Quote:
Originally Posted by Snake2998
On tracks where too much power is a problem why not fit a restriction plate upstream of the carb - won't affect low rev power but will limit open throttle power - nice quick at track mod and you can carry several sizes to try.
A simple solution is an Aluminium band fitted round the air filter with a suitable number of holes drilled in it - you can have several strips with differing hole patterns and sizes - would take seconds to change between runs till you get the right size for the conditions. This assumes your filter assembly can withstand some negative pressure but its much easier than changing mufflers and easy enough to build a filter setub to withstand negative pressure.
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Sounds like am idea worth trying it has a 1650 cfm Wilson throttle body so I could fit the restrictor between the throttle body and spacer. I will give it a try, I have one from years ago when the SCCA made 427's run one under the carb.