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While I’m a fan of technology and its benefits, it can be frustrating when your tablet isn’t charged, your internet connection is on the fritz, or the PDF you’re viewing can’t be easily searched. This means that in my line of work I still read a lot of textbooks and service manuals to stay current and learn new material. I find myself building an arsenal (library) of hot rod information that can be navigated in short time to find the answer I need. So, I felt it would be best to start a little segment called “From the Archives” in which I recommend a tool or textbook that everyone should have in their man cave or garage.
Today’s subject, the Holley Illustrated Parts Manual (also known as the “Black Book” for obvious reasons) lists factory specifications on a slew of carburetors (mid 50’s - 80’s) as well as having a collection of exploded view diagrams that come in handy on the odd-end rebuild. I’ll walk through an example of finding a factory spec on an older Mopar carb and I can bet that you’ll be finding this old behemoth as useful as I do when we’re finished. Let’s get started!
1. The 0-4236 came factory on the Hemi Cross Ram Racing Setup, specifically the Left-Side. At 770cfm, it is still a popular replacement muscle car carb offered by Holley.
2. Above is the listing for our Carburetor, we can find service parts, jetting and more from this information.Once we have identified our list number, we can begin decoding; References can be found on pg. IV in the front of the manual. -T.V. (Typical View) 24-2 is the diagram we will reference. -VI (Pump Cam Position) #1 Hole -Example: (12)5R-155 is Item 12 on the diagram, with a service number of 5R-155.
3. Let’s navigate to T.V. 24-2 (Page 262), We can see that our Main Primary Jets are Item 78 on the exploded view diagram.
4. On page 263, we find the listing/explanations of every item as well as their service part number (where applicable). Navigating to item 78, we confirm that it is the primary jet. The "X" tells us that we need to navigate back to our original listing for a part number.
5. Referring to our earlier Listing, we can see that Item 78 calls for 22R-40-80, which tells us this carburetor came factory with 80 Primary Jets. We can also see a 6.5 power valve (Item 83) as well as an .035” Discharge Nozzle (Item 77).
Finished! We can check our work by looking at Holley’s “Master List” (found HERE on their website). This document contains an abbreviated list of carb numbers and calibrations.
For videos, instructional guides, tuning manuals and more on all of Holley's various carburetors, check out the Carburetor Tech Info section.
For more information on Holley Performance carburetors check out the brand page.
For more technical information and helpful instructional guides check out Holley's support section.
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