Holley question....

[fe-starliner]

I bought a complete factory 6V setup....original manifold, carbs, linkage, fuel log and air cleaner.  Upon disassembling the 2 barrel carbs I found one of the secondary carbs had a metering block numbered 2085 instead of the correct #3434. Does anyone know what the #2085 came on originally?  Compared to a normal metering block...at least the ones I'm familiar with.... it has a California shaped channel located on the lower left and there are two channels at 5:00 and 7:00 in relation to the power valve.  Of course the original secondary metering blocks had no power valve.  Should I block the power valve and just use this metering block?  or find another?  Really curious what the#2085 came on....I've searched the internet and found nothing.  Maybe I just didn't look in the right place....

[RJP]

I can't tell you what that metering block is for exactly but I can tell you that those 2 channels at the 5 and 7 'o-clock positions are found on 1957 OEM Y-block Holleys. I just rebuilt 2 of those Holleys for a customer that has 2 restored 57 T-birds with 312s. If you need a list number of the OEM carbs I can provide it when I get into the shop tomorrow. IIRC The list is 12XX.

[Drew Pojedinec]

RJP,
What is the purpose of those extra channels?

[fe-starliner]

Thanks for the information RJP.  While I was curious about the original application of the #2085 metering block, since I don't know reason for the extra channels the main purpose of the post was to get some advice/knowledge about there being any problems if I continued to use it (with a PV block off) considering it has the extra channels.

[babybolt]

Holley metering block 2085 is a primary block from a list number 1426 or 1616 Holley for a Merc 361. 

[RJP]

RJP,
What is the purpose of those extra channels?

Drew, Off hand I don't remember. I'll need to dig up the spare parts [metering blocks and main bodies] of those 2 carbs I built. I still have a couple of parts carbs I needed for parts to complete the customer's rebuilds. When I get to the shop I'll check 'em out.

[Drew Pojedinec]

Taking a better look at them and thinking about it some.....

It looks like that is the main well to idle well feed.  The low IFR position (unused in this metering block) only has one hole which goes to the idle well, the typical crossdrilled well which is the main to idle feed doesn't appear to have been used.


Huh, interesting.  I love the mid to late 50's era carbs, they were making a lot of changes.

[fe-starliner]

thanks for the info babybolt.....your effort is much appreciated

[RJP]

Taking a better look at them and thinking about it some.....

It looks like that is the main well to idle well feed.  The low IFR position (unused in this metering block) only has one hole which goes to the idle well, the typical crossdrilled well which is the main to idle feed doesn't appear to have been used.


Huh, interesting.  I love the mid to late 50's era carbs, they were making a lot of changes.

I don't have that metering block and main body anymore so I can't trace the path but I think it is a fuel passage for the transfer slot. Perhaps Holley thought early on that a semi separate transfer circuit was needed.

[TorinoBP88]

If it is a secondary carb I would block the PV.

[fe-starliner]

Thanks TorinoBP88, that's what I was planning on doing as it is a secondary carb.  But I was asking if it would be OK to use this metering block...or buy another and block it, since the channels are different.