1957 283/270hp dual quads drag testing on a 350

[Ed Wright]

Tom may be onto something. I never used those on a larger engine. After we were forced to go to SS (when they killed off Stock) the bigger cam caused low enough vacuum that at high elevations (even at Amarrillo) they would not lean out on the return road, and at idle. I removed the spring and set the lever under the metering rod "tree" to raies them all the way at WOT, no spring needed. It drove so well that way I never put the springs back in. Might try that to verify you not sucking the pistons and rods back down. We also had to wedge the carbs foward after going to SS (no more 7" tires) to keep the rear jets covered up on the launch. 4GCs like wedges too.