#21  
Old 10-04-2021, 10:22 AM
"QUICK-SILVER" "QUICK-SILVER" is online now
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Quote:
Originally Posted by Bruce Meyer View Post
You wouldn't happen to know what part # those spreadbore bowls are.
Which type bowls/s are you looking for?

Looks like Holley only has replacement for front single line.

https://www.holley.com/products/fuel.../parts/134-110

And you can still get the 6210 new.

https://www.holley.com/products/fuel...t/parts/0-6210

The obsolete dual line conversion kit for these was Holley PN # 34-4.

Clay

  #22  
Old 10-04-2021, 12:02 PM
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1) I still see lots of Holley used carbs at swap meets in the $15 to $35 range.
Most are slightly used but still very good ZINC parts on them.

Holley went from Zinc material Carbs to Aluminum Material Carbs.
Zinc plating will last for many years without issues. A friend of mine who worked
at Holley, with me, still does some "re-plating" using proper chemicals but not
OSHA approved.

But the key deal is that aluminum carbs do not last. Great for a Big Name carb seller.
More sales, cheaper costs, more profits.

Personally I would pay any day to acquire a couple of used Swap Meet Zinc Carbs,
and run them as is or have them plated. Then you have a lifetime carb.

The good Gaskets are still out there, I have hundreds of the good BLUE bowl gaskets
for the 4150 carbs. 4165 and 4175 carb parts (gaskets) much less.

Not a sales pitch. Rarely sell carb rebuild kit parts.

Just saying. The old stuff was calibrated by Carb Engineers who had tons of Carb knowledge.
Mike Urich, Chief Engineer, and book writer being one of them. Mike was a good guy.

So my post here is a carb information post, not specific to this discussion on Spread Bore Holley Carbs.

Tom V.

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Last edited by Tom Vaught; 10-04-2021 at 12:13 PM.
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  #23  
Old 10-04-2021, 01:50 PM
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Quote:
Originally Posted by "QUICK-SILVER" View Post
Which type bowls/s are you looking for?

Looks like Holley only has replacement for front single line.

https://www.holley.com/products/fuel.../parts/134-110

And you can still get the 6210 new.

https://www.holley.com/products/fuel...t/parts/0-6210

The obsolete dual line conversion kit for these was Holley PN # 34-4.

Clay
Im looking for the race bowls. It looks like Holley discontinued them for the spreadbores.

  #24  
Old 10-04-2021, 03:00 PM
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Quote:
Originally Posted by Tom Vaught View Post
I and Cliff Ruggles would disagree with you on his 850 cfm Holley Carb with the 50cc pump on the carb ON THE FRONT.

In some applications if you add the 50cc pump and open up the air bleeds on the primary side of the carb about .004" the set-up is happy with the 50cc pump on the front. I helped Cliff with his carb.

The KRE guys dynoed that Holley carb and they told Cliff:
"Don't touch that carb it is perfect on the dyno."

Tom V.
I was talking about the 650 the OP posted the link to.

"Holley Carburetor List 6210 Spread Bore 650 cfm Double Pumper dated 3343"
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  #25  
Old 10-04-2021, 04:02 PM
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Quote:
Originally Posted by JSchmitz View Post
You can probably still get a 650 with side hung bowls. The carb that Tom showed has not been available for a long time. Still lots to be had if you don't mind going through one.
Yeah, they're "only" around $750 too.

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Old 10-04-2021, 07:30 PM
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Quote:
Originally Posted by SRR View Post
I was talking about the 650 the OP posted the link to.

"Holley Carburetor List 6210 Spread Bore 650 cfm Double Pumper dated 3343"
OK Thanks.

Quote:
Originally Posted by NeighborsComplaint View Post
Yeah, they're "only" around $750 too.
Those carbs at one time sold new for well under $300 at speedshops.

Tom V.

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  #27  
Old 10-05-2021, 12:35 PM
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About 20 years ago I bought a holley 650 spreadbore for my TA. Paid a little over $200 for it. Now they are $700.

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  #28  
Old 10-05-2021, 05:00 PM
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OK Thanks.



Those carbs at one time sold new for well under $300 at speedshops.

Tom V.
Yeah. Around $750 new these days for the 650. Yikes.

No new 800's.

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  #29  
Old 10-05-2021, 06:49 PM
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In about 1974 my original Quadrajet died a premature death and I went down to the local speedshop to locate a replacement. Purchased a new 800 CFM double pumper Holley spreadbore on sale for $76 and tax. Don't remember why but he had a massive stack of them and must have got a deal on them from Holley. Ran it for the next 25 years until I went back to a Quadrajet, and probably the most trouble free Holley I ever ran.

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  #30  
Old 10-05-2021, 07:37 PM
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The 800 spreadbore was/is a great carb. It's bizarre that Holley stopped making them. With all the GM cars out there that want to run the original style cast iron intake, I would think there is more than enough demand for them.

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  #31  
Old 10-05-2021, 07:53 PM
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After going Bankrupt 3 times Holley Carburetor is not the same company that made the excellent 650 and 800 spread bore carbs of the old days.

Their EFI stuff is doing well because NASCAR is using some of their stuff on the cars.
And the EFI stuff is pretty darn good for a moderate cost EFI system.
MOTEC and the other high end stuff being better in my opinion but only for cubic money type vehicles (think land speed record platforms).

That being said there is little that is the same on the calibrations.
The old calibrations for the majority of the "Chevy bolt on carbs" was paid for by GM Engineering paying Holley to do the
calibration work.

Most of the casting work has been farmed out to the offshore countries C*ina

Tom V

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  #32  
Old 10-05-2021, 08:10 PM
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Quote:
Originally Posted by Tom Vaught View Post
After going Bankrupt 3 times Holley Carburetor is not the same company that made the excellent 650 and 800 spread bore carbs of the old days.

Their EFI stuff is doing well because NASCAR is using some of their stuff on the cars.
And the EFI stuff is pretty darn good for a moderate cost EFI system.
MOTEC and the other high end stuff being better in my opinion but only for cubic money type vehicles (think land speed record platforms).

That being said there is little that is the same on the calibrations.
The old calibrations for the majority of the "Chevy bolt on carbs" was paid for by GM Engineering paying Holley to do the
calibration work.

Most of the casting work has been farmed out to the offshore countries C*ina

Tom V
So true!

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