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#1
06-17-2013, 02:41 PM
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What are these two holes on my Qjet?
They are circled in red. Some time ago I think I noticed some fuel gurgle or splash at the hole on the right. I was under the hood just bliping the throttle wide open checking out the carb not long after I installed it. It didn't do this every time either, and it didn't really splash out, it was more like you could see it right at the hole briefly. I meant to investigate this sooner but never did and I am asking now. The carb otherwise seems to do what it's supposed to.
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 68 Firebird, trying a q-jet now. 434/10.5:1/997's/240-242 HFT/4L80E/2800 Yank/3.42's/ Vintage Air/ 13.0 @105 mph 70 Lemans, 350/350, A/C, mostly stock 14 Ram CC, 5.7 Hemi, 8-speed, 3.92 lsd 97 Trans Am, HPP Aug 2012 http://www.highperformancepontiac.co...tiac_trans_am/ ***Sold*** |
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#2
06-17-2013, 03:29 PM
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Vents above the the accl pump discharge. If something blocks the accl pump discharge holes in the second partition, fuel will shoot up thru the vent when you quickly depress the throttle....Cliff
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If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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#3
06-17-2013, 03:40 PM
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Ahh, I will check it out Cliff. I know I openened up the discharge holes per your spec, maybe I left a bur in there. Is it just the discharge blockage that will result in this or will something blocking further up the passages do this? Thanks.
__________________
68 Firebird, trying a q-jet now. 434/10.5:1/997's/240-242 HFT/4L80E/2800 Yank/3.42's/ Vintage Air/ 13.0 @105 mph 70 Lemans, 350/350, A/C, mostly stock 14 Ram CC, 5.7 Hemi, 8-speed, 3.92 lsd 97 Trans Am, HPP Aug 2012 http://www.highperformancepontiac.co...tiac_trans_am/ ***Sold*** |
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#4
06-18-2013, 08:25 AM
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The small holes are located on the inside partition, the larger holes on the near side. The vent is right above them, so any blockage into the engine has fuel spurting up and out of the vents.....Cliff
__________________
If you can read this, thank a teacher. If you can read this in English, thank a Veteran! https://cliffshighperformance.com/ 73 Ventura, SOLD 455, 3740lbs, 11.30's at 120mph, 1977 Pontiac Q-jet, HO intake, HEI, 10" converter, 3.42 gears, DOT's, 7.20's at 96mph and still WAY under the roll bar rule. Best ET to date 7.18 at 97MPH (1/8th mile), |
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