FE Power Forums
FE Power Forums => Non-FE Discussion Forum => Topic started by: hwoods on December 21, 2023, 11:09:57 AM
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https://youtu.be/LAC6cxFhRlw?si=BFKS2s2Gt5hdwNnR
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Unbelievable, 77 years old and his reflexes still let him be the number one qualifier.
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This post is ALL ABOUT FE's! It may be mis-classified but Mr. Pauley's accomplishment is a pretty big deal. I hope he can carry the torch to the finish line. Looks like he's in good hands in the engine dept. Thanks for posting!
https://www.jonesenginedevelopment.com/
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I observed a couple of interesting things in the video, one is the use of the dual inlet primary carb bowl in his fuel system plumbing.
I am aware of the original use on the 428CJ, and I believe some 390GT's, but does anyone know if this is a rule requirement in this stock class, or personal choice/preference?
There was other stuff too, that one just jumped out at me.
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NHRA Stock Eliminator carb rules require OEM-style fuel delivery system; generally, without options. In a few instances of QuickFuel "accepted" replacement carbs variations have been permitted to facilitate QF's use of different fuel bowls than OEM. I'm sure you probably heard him say during the carb description that it was a "780" not a "735" cfm; that would also confirm that the carb is a QF replacement instead of the original 735 which could account for an unfamiliar, but still Tech-legal delivery system. I know of no NHRA Stock class 428 powered car that still runs the 735 carb when he can "legally" avail himself of an additional 45 cfm. I'm not privilege to any of the reasons NHRA decided on this gift.
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Pretty sure that both the Holey 780 and 735 share the same throttle plate diameters and venturi sizes, and that the reduction to a 735 is due to the "bell bottoms" on the bottoms of the boosters. Since NHRA only measures the venturi and throttle blade sizes during a teardown, they are OK.
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Pretty sure that both the Holey 780 and 735 share the same throttle plate diameters and venturi sizes, and that the reduction to a 735 is due to the "bell bottoms" on the bottoms of the boosters. Since NHRA only measures the venturi and throttle blade sizes during a teardown, they are OK.
Applying that rationale suggests that a competitor should be able to change the boosters configuration in an OEM carb and that , definitely, is not the case. You must run the factory boosters even if there is an "accepted" replacement carb (QF) with a different configuration. That said, I'm certain that some non-standard boosters have slipped through tech during tear-downs.
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Nowhere in the NHRA Rule Book does it mention carb boosters, only throttle and venturi sizes. Before the QF carbs were allowed, many 428 CJ Stockers ran Holley 3310 780s, or Boss 302/429 SCJ factory 780 Holleys, and passed NHRA teardowns. I set several NHRA National records in my 85 Mustang 5.0 in M & N Stock, and went thru NHRA teardowns 3 or 4 different times, and never once did I observe the Tech team measure a booster. And I did this with both the factory Holley/Motorcraft 4180, which has large, annular discharge boosters, as well as a universal 1850 600 vacuum secondary carb, with had regular boosters, and had the same sized venturis and throttle blades as the original carb. No mention was ever made about the boosters.
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I'm painfully aware that each NHRA Div. Tech operates practically autonomously from other divisions and all of my certification tear down experiences have been in the Eastern half of the US. (Is this where we discuss the "West Coast" Rulebook?)
I simply offer the citation of one incident during (if memory serves) the 2020 "Baby" Gator Nationals sportsman event where the #1 Stock qualifier, Gary Summers, was torn down and subsequently DQ'd based on multiple arbitrary rulings concerning his carb; one of which was booster nozzle violations (among other issues). Sorry, I may not have the correct year but the era is close.
Additionally, quoting the Rulebook, re: HOW TO USE THIS RULEBOOK, Performance Equipment "...it is the general rule that unless optional performance equipment or performance-related modification is specifically permitted by this Rulebook, it is prohibited".
Sorry I raised your ire, my intent was to help someone answer his observation about Paulie's fuel delivery system as it related to the use of a QF carb.