Need help finding rules.

[dartman]

Originally Posted by X-TECH MAN

They are basicly modified style motors with the limitation of the OEM stroke (+.013 allowed). No odd ball bore and stroke combos. Classes for one 4 barrel and one 2 barrel with a restrictor plate. Cubic inch to factory shipping weights. Very similar to the old modified production classes but no multi carb set ups.

i think it's +.015 (page 115 nhra rulebook 09 under engine)
page 36 ihra rulebook 09 under engine

i could be wrong

[X-TECH MAN]

Originally Posted by dartman

i think it's +.015 (page 115 nhra rulebook 09 under engine)
page 36 ihra rulebook 09 under engine

i could be wrong

Your correct. Most crank grinders go to + .013 to allow .002 safety margin for tear down Most racers and engine builders are used to saying plus .013 in general conversation. My bad.