Originally Posted by Just Dave
Most of the pro-mod cars actually went away from using a push system not long after they started using them. The problem is as the car gets near the top end, the RPM and load are so high that going to a rich mixture keeps the motor alive. The push system is great for keeping a solid air/fuel ratio, but it ends up being a bit lean for the motor.
They might have gone away with them back then but they are kind of making a comeback in some circles. Mainly due to tha fact that tuning capabilities are much greater concerning just what you stated.
Going rch at the top of the track was always a bandaid IMO for poor overall tuning.
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