diam) with dial caliper.

Regards to All,
Dissident

SDT1DYI · 06-06-2017, 10:26 PM

I made up a fixture to measure the hanger dimensions. Pretty easy to do. I had several Q jets so I sectioned one so I could see exactly how the secondary rod changes with hanger letter changes. K, G etc.
What I experienced on the Dyno, using LL .040 tips rods , thinking I was riching the secondaries, it went lean. Dont understand why??? I found the primary side jet size numbers can be way off, BEST to flow every jet you have to know for sure which way you are really going with your jet changes.

Thanks to all that responded.

05-31-2017, 11:34 AM	#1
SDT1DYI Member Join Date: Nov 2016 Location: Indianola Washington Posts: 399 Likes: 0 Liked 453 Times in 146 Posts	Q Jet Secoundary Rods Having trouble getting the secoundary's jetted properly. Have several questions regarding rod sizing and tip lengths Smaller the final tip size, does it always mean the richer the mixture? Do the tip lengths S, M, SM and L effect rich or lean condition with the same tip final size? Why are LL tips never to be used in greater than 70% air valve opening? Wanting to start on the rich side, is there good rod and hanger letter numbers to start with for a SBC 350 stocker for sea level conditions? Tension on the Air valve. What effect does the tension have in 60ft times? Is it better to be on the loose side or on the tighter side using a 2 step WOT?. Thanks to everyone for the help .

05-31-2017, 01:50 PM	#2
Hacksaw Senior Member Join Date: Sep 2016 Posts: 880 Likes: 202 Liked 306 Times in 172 Posts	Re: Q Jet Secoundary Rods The tip of the secondary rod sits in a fixed size orifice and acts as a restriction. So yes, the smaller the tip the richer the mixture. "They" say the long rods work better in drag racing but I have never seen any difference in testing. Don't know what LL tips are. Most guys measure tip diameter size for tuning, I go by factory stamps. An AU or CK rod is fairly rich. You really need a tool to properly measure the hangers. You can not go by the stamping. B or C hanger is on the very rich scale of things. The tension on the flap should not be to loose or a bog will surely appear. Don't think you will find much in the 60 with the flap once you have it set.

05-31-2017, 01:59 PM	#3
Mike Pearson VIP Member Join Date: Mar 2007 Posts: 2,437 Likes: 611 Liked 1,904 Times in 571 Posts	Re: Q Jet Secoundary Rods A good starting rod size is a .057 rod. Hot weather a .066 rod is what I use. J or K hanger is also a good starting spot. Beachy Machine makes the tool to check the hangers as I remember. Not sure if they still make them. __________________ Mike Pearson 2485 SS

06-01-2017, 07:20 AM	#4
nhramnl Senior Member Join Date: Feb 2010 Posts: 507 Likes: 8 Liked 358 Times in 83 Posts	Re: Q Jet Secoundary Rods Mike Pearson is 100 percent on the money with his response. I bought a Beachy tool a few years back and Mike (Beachy) told me that at that time, they still had a few and would happily sell them.

06-05-2017, 01:31 PM	#5
richie 2 Senior Member Join Date: Feb 2009 Posts: 967 Likes: 418 Liked 200 Times in 91 Posts	Re: Q Jet Secoundary Rods how do we get ahold of beachy tool?

06-06-2017, 02:34 PM	#6
Mike Semeniuk Junior Member Join Date: Aug 2004 Location: Sherwood Park, Alberta Posts: 99 Likes: 19 Liked 6 Times in 2 Posts	Re: Q Jet Secoundary Rods LSM had a hanger checker - I'll post a picture later. Not sure if they still make it. __________________ Mike Semeniuk 632 GTMA

06-06-2017, 04:51 PM	#7
Lew Silverman VIP Member Join Date: Mar 2010 Location: Newport News, VA Posts: 1,435 Likes: 371 Liked 129 Times in 59 Posts	Re: Q Jet Secoundary Rods I spoke to the folks at Beachy's in Kokomo, and the gentleman who created that tool has retired. I left a message at the number I was given for him, and I'm just waiting on a call-back. I'll update y'all when I have more information. How many folks would be interested in such a tool if it was made available? Lew Attached Thumbnails __________________ Lew Silverman #2070 "The Wagon Master" N/SA

06-06-2017, 07:03 PM	#8
Hacksaw Senior Member Join Date: Sep 2016 Posts: 880 Likes: 202 Liked 306 Times in 172 Posts	Re: Q Jet Secoundary Rods I use a LSM tool. Saw it listed on their website. QJ-100 hanger alignment tool $39.00

06-06-2017, 10:24 PM	#9
Dissident Member Join Date: Jan 2016 Location: Colorado hills Posts: 123 Likes: 11 Liked 73 Times in 36 Posts	Re: Q Jet Secoundary Rods Forum Folks that might be interested in an easy solution to measuring QJet Hangers: Easy to build out of scrap stuff. Center piece is 1/8" aluminum but could be steel or whatever. Bottom is built from couple of pieces of 3/4" x 1/8" angle iron so it is easy to keep upright when used. Will include a few photos for reference. Most folks do not need this kind of accuracy but it is easy to use anyway. Soon as I figure how to resize the pics that is. Measure from the top surface to the pin (0.067" diam) with dial caliper. Regards to All, Dissident Attached Thumbnails Last edited by Dissident; 06-06-2017 at 10:33 PM.

06-06-2017, 10:26 PM	#10
SDT1DYI Member Join Date: Nov 2016 Location: Indianola Washington Posts: 399 Likes: 0 Liked 453 Times in 146 Posts	Re: Q Jet Secoundary Rods I made up a fixture to measure the hanger dimensions. Pretty easy to do. I had several Q jets so I sectioned one so I could see exactly how the secondary rod changes with hanger letter changes. K, G etc. What I experienced on the Dyno, using LL .040 tips rods , thinking I was riching the secondaries, it went lean. Dont understand why??? I found the primary side jet size numbers can be way off, BEST to flow every jet you have to know for sure which way you are really going with your jet changes. Thanks to all that responded.