Tear Down B/S ... must read - Page 2

Dave Casey · 08-29-2025, 05:16 PM

Nothing but respect for Mr Williams, just one of those rules that has bit more than one racer. No performance advantage, but carbs are an area that they look at closely ,,,,when they look,,,, which is not to often

Ken Miele · 08-29-2025, 05:23 PM

Quote:

Originally Posted by Steve Stasko

I don't understand this post. The rulebook clearly states the holes may be drilled in the PRIMARY plates, other modifications prohibited.

Did you not read that I modified my 735 with NHRA giving me the okay. Do you understand now?

Jrh5220 · 08-29-2025, 05:46 PM

Quote:

Originally Posted by GTS340

Not much idling going on with the secondaries.Not sure why you would do so.

Paul H

I have seen quit a few Holleys with secondary?s crack open, that helps the idle..

Pat6868 · 08-29-2025, 06:19 PM

A secondary stop/ idle screw allows you to adjust idle while positioning primary blades properly over transition slot.

Mark Yacavone · 08-29-2025, 07:04 PM

Question. How does a carb with four corners idling get approved for stock and super stock?

Alan Roehrich · 08-29-2025, 07:08 PM

Quote:

Originally Posted by Mark Yacavone

Question. How does a carb with four corners idling get approved for stock and super stock?

We were told, by NHRA, in writing, when we worked with Quick Fuel on the replacement carburetors, that the secondary idle mixture adjustment had to be set and then have plugs driven in. The carburetors came with the lead plugs. The secondary plates were drilled.

Steve Stasko · 08-29-2025, 07:18 PM

Quote:

Originally Posted by Ken Miele

Did you not read that I modified my 735 with NHRA giving me the okay. Do you understand now?

I did Ken. With all due respect, you mentioned that you made booster modifications to the 735. That is not a secondary throttle blade. I believe the booster modification falls under the section of the carburetor rule that states ‘fuel and air bleed passages may be resized’.

SS3860 · 08-29-2025, 07:48 PM

Just talked to my Carb builder, no holes in secondary plates, could cause issue with vacuum secondary opening.
SP carbs built QFT 780

Tom Flowers
E/SA 3860

Ken Miele · 08-29-2025, 07:49 PM

I think you missed the most important part of the rule, and its the part you quoted. "Other modification prohibited". I don't agree that the booster falls under fuel passage and air bleeds rule. My booster was changed and it increased air flow dramatically because they were much smaller and it was approved. My point is, they let me change the booster and I get a gain in power, but two small holes with no power gain are suddenly grounds for being DQ'd. The rule makes no sense and should be changed.

larrylomascolo · 08-29-2025, 07:55 PM

Dan had this carb with the holes at a previous tear down and it was no issue carb passed.so now it does not pass tech..This is so not right .not a power gain .double standard this should be protested . . He and car were dialed in.this is so sad..probably wont see the Williams Bros. Stockers no more.... . SAD

08-29-2025, 05:16 PM	#11
Dave Casey VIP Member Join Date: Dec 2002 Location: Hampden, MA Posts: 1,207 Likes: 233 Liked 804 Times in 168 Posts	Re: Tear Down B/S ... must read Nothing but respect for Mr Williams, just one of those rules that has bit more than one racer. No performance advantage, but carbs are an area that they look at closely ,,,,when they look,,,, which is not to often __________________ Dave Casey 1330 STK

08-29-2025, 06:19 PM	#14
Pat6868 Member Join Date: May 2010 Posts: 103 Likes: 6 Liked 93 Times in 29 Posts	Re: Tear Down B/S ... must read A secondary stop/ idle screw allows you to adjust idle while positioning primary blades properly over transition slot.

08-29-2025, 07:04 PM	#15
Mark Yacavone Veteran Member Join Date: Mar 2002 Location: Miles From Nowhere Posts: 7,836 Likes: 2,930 Liked 5,148 Times in 1,965 Posts	Re: Tear Down B/S ... must read Question. How does a carb with four corners idling get approved for stock and super stock? __________________ "We are lucky we don't get as much Government as we pay for." Will Rogers

08-29-2025, 07:48 PM	#18
SS3860 Junior Member Join Date: Oct 2019 Posts: 97 Likes: 9 Liked 177 Times in 59 Posts	Re: Tear Down B/S ... must read Just talked to my Carb builder, no holes in secondary plates, could cause issue with vacuum secondary opening. SP carbs built QFT 780 Tom Flowers E/SA 3860

08-29-2025, 07:49 PM	#19
Ken Miele Live Reporter Join Date: Dec 2000 Posts: 4,935 Likes: 482 Liked 17,488 Times in 1,595 Posts	Re: Tear Down B/S ... must read I think you missed the most important part of the rule, and its the part you quoted. "Other modification prohibited". I don't agree that the booster falls under fuel passage and air bleeds rule. My booster was changed and it increased air flow dramatically because they were much smaller and it was approved. My point is, they let me change the booster and I get a gain in power, but two small holes with no power gain are suddenly grounds for being DQ'd. The rule makes no sense and should be changed.

08-29-2025, 07:55 PM	#20
larrylomascolo Member Join Date: Nov 2008 Location: Ontario,canada Posts: 442 Likes: 71 Liked 77 Times in 31 Posts	Re: Tear Down B/S ... must read Dan had this carb with the holes at a previous tear down and it was no issue carb passed.so now it does not pass tech..This is so not right .not a power gain .double standard this should be protested . . He and car were dialed in.this is so sad..probably wont see the Williams Bros. Stockers no more.... . SAD