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ACCEL. PUMP DISCHARGE NOZZLES 0.022"
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Thanks Cliff, the rebuild kit arrived today
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Quadrajet Carb Talk and Tips / Re: Check This Out
« Last post by qjetsrule on July 11, 2024, 07:25:09 AM »
The corrosion on the accelerator pump spring is also a bad sign. I wonder how much junk went through the motor.
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Dialing in your rebuilt Quadrajet carburetor / 7045281 RICH IDLE / LEAN WOT
« Last post by Mikecaterina on July 10, 2024, 05:33:35 PM »
Im having 2 issues with my QJET (REBUILT AS BELOW)
1st problem is I can't lean idle out enough, stinks of fuel, people complain cover their noses etc. Black sooty tail pipes and spark plugs at idle, NOT wet at all, no nozzle drip.
Not running on transition slot, showing under 0.010" exposed. 

2nd problem seems to lean out at WOT. (haven't ruled out mechanical fuel pump though)

Just thought Id run the specs past you guys and see if there's anything that might raise a red flag


CAR - weight is 2850lbs, 4 speed manual and 3.9:1 read ends with 24.5” tyres.
ENGINE - HOLDEN 308ci (3.062” stroke) 4.030" BORE
Forged flat tops 10:1 comp
1.94/1.60 ported heads
Dual plane manifold (Edelbrock performer)
Crowed 236/246 112 solid camshaft (0.520"/0.530")
1.65 roller rockers
Timing 18-36

Rebuilt carb new bushings in throttle shafts, cliff parts throughout.

QJET 7045281 DATE 0165 side entry fuel inlet (3/8" fuel line)
FLOAT 1/4"
N/S 0.135"
JET 77
RODS 44B (WERE 50B)
SECONDARY RODS AX
HANGER F
Idle tubes 0.035" (were 0.029")
DCR 0.0575 (were 0.040)
UPPER IDLE AIR BLEED 0.070"
LOWER IDLE AIR BLEED 0.061"
UPPER MAIN AIR BLEEDS 0.120"/0.120"
IDLE BYPASS 0.109"
IDLE MIXTURE HOLES 0.089"
SECONDARY EMULSION TUBES LOWER RESTRICTOR HOLE 0.026"
BIG FEED TUBES NEXT TO THOSE 0.077"
SECONDARY WELL RESTRICTOR 0.038"
AIR FLAP DISTANCE 1.429" (???????)



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Lobby / Re: New toy
« Last post by Mudsport96 on July 08, 2024, 06:02:24 PM »
I wouldn't mind a pontoon boat, but never look a gift horse in the mouth. And it can still be used to pull a tube or skier easily. I also found out that outboards were "re-rated" in the 80s. Originally I guess that all were power head rated and in 85ish they went to propeller hp ratings ( I was 3 at the time so what do I know). But apparently the 115 on this is prop rating, and the year before it was marketed as a 140 because of the rating being at the crank. That explains the get up and go I guess. Either way it is a new thing to play with since I have the carb on the car dialed in and nothing to tinker with at the moment.
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Diagnose a Quadrajet carburetor problem / Re: 17084223 idle bypass air
« Last post by 65malibu on July 08, 2024, 07:53:31 AM »
So, readjust the mixture screws and idle with the small vacuum hose off? Wouldn't it be rich when I put the hose back on?
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Lobby / Re: Looking for some advice on a stock sbc 350 build
« Last post by Cliff Ruggles on July 08, 2024, 01:26:37 AM »
Here is a pic of my favorite timing sets, with steel sprockets and heat treated gears.  Very rare these days but the very best timing sets ever made for these engines.....IMHO...
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Lobby / Re: New toy
« Last post by Cliff Ruggles on July 08, 2024, 01:22:31 AM »
Cool, looks like fun!

I have a fuel and oil injected Evinrude on my pontoon boat.  It's a mid-2000 model.  60hp and no issues to date other than I had to replace a seal on the oil tank last summer.....
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Diagnose a Quadrajet carburetor problem / Re: 17084223 idle bypass air
« Last post by Cliff Ruggles on July 08, 2024, 01:19:27 AM »
Pulling off a small vacuum hose should increase engine speed.  Lower the idle speed back down and re-adjust the idle mixture screws, if needed, and see if it improves sensitivity with them and no nozzle drip.  In most cases no need to add more bypass air if you don't have nozzle drip and full control with the mixture screws, but every application is slightly different and there are times when adding a little bit more helps.....
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Diagnose a Quadrajet carburetor problem / Re: 17084223 idle bypass air
« Last post by quadrajam on July 07, 2024, 06:49:20 AM »
^X2
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