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Demon carbs
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sourshop
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1964 Chevrolet Impala

PostPosted: Sun Feb 08, 2009 7:26 am    Post subject: Demon carbs Reply with quote

Can someone tell me if the early Demon carbs use Holley parts?
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Big Dave
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PostPosted: Sun Feb 08, 2009 9:48 am    Post subject: Reply with quote

I do not know but I suspect they do.

I must assume Holley never got either a trademark or a pattent on their 4150 line of carburetors as the Demon is a blatant "improvement". The only difference was in the manufacturing process (billet vs investment casting) that most end users would not readily notice from a casual inspection. So I suspect most parts are interchangeable. I have never owned a Demon carb (have boxes full of Holleys and Holley parts though) so I can not say for sure.

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Skunkworkx
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1968 Chevrolet Camaro

PostPosted: Sun Feb 08, 2009 10:17 am    Post subject: Reply with quote

Barry Grant use to work for Holley. He left and started his own carb line.
I'm pretty sure a lot of parts interchange (like jets,PV's,and such).

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Big Dave
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PostPosted: Mon Feb 09, 2009 1:41 pm    Post subject: Reply with quote

Actually Barry was a local racer who tuned carbs for other racers in the area. He worked for Florida Power and Light over in Pinelass County. He took what he learned about Holley's problems and fixed them (mostly having to do with porous castings causing the mix to go off; as gas leaked out, and air leaked in). He just machined the metering plates and other parts himself out of solid blocks of aluminum and went from there (I would assume at sometime after his production started to interfere with making parts for the power company).

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sourshop
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1964 Chevrolet Impala

PostPosted: Mon Feb 09, 2009 2:34 pm    Post subject: Reply with quote

Thanks,...great info.
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robins44
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PostPosted: Mon Feb 09, 2009 6:03 pm    Post subject: Reply with quote

someone should teach him how to clean metal shavings out of carbs before he ships them out. Very Happy
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lun40119
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1967 Chevrolet Chevelle

PostPosted: Mon Feb 09, 2009 6:58 pm    Post subject: Reply with quote

robins44 wrote:
someone should teach him how to clean metal shavings out of carbs before he ships them out. Very Happy


Thats what a good sharp consumer is for. Wait til you order your first aftermarket block.

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robins44
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PostPosted: Mon Feb 09, 2009 8:19 pm    Post subject: Reply with quote

i understand a block because they expect you to put parts in it, and clean all the oil galleys, etc, but if im buying a carb to throw on my engine i shouldnt have to tear it back down and clean it before i throw it on. If that was the case they should put a warning on the box that says tear me down im full of shavings.
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af2
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Location: grassvalley, ca
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1933 Willys Coupe

PostPosted: Mon Feb 09, 2009 8:30 pm    Post subject: Reply with quote

robins44 wrote:
i understand a block because they expect you to put parts in it, and clean all the oil galleys, etc, but if im buying a carb to throw on my engine i shouldnt have to tear it back down and clean it before i throw it on. If that was the case they should put a warning on the box that says tear me down im full of shavings.




Laughing Laughing Laughing Laughing
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lun40119
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1967 Chevrolet Chevelle

PostPosted: Mon Feb 09, 2009 8:53 pm    Post subject: Reply with quote

robins44 wrote:
i understand a block because they expect you to put parts in it, and clean all the oil galleys, etc, but if im buying a carb to throw on my engine i shouldnt have to tear it back down and clean it before i throw it on. If that was the case they should put a warning on the box that says tear me down im full of shavings.


Right, however you should be dissassembling it and at the very least verifying IFR's Main Jets, PVCR's and your emulsion jets. Or on the other hand you could open the box all glassy eyed and slap the puppy on with a big ole clown grin, and wonder why it idles pig rich, and smokes above 7000rpm and the Honda with the fart can just blew your doors clean off.

Ignorance is bliss.................Blame the manufacturer........

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robins44
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PostPosted: Mon Feb 09, 2009 8:59 pm    Post subject: Reply with quote

i always throw the carb on first to get a baseline on the plugs, and tune from there. I dont think im the only one who throws the carb on before tinkering with it, i dont think i should have to tear it down before i throw it on the first time.
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MufflerBearings69
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1968 Ford Galaxy

PostPosted: Tue Feb 10, 2009 7:57 pm    Post subject: Reply with quote

My first brand new Holley was missing the metering block gasket on the primary side...

Remember 99% quality control means every 100th part is screwed, and 99.9% means every 1000th part sucks... Happens!
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lun40119
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PostPosted: Tue Feb 10, 2009 8:37 pm    Post subject: Reply with quote

Right, that is also another good reason to disassemble and look over your parts, cause once you use it, most of the time its yours.
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robins44
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PostPosted: Wed Feb 11, 2009 11:02 am    Post subject: Reply with quote

MufflerBearings69 wrote:
My first brand new Holley was missing the metering block gasket on the primary side...

Remember 99% quality control means every 100th part is screwed, and 99.9% means every 1000th part sucks... Happens!


Does that same thing work for birth control? Razz
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MufflerBearings69
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1968 Ford Galaxy

PostPosted: Wed Feb 11, 2009 5:11 pm    Post subject: Reply with quote

Kinda.

But if your luck sucks like mine does, you'll get that 100th failed part every other time. Shocked
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