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91
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by 1967 XR7 GT on September 08, 2026, 06:01:06 AM »
Quote from: pbf777 on September 07, 2026, 12:03:02 PM
Quote from: 1967 XR7 GT on September 06, 2026, 04:15:39 AM
. . . . . . . dull, flat colorless, lacking any Iridescence, crap job.

. . . . . .  as can be seen it's just a flat green color, will try later to provide a better complete pic of the carb.

     Though the coloration of your carburetor might not be what you were hoping for, it actually isn't unlike that of what many having come out of Holley looked like, "originally".  The finish as delivered by Holley wasn't very consistent, and the individual componentry items were often different in coloring, and this only became more so as the decades progressed.   :o

      And with this observation,  I'm of the opinion that some of the quite bright finishes as being executed today of "refinished/restored" examples as has become expected, being required in the industry to provide the impression of a quality execution, but is not representative of mostly that as which Holley provided , back then.   :)   

      Scott.

Here is an example of color from back then, it's my NOS Holley 4604-S 1050 CFM 3 Barrel, the color has faded some I would think since the late sixties code 973 Year 1969, month 7, in the 3 week, over 50 years.
92
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by 1967 XR7 GT on September 08, 2026, 05:31:00 AM »
Quote from: Drew Pojedinec on September 07, 2026, 10:52:51 AM
Richard, wet blasting is a process.
Vapor honing is a specific manufacturer.

Kinda like Kleenex is a name for all tissues.


In this case the blaster either used really coarse media or the carb sat too long and oxidized, both can cause your issues.

I tried to clear this up as I don’t care for misinformation.
Good luck.

Vapor honing and vapor blasting are often used interchangeably, but they have subtle differences. Vapor honing typically involves a higher water-to-abrasive ratio, resulting in a gentler finish, while vapor blasting may use a more abrasive approach for tougher materials.

As I said before, my carb was done in a batch of carbs by my carb guy, the other carbs he put thru his cleaning process which was - a 2 stage bead blast. Medium grit with high pressure, then fine glass bead with low pressure, my carb was not put thru this process because everything was already clean from the Vapor Honing. Out of all the carbs he colored that day mine was the only one that came out as it did.

The issue I had, the carb guy never notified me of the coloring issue, he just sent my carb back the way it was.

I've provided no misinformation, only facts.

But, Drew since your so experienced and know it all, I've got nothing more to say.
93
Private Classifieds / Re: WTB: 427 high riser tunnel wedge intake manifold
« Last post by hbstang on September 07, 2026, 05:00:00 PM »
you say not generally but thats how it is.supply and demand.the original hi rise f and d intakes start around $2500 for a good one,and they work well in nhra stockers like the fairlanes,in the 9s in stock legal trim.why not use one of them?
on another note,sohc intakes can start at$5k,like the ones on ebay.
there is another alternative,have one cast for you.wih the new tech in printed sand molds for aluminum castings,its not as cheap as regular castings but it can be done,just need the digital designs for.
94
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by Drew Pojedinec on September 07, 2026, 03:50:19 PM »
Scott, I agree with you 100% on post 1967 carbs.
Post 67, quality control and outside vendor usage fluctuated a lot more.
I kinda went down this rabbit hole some time ago lol.

I have studied the original earlier carbs extensively and find my chromate matches what is seen in the originals (once it calms down after a year or two).
The pictures I post are typically right after the coating is applied. I save some restored parts for years to see how it ages. Once it mellows down my stuff gets darker and less blingy.
I’ve shown nos stuff vs some of mine a few years later and it isn’t that far off.

That said, my personal view is any coating is original once…..  after that it is just going to be different. I wasn’t at the Holley factory in 1964, nor was anyone else I know, so we are just throwing darts blindfolded anyhow.
95
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by pbf777 on September 07, 2026, 12:03:02 PM »
Quote from: 1967 XR7 GT on September 06, 2026, 04:15:39 AM
. . . . . . . dull, flat colorless, lacking any Iridescence, crap job.

. . . . . .  as can be seen it's just a flat green color, will try later to provide a better complete pic of the carb.

     Though the coloration of your carburetor might not be what you were hoping for, it actually isn't unlike that of what many having come out of Holley looked like, "originally".  The finish as delivered by Holley wasn't very consistent, and the individual componentry items were often different in coloring, and this only became more so as the decades progressed.   :o

      And with this observation,  I'm of the opinion that some of the quite bright finishes as being executed today of "refinished/restored" examples as has become expected, being required in the industry to provide the impression of a quality execution, but is not representative of mostly that as which Holley provided , back then.   :)   

      Scott.
96
FE Technical Forum / Re: Valve Adjustment Advice Needed
« Last post by Diogenes on September 07, 2026, 11:06:58 AM »
They have worked out well. I've not had to mess with valve adjustments since getting it sorted.
97
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by Drew Pojedinec on September 07, 2026, 10:52:51 AM »
Richard, wet blasting is a process.
Vapor honing is a specific manufacturer.

Kinda like Kleenex is a name for all tissues.


In this case the blaster either used really coarse media or the carb sat too long and oxidized, both can cause your issues.

I tried to clear this up as I don’t care for misinformation.
Good luck.
98
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by 1967 XR7 GT on September 07, 2026, 09:17:57 AM »
I did some research, what I had done was called "Vapor Honing", there is also "Vapor Blasting" "Wet Blasting,"  and "Dustless Blasting" these processes are all different.

So, I need to up date my warning: Do not do Vapor Honing to your Holley Carb before  coloring. As to Vapor, Wet, and Dustless Blasting, you'll have to do your own research as to  the coloring results after, I've not used those processes so I don't know their results.

My Intake Manifold I had used Vapor Honing not Vapor Blasting, and I now remember I had Vapor Honing done to protect the Manifold, as was demostrated to me I took dirty grease and wiped a spot on the Manifold, then wiped it off with a rag, no discoloring, stain or any indication that grease had been on the manifold. If grease had been wiped on a Manifold that had been bead or sand blasted, there would be a stain where it was applied.
 


99
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by Drew Pojedinec on September 07, 2026, 05:19:37 AM »
Only a few people do partial jobs.
I’m not one of them at this time.

My point was, the wet blasting didn’t cause the issue.


And yes, that is why I told the customer I would not use a metering block.
100
FE Technical Forum / Re: Holley Prep for Dichromateing
« Last post by 1967 XR7 GT on September 07, 2026, 04:40:38 AM »
Quote from: Drew Pojedinec on September 06, 2026, 06:18:07 PM
I just did this one.
Wet blasting isn’t the cause of your issue.

https://www.facebook.com/share/1JoPJyntVR/?

Who did the work?

I have his card somewhere, It was someone you recommended, I had asked you 1st but you didn't have time, said you were backed up and had to go back to work, the carb work were side jobs when you were home ? This was a while ago.

I sent it to be colored, have the vent tubes pulled, and drill & tap the main body air bleeds for screw in bleeds.

I looked at your link of your colored carb, I assume the carb you pictured at the end was the carb before the color, it had a metering plate on the 2ndary side, which is a problem, which I am sure your aware of, the air bleeds on a 3 barrel 2ndary are in a different location so a stock metering plate won't work correctly, if that carb ran that way it had big problems, and could never have been tuned, or at least not the 2ndary side.

I was playing around modifying a metering plate to work on the 2ndary side to beable to run 4 corner idles, don't remember if I finished it but was close. But I did get the aftermaket metering plate for 4160 carbs for the 3 barrel 2ndarys to add jets just in case.

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