Holley 2818-1 Carb Metering Jets

[Ray K.]

I'm in the process of re-building my 65's Holley 2818-1 carburetor and noticed that the primary and secondary fuel metering jets are both stamped with 76. I had always thought that the primary metering jets were a "lower" number and the secondary jets a "higher" number. Can anyone tell me if these are the correct metering jet sizes? If not, what should they be. Also, the power valve that's in the carburetor is stamped with a 65. Can you let me know if this is also the correct size?


Ray Krawczyk
NCRS# 43777

[Timothy B.]

Re: Holley 2818-1 Carb Metering Jets

Ray,

The correct jet sizes for your 2818 Holley are #65 primary and #76 secondary. The 65 stamped power valve is the stock part and simply means the valve will allow for enrichment and open at a vacuum level of 6.5".

If you have a small drill bit set it may be a good idea to check the idle feed restriction (idle and low speed jet) size as well as the low and high speed air bleed size to make sure the last person has not enlarged the holes. I believe the IFR size is .031 and the low speed air bleed is .070 and high speed bleed at .028 but double check these sizes as I am going from memory.

[Ray K.]

Re: Holley 2818-1 Carb Metering Jets

Ray,

The correct jet sizes for your 2818 Holley are #65 primary and #76 secondary. The 65 stamped power valve is the stock part and simply means the valve will allow for enrichment and open at a vacuum level of 6.5".

If you have a small drill bit set it may be a good idea to check the idle feed restriction (idle and low speed jet) size as well as the low and high speed air bleed size to make sure the last person has not enlarged the holes. I believe the IFR size is .031 and the low speed air bleed is .070 and high speed bleed at .028 but double check these sizes as I am going from memory.

Tim,
Thanks for the info . . . . I'll take a look at the idle feed restrictions and see if they've been enlarged.
Ray