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[C2] What Holley carb is this on my '67?

 
Old 02-01-2019, 08:31 PM
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Mr Fufu
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Default What Holley carb is this on my '67?

Here's a photo of the Holley 4160 on my '67 coupe:


The numbers on the air horn are as follows:
LIST - 1850 - 3
0320


I ask because the carb works fine, I had it rebuilt a couple of years ago. But, the fuel line is not correct. Instead of a steel line all the way to the carb, the PO used a piece of rubber hose to go the 'last mile' to the carb. I fixed a leak that sprung from one of the rubber hose clamps once already, and we all know how disastrous a fuel leak on a hot manifold can be!

So, I ordered a repro steel fuel line from Ecklers and set about replacing the line. Alas, I discovered that the carb has no corresponding female fitting to screw the male fitting on the fuel line!

This tells me the Holley on my car is not the original carb. It looks to be a service replacement. A friend tells me it is a Holley intended for a FORD, because the fuel line intake fitting is different than what GM used.

So, can you tell me what application the carb on my car was intended for? Is it intended for a Ford?

If I don't want to replace the carb, can I get the required fitting to connect the proper steel fuel line to it? Where would I find such a thing?

Thanks in advance,
-Alex
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Old 02-01-2019, 08:51 PM
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its just a generic over the counter hot rod Holley
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Old 02-01-2019, 09:43 PM
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ricks327
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I had a replacement dated carb on my 67 L79 car (which a Corvette Hall of Fame inductee missed) and found the correct carb with correct date code and had it restored. Here are the photos:






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Old 02-01-2019, 10:23 PM
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That is the cheapest, most generic 600 cfm carb Holley makes. Single feed, side hung bowls, fuel transfer tubes, secondary metering plate. Not a performance carb by any means.

That said, they work fine for cruising and should give you years of trouble free operation.

Last edited by Factoid; 02-01-2019 at 10:24 PM.
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Old 02-01-2019, 11:47 PM
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Avispa
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It seems that Holley doesn't sell a hard line inlet fitting for your primary fuel bowl. You can get a replacement swivel fitting and try cutting the hose barb off to install a compression union or similar coupling to plumb a hard line or find a replacement original style primary fuel bowl. If it runs well, you'd be better off getting some SAE J-30 specification fuel hose and smooth (not worm screw type) band hose clamps to replumb that section of hose.
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Old 02-02-2019, 08:43 AM
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DansYellow66
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I think you could use the Marine bowl Holley sells with the correct fitting. They sell a couple of fitting so you would need to verify fuel line fitting size to get the right one.

https://www.holley.com/products/fuel...rts/34R10918AQ

https://www.holley.com/products/fuel...parts/26-27The

The basic carb is fine for your engine. If may not be the high performance Holley line but it's still a very good carb and basically equivalent to what came with the engine originally.

Last edited by DansYellow66; 02-02-2019 at 08:46 AM.
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Old 02-02-2019, 08:45 AM
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Also I don’t think that carb has a internal fuel filter. So you could run a 63-65 hard steel line into a stock filter and then a rubber hose into the carb.
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Old 02-02-2019, 09:30 AM
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Alex, can't see from your photo, how is the choke connected (is it connected)? Factory set up used a choke rod from the carb. to a recess in the intake manifold along with the bi-metal spring & related parts.
Phil M.
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Old 02-04-2019, 12:08 PM
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PAmotorman
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the carb shown in the first picture should have a cup shaped screen in the front float bowl to act as a filter
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Old 02-04-2019, 09:33 PM
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Originally Posted by Vettegeezer View Post
Alex, can't see from your photo, how is the choke connected (is it connected)? Factory set up used a choke rod from the carb. to a recess in the intake manifold along with the bi-metal spring & related parts.
Phil M.
Hi Phil - The carb has an electric choke fitted. It works just fine. The original setup had a divorced choke, but that stuff is now all gone. My guess is that a PO junked the original Holley 3810 and replaced it with the current Holley 1850.
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Old 02-04-2019, 09:36 PM
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Originally Posted by Nowhere Man View Post
Also I don’t think that carb has a internal fuel filter. So you could run a 63-65 hard steel line into a stock filter and then a rubber hose into the carb.
How would I verify/confirm if my carb has an internal fuel filter? There is no external fuel filter on my car. The hard line from the fuel pump goes straight to the carb, via that crappy piece of rubber hose.

