I have a turbo ls/vtec but I got the turbonetics turbo from someone and they don't know what size turbo it is. I think it's a t4 but I'm not sure. the turbo is not completly spooled till about 4000 rpm's. I want to be spooled up at like 2500-3000 rpm's. what size turbo should I get that can give me good power but still spool fast?