Originally Posted by
morph
I didn't think cossies needed so much work to get that sort of power?
so i take it all those mags featured cossies that only had a chip were no way close to 300bhp then?
T3 will do around 300-320, Twellsies made 326bhp/ 356lb/ft on Martins Roller with the gunship..
But generally folks change to a T34 for going 330+, again different housings, injectors to suit your level of tune.