1965 327/365HP Carburetor Purchase

[Peter P.]

In a previous posting I requested assistance re: search for original rebuilt or new carburetor for the 1965 327/365 HP car.

For the time being, I 'd like to buy a new one. Recommendation when calling a Holley dealer was for a Holley 600 CFM with a 64 primary jets and 39 secondary jets and a 65 power valve. Standard and avail now new.

In the previous NCRS posting response I was instructed to look for any Holley that had a 585 CFM, 65 primary and 72 secondary jets.

Before I purchase the new carb from Holley, can anyone comment as to whether the carb recommended is ok for the application or should be enhanced in anyway?

Thank you

[Joe L.]

Re: 1965 327/365HP Carburetor Purchase

Pete----

The original carb for your application was a Holley 2818-1 and of approximately 600 CFM (may have actually been rated at 585 CFM). This was a carb of Holley model number 4150. It used primary jets of Holley #65 with a hole size of .065" and secondary jets of Holley #76 with a hole size of .084". The power valve was a Holley #65. A model 4150 carb uses primary and secondary metering bodies; the jets screw into the metering bodies.

The carb that you have discussed with your Holley dealer is likely a Holley model 4160 carb. In a 4160 carb, conventional screw-in jets are used for the primary metering body. However, the model 4160 uses a metering PLATE for the secondary jets which are a permanent feature of each plate part number and, to change, the plate must be changed. The Holley #39 is the number for such a metering plate. It has a main metering hole of .073".

So, the carb that you are discussing with your Holley dealer has primary jets of Holley #64 or .064 hole size and secondary metering plate #39 with .073" hole size. The original recommendation that you received was for jet sizes very close to the original sizes used on the 2818-1 carb. The primary jet size of the replacement carb is very close to the original jet size of the 2818-1 carb. The secondary main jet size is somewhat smaller, but I think that it's a good place to start. If you wish, you can change the secondary metering plate to a Holley #46 which has a main metering hole of .082", which is close to the original.

Another option would be to ask your Holley dealer for a model 4150 carb, like the original used on your car. This carb would have primary and secondary metering bodies and replaceable jets in both, like your original carb. The problem is that most model 4150 carbs currently built by Holley are for higher CFM ratings. I recommend staying close to the 600 CFM range.