So, did Holley 1850's have an internal fuel filter? This was the case with the OEM Holley 3367/3810 carbs that were fitted to the 300/350 hp motors from the factory. Anything's possible, but whoever replaced the OEM carb would have considered the need for a fuel filter - I hope!
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Old 02-04-2019, 09:45 PM
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Originally Posted by DansYellow66 View Post
I think you could use the Marine bowl Holley sells with the correct fitting. They sell a couple of fitting so you would need to verify fuel line fitting size to get the right one.

https://www.holley.com/products/fuel...rts/34R10918AQ

https://www.holley.com/products/fuel...parts/26-27The

The basic carb is fine for your engine. If may not be the high performance Holley line but it's still a very good carb and basically equivalent to what came with the engine originally.
Hi Dan,

Thanks for reassuring me that my Holley 1850 is a good carb. It certainly runs fine. I had it rebuilt last year and so far, so good. I could get a replacement Holley 3357A which is the correct carb for '67 with a 300 or 350 hp small block. These can be had for about $710. But, would I really notice much difference? Your thoughts?

Back to the Holley 1850 on my car... In order to plumb the OEM hard line direct to the carb, would I have to replace the front fuel bowl with one that has a female fitting?

Or, can I screw in an adapter of some sort to allow the OEM hard line to be connected to the front float bowl on the carb I have now?
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Old 02-04-2019, 09:50 PM
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I posted above this screen should be in the fitting. https://www.walmart.com/ip/Holley-26...&wl13=&veh=sem
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Old 02-04-2019, 10:11 PM
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I don't think I've seen an L79 with the metal line all the way to the carb.
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Old 02-04-2019, 10:23 PM
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The L79 used hard line all the way to the carb. The filter was in the carb:


GM didn't use rubber hose on the pressure side of the fuel system. For good reason.
Lars

Last edited by lars; 02-04-2019 at 10:29 PM.
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Old 02-04-2019, 10:24 PM
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65GGvert
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Originally Posted by lars View Post
The L79 used hard line all the way to the carb. The filter was in the carb:


Lars
Was that the case with 65 L79's also? I've only owned 65's that had that engine. This is the one I have now, is it incorrect? (2818-1 with external filter)

Last edited by 65GGvert; 02-04-2019 at 10:32 PM.
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Old 02-05-2019, 09:17 AM
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DansYellow66
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Originally Posted by Mr Fufu View Post
Hi Dan,

Thanks for reassuring me that my Holley 1850 is a good carb. It certainly runs fine. I had it rebuilt last year and so far, so good. I could get a replacement Holley 3357A which is the correct carb for '67 with a 300 or 350 hp small block. These can be had for about $710. But, would I really notice much difference? Your thoughts?

Back to the Holley 1850 on my car... In order to plumb the OEM hard line direct to the carb, would I have to replace the front fuel bowl with one that has a female fitting?

Or, can I screw in an adapter of some sort to allow the OEM hard line to be connected to the front float bowl on the carb I have now?
I don't think any of the 1850s have an internal fuel screen/filter. At least I know the two on my Cobra replica do not and they were installed new. There may be a 90 deg fitting you could find that would adapt your fuel bowl to the factory line. I'm not sure without going on a search. The connection to the carb would have to match the barb fitting on it now. It would have to have an inlet for a compression flare fitting of I believe 5/16 but need to check your new line as it could be a 3/8 inch.. I suspect such a fitting is out there - just take some looking after you verify the inlet size. McMaster Carr would be one possibility.
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Old 02-05-2019, 09:40 AM
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It won’t look exactly factory, however this banjo with a 5/16” tube...

https://www.summitracing.com/parts/sum-g3144/overview/

...can be used with this compression fitting to join the hard line from the fuel pump to the carb.

https://www.summitracing.com/parts/rnb-800-142

Simply trim the end of the nipple off the banjo tube and use the double compression to join the hard line from the fuel pump. For less than $20 you are done!

BTW, I didn’t mean to imply you carb is “no good”. It is an excellent and reliable carb. It just lacks the performance upgrades that make it a true performance carb.
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Old 02-05-2019, 11:57 AM
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Originally Posted by 65GGvert View Post
Was that the case with 65 L79's also? I've only owned 65's that had that engine. This is the one I have now, is it incorrect? (2818-1 with external filter)
The '65 uses a different carb than the '67. The '65 is just like your's that you have pictured here.

Last edited by provette67; 02-05-2019 at 01:55 PM.
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Old 02-05-2019, 01:05 PM
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Originally Posted by Factoid View Post
It won’t look exactly factory, however this banjo with a 5/16” tube...

https://www.summitracing.com/parts/sum-g3144/overview/

...can be used with this compression fitting to join the hard line from the fuel pump to the carb.

https://www.summitracing.com/parts/rnb-800-142

Simply trim the end of the nipple off the banjo tube and use the double compression to join the hard line from the fuel pump. For less than $20 you are done!

BTW, I didn’t mean to imply you carb is “no good”. It is an excellent and reliable carb. It just lacks the performance upgrades that make it a true performance carb.
Now that's spooky. https://www.corvetteforum.com/forums...post1598819609
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