Holley replacement

[Joe L.]

Re: Holley replacement

Joe,

The 80457s was the first one I looked at because that is what Jeg said would work, I found one at a parts house. I took my gasket with me to see if the bolt pattern fit my intake, it didn't, not ever close. That is where they said I needed and adaptor plate, so I kept looking. Advance is trying to help me with my problem. They are ordering in 2 Holley's, one that has 600 cfms and other has 650 cfms. They both are gold which is what I wanted, but I still have to see if the bolt pattern fits my car. Like I said earlier I'm replacing a 3810 with the wrong date, so what ever I do it has to fit my intake, and it is original to the car. I didn't think this would be a problem finding a carb. I will update everyone when I get to see the carbs coming in and what decision I make. Advance said they both will fit my car, we will find out today or tomorrow for sure.

Again, I want to thank everyone that has tried to help me.

Bob

A

Bob-------


I'm flabbergasted that the80457S won't fit your manifold carb flange. Both the original and 80457S have 1-5/16" venturi size. Also, I can't imagine what adapter the parts folks are referring to. I don't know of any adapter to adapt a Holley carb to a square bore manifold.

[Timothy B.]

Re: Holley replacement

I have never heard of a reproduction 3810 carburetor, how much do they cost? Bob, where is the current Holley leaking and can you briefly describe the symptoms that are driving you crazy.

IMO, if you switch to a generic carburetor like a regular 600 Holley vacuum secondary, I would try the Quik fuel carburetor.

[Leif A.]

Re: Holley replacement

I have never heard of a reproduction 3810 carburetor, how much do they cost? Bob, where is the current Holley leaking and can you briefly describe the symptoms that are driving you crazy.

IMO, if you switch to a generic carburetor like a regular 600 Holley vacuum secondary, I would try the Quik fuel carburetor.

Tim,
Access the link in my post #11. They're around $680.

[Ralph E.]

Re: Holley replacement

The 80457S was a direct fit for my car. 327/300hp MT. Used it while I rebuilt my 3810. No adapter needed.
Still have it as a spare on the shelf just encase I ever need it again.

[Bob M.]

Re: Holley replacement

I purchased a Holley, the numbers are 4150 series 080783C. It fit my bolt pattern, that is all I wanted. I have to make fuel line changes because it has dual inlets. Only thing left to do is find an electric source for the electric choke so I can go down the road. I'm posting what I bought just incase someone needed help too. It is a 600 cfm carb, the 650 cfm carb Holley has wouldn't fit the bolt pattern.

Thanks again to everyone.

Bob

[Jim T.]

Re: Holley replacement

Bob for 12 volts you could run a wire from the fuse block "IGN" terminal since it is usually not used. Also you could connect to the 12 volt ignition wire input at your ballast resistor for the electric choke. Both of these locations would only provide 12 volts when the ignition switch is on. My 1970's Holley electric choke is connected to the fuse block "IGN" terminal.

[Joe L.]

Re: Holley replacement

I purchased a Holley, the numbers are 4150 series 080783C. It fit my bolt pattern, that is all I wanted. I have to make fuel line changes because it has dual inlets. Only thing left to do is find an electric source for the electric choke so I can go down the road. I'm posting what I bought just incase someone needed help too. It is a 600 cfm carb, the 650 cfm carb Holley has wouldn't fit the bolt pattern.

Thanks again to everyone.

Bob

Bob------


I still don't understand this. The bolt pattern of the 80457S and the 80783C, as well as most other Holley square bore carbs, should be exactly the same. As Ralph Esposito reports above, he actually used the 80457S on an application exactly the same as yours.

Are you sure the 80783C will work for you? Your original carb and the 80457S have 1-9/16" venturi/throttle valve size (I mis-typed in my response above in which I said 1-5/16"). The 80783C has 1-11/16" venturi/throttle valve size. The throttle valves may interfere with the bores in the manifold's carb flange.

[Joe L.]

