AA/SA @ Norwalk OH

[Steve Hagberg]

Jeff and David: Regarding the 3-bbl carb and intake, Chrysler completed the design modifications to the carb and 'short track' manifold and submitted them to NASCAR one week before the Firecracker 400 at Daytona in 1964. The combination was accepted by them and ran at that race. The manifold was the '043' magnesium version with the rear half of the plenum modified to accept the wide 3-bbl throttle blade. Les Norton runs this manifold on his car as it has been accepted by NHRA even though the carb has not been accepted! The interesting part of the story is that the Chrysler engineers spent a lot of time and money trying to get the 3-bbl to work, and even had to move the secondary boosters to correct the fuel distribution. Eventually they said it was worth 2% HP improvement, the same as they found in early testing with Hilborn fuel injection. The carb is a Holley model 3085A P/N 2536406 and used base plate gasket 2536411. One of these would be a rare find as it is not the same as the generic 3-bbl Holleys that were later sold over the counter. Anyway, it's not legal in stock, just an interesting story. By the way, I came about this information when a good friend let me look over an extensive collection of weekly engineering meeting minutes from late '63 to mid '64 by the group developing the A 864 engine program which included both the NASCAR engine and the Drag Race cross ram engine. Facinating reading. These guys were so far ahead of everyone else it was scary. Hollow stem valves, titanium retainers, a slew of light weight proposals including gun drilled cams, titanium wrist pins, Hilborns without conventional throttle blades. What we got was aluminum heads, oil and water pumps, mag intakes and more.

[X-TECH MAN]

Originally Posted by Steve Hagberg

Jeff and David: Regarding the 3-bbl carb and intake, Chrysler completed the design modifications to the carb and 'short track' manifold and submitted them to NASCAR one week before the Firecracker 400 at Daytona in 1964. The combination was accepted by them and ran at that race. The manifold was the '043' magnesium version with the rear half of the plenum modified to accept the wide 3-bbl throttle blade. Les Norton runs this manifold on his car as it has been accepted by NHRA even though the carb has not been accepted! The interesting part of the story is that the Chrysler engineers spent a lot of time and money trying to get the 3-bbl to work, and even had to move the secondary boosters to correct the fuel distribution. Eventually they said it was worth 2% HP improvement, the same as they found in early testing with Hilborn fuel injection. The carb is a Holley model 3085A P/N 2536406 and used base plate gasket 2536411. One of these would be a rare find as it is not the same as the generic 3-bbl Holleys that were later sold over the counter. Anyway, it's not legal in stock, just an interesting story. By the way, I came about this information when a good friend let me look over an extensive collection of weekly engineering meeting minutes from late '63 to mid '64 by the group developing the A 864 engine program which included both the NASCAR engine and the Drag Race cross ram engine. Facinating reading. These guys were so far ahead of everyone else it was scary. Hollow stem valves, titanium retainers, a slew of light weight proposals including gun drilled cams, titanium wrist pins, Hilborns without conventional throttle blades. What we got was aluminum heads, oil and water pumps, mag intakes and more.

Thank you Steve for the info on the "Bath Tub" intake and 3 barrel carb combo. It would have taken me days and maybe weeks to dig out the paper work and info on this combo as I have it packed away. I knew I wasnt to crazy...LOL .It was just a long time ago when we researched it for IHRA's AA/S class. In the end IHRA went with a 7 lb class break and reduced the HP rating on the Hemi X ram 2x4 system which would also allow the Ford T-Bolts and L-88 Corvettes with thier old HP ratings to compete together heads up. Dan Davorak had build one (a 64 X-ram Hemi model) but I dont know if he had the chance to run it before his surgery.

[Bob Pagano]

Item number: 250447430693 ebay Nascar carb, no intakes at this time but have seen a few in the last couple years even the wedge nascar intake, there were two just last month.

[David Barton]

Thanks for the interesting facts Steve.

The intake I have here at the shop is the exact same one you're talking about. Which intake did they have before they had the 3 bbl approved? Was it the same one without the 3 bbl modification?

[Myron Piatek]

Is this one of the Hemi Nascar single carb intakes being talked about, or a similar version with that has the carb "sunk" in the top half?

http://wwnboa.com/jpgs/wwnboamckinney2.jpg


....and I also found this!

http://www.thehemi.com/gallery.php?id=0003

[Larry Hill]

Dave I run a steel shaker with factory, "lead" trim ring and scoop inserts. I think this hood looks much cooler than the AAR hood. The air cleaner top is OEM steel and the intake is a real piece with the correct casting number the carbs are corect for a '71 six pac. Drop by at Norwalk and check it out for yourself.

A/SA now has 15 cars that will be four rounds of fun for two people.

[David Barton]

I think it would be great to run A/SA with so many cars but I don't want to get hit with HP. And how many cars lose class on purpose just to protect their combo? What kind of racing is that? At least in AA you can run balls out. At least for now anyway.

[RJ]

Originally Posted by David Barton

Good thing I didn't jump. What is RJ talking about?

I was wondering about the AAR hood I saw on the Larry Hill car at one time, until now I didn't know it was considered a replacement for the shaker on 4 bbl. combos. An old friend of my dad's runs a 71 340 Barracuda stock with a shaker, anyone know if the AAR hood works better?

[FLOYD RUSSO JR]

hey yall i guess yall dont think the LS1 are a chev 427 has a chance .......

[Frank Bialas]

Originally Posted by Evan Smith

It was also unfair that the 440x6 in the B-Body got hit to the moon, when the A-body with a similar chassis got nothing (had the A-Body been included it could have brought the entire average down). Moreover, NHRA hit the 350 Chevy based on runs make by a Camaro and a Corvette? There is clearly little logic applied at times, and this was brought to the attention of high-ranking NHRA officials, albeit with zero response.

I am certainly not one to bash NHRA because I feel that most of the guys sportsman racers deal with are good people, but it's amazing to me that we could make a few simple changes to "enhance" the sport, yet no one wants to act and make such improvements.

Evan

Hey Evan, I think you are adjusting quite well to that Florida climate, but your comparison of the 6pak in the B-body & A-body is a typo! The B & E bodies are very similar and you are right about the average, and it's only 12 hp, maybe roughly 120 lbs, solid tenth!!!