CLASS RACER wall of SHAME ....

[Billy Nees]

Originally Posted by Mark Yacavone

Gregg, Have you noticed that for 10 years, they've only wanted to check venturi and throttle plate bore on carbs? Apparently they are just now, looking at them more closely. Okay then,,Check them all!

and if this is a change in NHRA Tech's policy towards carbs then there should ,at least, be a notice of it! BECAUSE over the last couple of years I have been told by more than one Tech that NHRA's "new policy" is ONLY checking venturi size and throttle bore size. Are we checking boosters again? If we are then how does this affect the "replacement Holleys? Do they have to use an OEM Annular Discharge booster or can they continue to use a Down-leg booster? How about throttle shafts and blades? A little more of a heads-up here guys. I don't like surprises! And I REALLY don't like ambushes!

[Terry Drinkwater]

Oh boy.........

[SSDiv6]

Originally Posted by Billy Nees

and if this is a change in NHRA Tech's policy towards carbs then there should ,at least, be a notice of it! BECAUSE over the last couple of years I have been told by more than one Tech that NHRA's "new policy" is ONLY checking venturi size and throttle bore size. Are we checking boosters again? If we are then how does this affect the "replacement Holleys? Do they have to use an OEM Annular Discharge booster or can they continue to use a Down-leg booster? How about throttle shafts and blades? A little more of a heads-up here guys. I don't like surprises! And I REALLY don't like ambushes!

Agree. Policies have been inconsistent and clear as mud.

Let's go back some years ago when NHRA started bouncing people with Quadrajets that appeared to be polished or did not have any casting flashing. Still remember showing NHRA Tech, a brand new Quadrajet, still sealed in the factory wrapper. I just had opened the box and they unwrapped it themselves, when they looked at the venturis, there were no flaws and they looked perfect. I asked them if the carburetor would be illegal and they were perplexed that a new carburetor would look that way.

All I said was, "how about if the manufacturer changed their process for cleaning castings with a new method and this happens to be the result? Is it the racers fault? How about developing some criteria and share what is acceptable and what is not? All they did was to take some pictures of the carburetor and no answer to the issue.

It also appears that the casting finish inspections by NHRA on carburetors stopped when all the newly approved replacement Edelbrock and QFT carburetors were made available.

[Jon Sarrett]

Start with something incredibly simple, a cubic inch tester. They already carry one in the tech trailer. Wouldn't take but a few minutes to pump an engine up. If something looks fishy, keep going from there.

[rognelson777]

Originally Posted by Jon Sarrett

Start with something incredibly simple, a cubic inch tester. They already carry one in the tech trailer. Wouldn't take but a few minutes to pump an engine up. If something looks fishy, keep going from there.

as long as you are not running dual overhead cams it is easy to pump

[rognelson777]

so being just a fan of class racing, i see a lot of comments about boosters and carb stuff. what are horsepower gains that can be found in carb details..

[GTX JOHN]

Originally Posted by rognelson777

so being just a fan of class racing, i see a lot of comments about boosters and carb stuff. what are horsepower gains that can be found in carb details..

There is Plenty!!!!

Especially on Lower Class cars that are Carb CFM limited.

I know more BUT: Better not say any more!

I have made back to back testing.

[Adger Smith]

https://blp.com/cart/index.php?main_...Path=65_87_225

[Billy Nees]

Originally Posted by GTX JOHN

There is Plenty!!!!

Especially on Lower Class cars that are Carb CFM limited.

I know more BUT: Better not say any more!

I have made back to back testing.

I think, for once, I'll just keep my mouth shut.

[FireSale]

Originally Posted by rognelson777

so being just a fan of class racing, i see a lot of comments about boosters and carb stuff. what are horsepower gains that can be found in carb details..

I bracket race so I've been keeping out of this, but I will tell you that a 1/4 turn of a screw on a carb is an eat or be eaten decision on the track. I can't believe how people learn to fine tune these darn things like they do let alone "cheat" on the dozen or so variables that are in there to "vari" with. Fuel supply to the motor is so critical that not enough at high rpm will kill the engine.