max boost on a 4 bolt head.
03-01-2015, 09:13 PM
#41
TECH Fanatic
Watch the front of the car here. This is an untouched ls1 130k miles with only the cam swap stuff. Pump gas/meth 16psi 12deg timing s475 turbo. On a cold cooling system we took overflow tube off to see when heads where lifting. 6000rpm on 16psi roughly 775rwhp. That's stock bolts that came in engine. Heads always sealed back up somehow only pushed water above 6000rpm even at 23psi which I have no numbers for. With good fuel and tune I think big numbers are possible on 4 bolts. My next combo will be trying for 1200+rw on a 4 bolt style.
