Tear Down B/S ... must read

Ken Miele · 08-29-2025, 12:06 PM

Hey guys, a post I did not want to make. Dan Williams in his B/S 69 Nova was DQ'd from the race for a carb infraction, having two holes drilled in the secondary plates. The holes are drilled for idle quality, but NHRA says that is illegal.

I thought that rule was gone years ago. With Quick Fuel carbs be legal along with swapping out boosters on the older Holley carbs. I was shocked Dan was DQ'd. And for anyone to say booster swaps are not allowed, you would be wrong. I replaced the boosters on my Mustang when I ran the 735 Holley and they were deemed legal by NHRA.

I would think a booster swap would be a performance gain, not two small holes in the secondary throttle plates... go figure.

The real kicker hear is Dan has been torn down many times, the last time was 2019 here at Indy with the same carb and NHRA had no issues with it. These guys come all the way here from England to support NHRA and get bounced for a rule that should have been taken off the books years ago.

Its really sad that rules are not updated for consistency. Aftermarket carbs, other mods to the carbs are okay, but not to small holes that give no performance gain.

I applaud NHRA for tear down, there is four stockers with the heads coming off and dozens of Stock and Super Stockers getting Carbs and throttle bodies checked along with fuel injected cars have to give access to there ecu data... but come on, getting bounced for two small holes in the carbs, so disappointing.

Dave Casey · 08-29-2025, 12:11 PM

I know of one super stock racer that was dq'd for the exact same thing a year or 2 ago

ron mattson · 08-29-2025, 12:51 PM

My guess is that it is because the holes are on the ?secondary? side, I was told
In Chicago in 2018 no 4 corner idle even though my
Quick fuel carb came with it NHRA approved and all. I had to JB weld the secondary
Adjustment screws so they were non adjustable.

MR DERBY CITY · 08-29-2025, 01:04 PM

Bummer for sure. Love the brothers from England !!!

Steve Stasko · 08-29-2025, 01:16 PM

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

James Perrone · 08-29-2025, 02:55 PM

Depends on who?s looking at things

Mark Lewis · 08-29-2025, 03:09 PM

Apparently now you can decide if you want to teardown or not

JP1738 · 08-29-2025, 03:31 PM

Quote:

Originally Posted by Mark Lewis

Apparently now you can decide if you want to teardown or not

How's that?!

GTS340 · 08-29-2025, 04:11 PM

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

Paul H

GUMP · 08-29-2025, 04:54 PM

Quote:

Originally Posted by GTS340

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

If a guy was trying to manage his AHFS, could he disconnect the secondaries and use this to control ET?

08-29-2025, 12:06 PM	#1
Ken Miele Live Reporter Join Date: Dec 2000 Posts: 4,918 Likes: 478 Liked 17,358 Times in 1,578 Posts	Tear Down B/S ... must read Hey guys, a post I did not want to make. Dan Williams in his B/S 69 Nova was DQ'd from the race for a carb infraction, having two holes drilled in the secondary plates. The holes are drilled for idle quality, but NHRA says that is illegal. I thought that rule was gone years ago. With Quick Fuel carbs be legal along with swapping out boosters on the older Holley carbs. I was shocked Dan was DQ'd. And for anyone to say booster swaps are not allowed, you would be wrong. I replaced the boosters on my Mustang when I ran the 735 Holley and they were deemed legal by NHRA. I would think a booster swap would be a performance gain, not two small holes in the secondary throttle plates... go figure. The real kicker hear is Dan has been torn down many times, the last time was 2019 here at Indy with the same carb and NHRA had no issues with it. These guys come all the way here from England to support NHRA and get bounced for a rule that should have been taken off the books years ago. Its really sad that rules are not updated for consistency. Aftermarket carbs, other mods to the carbs are okay, but not to small holes that give no performance gain. I applaud NHRA for tear down, there is four stockers with the heads coming off and dozens of Stock and Super Stockers getting Carbs and throttle bodies checked along with fuel injected cars have to give access to there ecu data... but come on, getting bounced for two small holes in the carbs, so disappointing.

08-29-2025, 12:11 PM	#2
Dave Casey VIP Member Join Date: Dec 2002 Location: Hampden, MA Posts: 1,205 Likes: 233 Liked 804 Times in 168 Posts	Re: Tear Down B/S ... must read I know of one super stock racer that was dq'd for the exact same thing a year or 2 ago __________________ Dave Casey 1330 STK

08-29-2025, 12:51 PM	#3
ron mattson Member Join Date: Nov 2005 Location: cloquet mn Posts: 468 Likes: 17 Liked 69 Times in 32 Posts	Re: Tear Down B/S ... must read My guess is that it is because the holes are on the ?secondary? side, I was told In Chicago in 2018 no 4 corner idle even though my Quick fuel carb came with it NHRA approved and all. I had to JB weld the secondary Adjustment screws so they were non adjustable. __________________ Ron Mattson 5015 STK

08-29-2025, 01:04 PM	#4
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,660 Likes: 1,094 Liked 8,206 Times in 1,536 Posts	Re: Tear Down B/S ... must read Bummer for sure. Love the brothers from England !!!

08-29-2025, 01:16 PM	#5
Steve Stasko Member Join Date: Jul 2011 Location: Western PA Posts: 459 Likes: 13 Liked 287 Times in 146 Posts	Re: Tear Down B/S ... must read I don't understand this post. The rulebook clearly states the holes may be drilled in the PRIMARY plates, other modifications prohibited. Attached Thumbnails

08-29-2025, 02:55 PM	#6
James Perrone VIP Member Join Date: Feb 2004 Location: LONG ISLAND N.Y. Posts: 1,695 Likes: 3,436 Liked 1,860 Times in 434 Posts	Re: Tear Down B/S ... must read Depends on who?s looking at things __________________ james perrone 1290 STK

08-29-2025, 03:09 PM	#7
Mark Lewis Member Join Date: Apr 2006 Posts: 352 Likes: 64 Liked 209 Times in 46 Posts	Re: Tear Down B/S ... must read Apparently now you can decide if you want to teardown or not

08-29-2025, 04:11 PM	#9
GTS340 Senior Member Join Date: Feb 2017 Location: Las Vegas, Nv Posts: 876 Likes: 283 Liked 1,354 Times in 413 Posts	Re: Tear Down B/S ... must read Not much idling going on with the secondaries.Not sure why you would do so. Paul H