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21
Lobby / Re: Edelbrock 1910 carb help needed
« Last post by Cliff Ruggles on March 31, 2026, 01:33:29 AM »
The 1910 is a factory high performance carburetor.  It still needs help in a few areas.  The accl pump in them is crap and so are the ones in the kits they sell for them.  I sell custom rebuild kits for those with a much better accl pump, .149" HP N/S assembly and everything required to get the carb up to par.  It may need a slight recalibration based on the engine specs but I don't know all the details.  IF you want the best kit currently available for that carb contact me at the shop, 740-397-2921.....tks...Cliff
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Quadrajet Carb Talk and Tips / Re: Bigger holes in Main body and Air Horn than First Recipe recommendation.
« Last post by lightning boy on March 30, 2026, 05:08:30 AM »
Don't over think it. Just see what the factory specified for that engine and try to cross reference one if you have to. It's a controlled vacuum leak, and it's part of the equation, a pcv from a 305 isn't right for a 454 big block in a Corvette. Someone did a deep dive on these once and measured the orifice on each of the part numbered valves for GM that year. Wew!
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Quadrajet Carb Talk and Tips / Re: Bigger holes in Main body and Air Horn than First Recipe recommendation.
« Last post by Albert on March 29, 2026, 12:50:07 PM »
JOB DONE !

...up to this point at least - thanks very much for your advice and guidance Kenth and Lightning boy.

When I read both of your descriptions of the correct location to drill for more by-pass air, I banged my head on a brick wall for a minute  :-[ Of course I read about them a number of times in Cliffs book!
I did need your help to locate the accelerator pump jets. I did what my wife would describe as a "boys look", not a proper look!
All holes have now been sized according to your advice, adjustments made according to advice noted in Cliff's book, so, the carby rebuild is done!  ;D 8)

The one question remaining in my mind from your comment Lightning Boy, is regards is how the PCV valve is going to effect the running of the engine. It is a very simple straight body valved tube type, connected to the top of the intake with a tube going to the carby. But I am not too concerned about that as I am sure all will be revealed when I do get to start the engine!

I am currently removing the OEM 2 barrel cast intake manifold to pop on an Edelbrock 2131 intake, so I can use the Qjet.
I will post a couple of final images to round this subject off, and once I have the carburetor fitted to the engine, I will be ready to start the engine and start dialing the Qjet in, as far as I can for now.

See you in the "Dialing It In" section of this Forum!
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Quadrajet Carb Talk and Tips / Re: HEI Distributor mechanical advance curve options
« Last post by Burd on March 26, 2026, 05:13:44 PM »
I know a bud here selling 1 or 2.
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Quadrajet Carb Talk and Tips / Re: HEI Distributor mechanical advance curve options
« Last post by Cadman-iac on March 25, 2026, 06:46:24 PM »
 It's going to be a little while before I can post the results,  I've been admitted to the hospital for a bad infection. I haven't been feeling well for close to a month now, and it finally got the best of me this morning.

  One thing that I've can say about the results is that the actual engine tests are not living up to what I've been seeing on the bench tests.
 So I think I'm going to have to set up that tester that 70GS455 posted. My drill will spin it up to 2500 rpm, which is perfect.  I got a couple of different sized protractors to use for it.
 I still need to figure out how to get a timing light to work on the distributor without the cap and coil in place. I think I can use an externally mounted coil, but I don't know how to wire it in yet.
 Does anyone know how to do this and be willing to show me? I'd really appreciate the help. My thanks in advance for whatever assistance you can provide.

 Rick
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Lobby / Edelbrock 1910 carb help needed
« Last post by Bgdaddy455 on March 25, 2026, 04:54:19 AM »
Hello all, I'm about to rebuild a Edelbrock 1910 carb which I have never done before but I have rebuilt a couple Holley carbs with no issues so I'm just a little green lol. I have an olds big block pushing just north of 500 HP with a Holley 770 CFM square bore to spread bore intake and I was told I'm losing power with that setup. I do have the adapter plate but apparently it doesn't solve the HP loss. I do have a 1910 850 CFM carb and from what I'm being told it will work much better than the Holley as it will match the spread bore intake and is 850 CFM. Is there someone who could give me the specs on what the carb should have to support 550 HP?
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Diagnose a Quadrajet carburetor problem / Re: will a pcv valve cause a lean condition?
« Last post by von on March 24, 2026, 03:50:20 AM »
A connection to the air cleaner is for clean air to the engine that the PCV valve is allowing "oil fumed air" to be sucked out.
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Diagnose a Quadrajet carburetor problem / Re: will a pcv valve cause a lean condition?
« Last post by bruno on March 23, 2026, 06:53:13 PM »
well it seems like an adjustment to the APT cured the bog. the tip in caused a 50 rpm increase now.
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Diagnose a Quadrajet carburetor problem / Re: will a pcv valve cause a lean condition?
« Last post by bruno on March 23, 2026, 02:42:57 PM »
sorry i forgot, Idle bypass air is 095.
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Diagnose a Quadrajet carburetor problem / will a pcv valve cause a lean condition?
« Last post by bruno on March 23, 2026, 02:42:06 PM »
long story short, I’m having trouble with what i think is a lean bog right off idle. 68 chevelle 396, mild cam. idle vac. is 18, steady. timing is 10 initial, another 10 from manifold VA, centrifugal starts at 950ish, adding another 26 at 3600ish. it idles well, both mixture screws have response, they’re set at 3 turns out. accelerator pump has a good shot in both primaries. idle tubes are .037, DCR is 052, LIAB is 063, UIAB is 070. holes under i’ll screws are 085. I think i should have lots of idle fuel. when i pull th pcv valve and block it off, the rpms drop about 50, and the bog nearly disappears. should the pcv be flowing a ton of air at idle? it is connected to manifold vacuum at the front of the base plate. I did replace this pcv a while ago from napa, so it SHOULD be the correct one. I also have an air cleaner base that has a spot for a pvc hose, would that be a better option?
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