The nitrous cars got the day off in Rockingham on Sunday. None of the nine bottle cars (amongst 35 entries) could crack the record 6.106 bubble. Defending World Champion Mike Castellana was the first alternate with a 6.115.
The IHRA’s Pro Modified division was originally built on the diversity of nitrous versus supercharged combination. After only seven years of existence (1997), one combination totally dominated the class to the tune of nine exclusive events in one season.
Scotty Cannon represented the only driver to qualify with a supercharged combination during that season and did it during the first event. He converted to a nitrous car and for the remaining nine events the blower cars were shut out.
IHRA rule makers made an adjustment to the blown combination and legalized the high helix supercharger. The Hemi allowance came shortly thereafter.
A solid source tells Torco’s CompetitionPlus.com the rules will be adjusted this weekend with a combination that should slow the blower cars by almost .15. Meanwhile we hear the nitrous cars will gain a cubic inch increase.
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