SBSR

How high of rpm can a stock 5.3 crank take in a non power adder application? What rods with Weisco Pistons for high rpm? What non ported cathedral port heads would work best?

boostit5.3

iTrader: (3)

im running a 1999 5.3 stock long block and i currently have shifts set at 6300 and i am working on getting it up to 6500. my cam is a little smaller than a .228 it pulls pretty hard my rev limit is 6900. if your worried about something coming apart at high rpm its gonna be the rod bolts i spray a 200 shot on this car and it loves it these stock bottom ends can take a beating..

boostit5.3

iTrader: (3)

and the stock heads flow pretty good, i plan on finding another set of 5.3 heads (ive seen them for $50) and doing a slight port job they should outflow the better castings. you can put the bigger ls1 valves in the truck heads also, which you can find for dirt cheap. i also plan on decking them slightly for a nice compression bump should help make power.

buddhaz06

iTrader: (8)

I'd say stock bottom with some good rod bolts, 243 heads, decent size cam around .600 lift and 23x duration and spin it to 7000ish. Basically what i did with my ls6 and spun to 7300

jaywill

iTrader: (5)

nice 2 hear ! i'm planning on a 150 shot on mine..what times have u ran