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Originally Posted by Pushit2.0
78mm is the class limit. NDRA has more open rules for pro 4 then NHRA. So I thought the 74mm was the limit and you could only run one poweradder with methonal. Now I can try some nawz with my high boost on meth, it will be fun.
~John
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There are always changing the rules to try to keep the cars closer. They made Rau go down to a 78mm from an 80mm in the middle of season, to try to slow his car down.
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