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#1
05-18-2016, 07:01 PM
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How do you guys measure the tubes, idle bleeds and orifices of a Q-jet?
I have 3 quadrajets that I would like to extensively build, but I need to know the I.D.s of all of the various tubes, air bleeds, idle and orifices with in the carbs to get the proper parts/combination. What tools do yall use to measure these
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1970 GTO: Atoll Blue, TH400, 400 +.060, small chamber Ferrea big valve fitted # 15 heads, Summit 2802 cam, Iron intake, Cliff Ruffles 850 cfm qjet, Hooker headers, 2.5 mandrel bent exhaust, Race Pro mufflers, 3.73 Safe-T-Track. |
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#2
05-18-2016, 07:04 PM
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I use pin drills.
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#3
05-18-2016, 07:41 PM
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Yup, pin drills.
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#4
05-18-2016, 08:23 PM
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Yup, and a mic.
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Robert 69 Firebird-462/Edel round ports/currently running the Holley Sniper/4sp/3.23posi/Deluxe Int/pwr st/vintage air/4wl disc( a work in progress-always ) http://youtu.be/eaWBd3M9MN4 |
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#5
05-18-2016, 09:41 PM
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same here, pin gauges.
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#6
05-18-2016, 10:09 PM
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I used a cheap drill bit set from Harbor Freight and a dial caliper
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1970 GTO-vert, 461, eheads, stump puller, m20, 3.42 
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#7
05-19-2016, 12:43 AM
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I said pin drills. I use the drills to modify the holes, but I use pin gauges (as mentioned above) to measure them.
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#8
05-19-2016, 10:31 AM
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All of the above
And...a few of the folding pak torch tip cleaners. The files are in drill size and the starter tip is slightly smaller. Really handy to clean and ream down tubes, without pulling, if they don't need opened up a bunch.
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All the federales say,they could've had him any day They only let him slip away, out of kindness...I suppose Poncho & Lefty |
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#9
05-19-2016, 06:55 PM
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Well, I had better get me a set. Thank you guys!
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1970 GTO: Atoll Blue, TH400, 400 +.060, small chamber Ferrea big valve fitted # 15 heads, Summit 2802 cam, Iron intake, Cliff Ruffles 850 cfm qjet, Hooker headers, 2.5 mandrel bent exhaust, Race Pro mufflers, 3.73 Safe-T-Track. |
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#10
05-19-2016, 11:36 PM
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Do you have Cliff's book?
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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#11
05-20-2016, 08:17 AM
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Quote:
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 frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
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#12
05-20-2016, 10:36 AM
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Snap on Tool makes a good set of carburetor numbered drills. I am not a Snap on Tool dealer! If you want accurate numbered drills expect to pay. I have the Harbor Freight set and drill measurements are off by up to .007" depending on the diameters measured with a caliper. Do as your budget dictates.
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