is there really no replacement for displacement?...

I ran a 11.546 at 113.31 in Eureka last weekend,ALL MOTOR.12.5 compression with the same head gasket I put in over 80 runs ago.Will bee running this comming weekend at the mopar race in Sacremento.Trying to lower my record in the B/gas class.2350lbs to 2700 lbs.My car weighs 2380 with me in it.NOT a street car.Guzzi Mark