Re: Holley replacement

The 80457S was a direct fit for my car. 327/300hp MT. Used it while I rebuilt my 3810. No adapter needed.
Still have it as a spare on the shelf just encase I ever need it again.

Ralph------


Did your stock air cleaner base fit OK on the 80457S?

[Frank D.]

Re: Holley replacement

My test for a Holley is this: Throw it into the nearest lake, if it floats its good; if it sinks its bad...

Quick Fuel makes an excellent replacement carb. After a few weeks of screwing around with the Holley on my '67 SS-396 Chevelle.
I dumped it and went with a QF. One change of idle air bleeds to dial it in and I was off and running !

[Ralph E.]

Re: Holley replacement

Ralph------


Did your stock air cleaner base fit OK on the 80457S?

Joe,
Like I said. Carb was a direct fit. Air filter fit, linkage fit, gaskets fit. The only mod was for the fuel line, which was a simple mod.
Yes it does have an electric choke, but that is not big deal. Just needed 12V power from ballast resistor.

[Bob M.]

Re: Holley replacement

Joe,

That was the first carb I looked at, everyone said that would work. I took my base gasket with me to Advance and the one they showed me wasn't close to my bolt pattern. I'm a newbie with the Holley and mid-years, my interest was and still is C-1's, but I am learning about these cars. I don't know why the 80457s didn't fit, maybe the box was marked wrong. By the way I had to get a different air cleaner base for this carb because of the top profile incase someone wants to get this carb. My L79 sure looks good with this carb and I really didn't want the shinny one.

I started the car yesterday, but tested the linkage first to make sure that it worked freely, no problem there. Fired it up, ran good, today I'll take the car for a short drive just make sure there isn't something I overlooked.

I want to say it again, thanks to all who took the time to respond to my problem.

Joe have fun at Carlisle.

Bob

[William F.]

Re: Holley replacement

Yes, I've bought reproduction Holley carbs from Specialty parts. However, you should be aware that they're not EXACTLY like the originals. Bowl screws have hex heads rather than screwdriver slots, some areas of the carb are reinforced to prevent warping, the gaskets are the newer blue reusable gaskets rather than the old paper gaskets. All these changes give better functionality and are as close in appearance and design as you can get in a new carb. Just be aware of changes that could affect judging, if you care. There is a place in Calif, I believe that will take one of these new carbs and make it look just like the original- for a price, again, if you want to go this far.

[Joe L.]

Re: Holley replacement

Yes, I've bought reproduction Holley carbs from Specialty parts. However, you should be aware that they're not EXACTLY like the originals. Bowl screws have hex heads rather than screwdriver slots, some areas of the carb are reinforced to prevent warping, the gaskets are the newer blue reusable gaskets rather than the old paper gaskets. All these changes give better functionality and are as close in appearance and design as you can get in a new carb. Just be aware of changes that could affect judging, if you care. There is a place in Calif, I believe that will take one of these new carbs and make it look just like the original- for a price, again, if you want to go this far.

William-------


Yes, there are minor differences between the reproduction Holleys and the original carbs. For instance, the new carbs have no date code on them (although I suppose someone might be able to add one). Also, I never stated that these carbs are an EXACT-in-every-way reproduction of the original; I said that they are an EXACT bolt-on. In other words, they can be installed exactly as-original with no modifications, at all. No doubt they will not garner full judging points but they should garner more than anything else besides a restored original carburetor. To me, though, the loss of judging points is not as important as having a NEW carburetor. Nothing makes a car run like a NEW carburetor.

By the way, the original style float bowl screws are available in the reproduction market-place. I have no idea why Holley does not use these in the first place. Original style gaskets are also available (not that I would EVER use them).

[William F.]

Re: Holley replacement

Hey Joe,
I wasn't arguing, just making sure everyone knew there were subtle differences, all to improve functionality, even if you'd lose some judging points. As far as the hex head bowl screws, much easier to get proper torque without worrying about wallowing out screw slot type heads.