CLASS RACER FORUM - View Single Post - 1957 283/270hp dual quads drag testing on a 350

wheezer · 09-03-2009, 08:53 AM

I'm drag testing an original '57 dual quad set up with the WCFB carbs.There seems to be a problem with how to deal with the secondary air valves. These are those seconday air-flappers with a counter weight outside the carb body. How did the class racers in the old days make these things run hard for the complete quarter mile? In testing the car launches normal (3700lb '57chev, 355cid, T400) with1.8 sec 60ft then about 100ft out those pesky air valves can't figure out what they are supposed to be doing. Once in high gear it runs great(high 12.8's at 105mph). Perhaps some old timer will read this and offer some tips. Thanks,Tom, Dallas/FtWorth

09-03-2009, 08:53 AM	#1
wheezer Junior Member Join Date: Sep 2009 Location: Dallas/FtWorth Posts: 13 Likes: 0 Liked 0 Times in 0 Posts	1957 283/270hp dual quads drag testing on a 350 I'm drag testing an original '57 dual quad set up with the WCFB carbs.There seems to be a problem with how to deal with the secondary air valves. These are those seconday air-flappers with a counter weight outside the carb body. How did the class racers in the old days make these things run hard for the complete quarter mile? In testing the car launches normal (3700lb '57chev, 355cid, T400) with1.8 sec 60ft then about 100ft out those pesky air valves can't figure out what they are supposed to be doing. Once in high gear it runs great(high 12.8's at 105mph). Perhaps some old timer will read this and offer some tips. Thanks,Tom, Dallas/FtWorth