craigcounty

I am wanting to know what the biggest duration and lift I can use with what I have preferably without fly cutting. looking for some advice .I will start out with the parts I have and want to use .ported ls1 heads 2.02 intake valves and 1.65 exhaust huge intake runners flow 319 cfm at .500 lift with isky .650 lift springs,yella Terra 1.80 rockers ,bone stock 5.7 bottom end ,long tubes,3" orx pipe true duals.and I plan on getting ls6 manifold or better,melling oil pump,chromoly pushrods,new timing chain,around 3000 stall,gears and tune

craigcounty

Well i talked to Jon at Texas speed today and told him I was interested in the 233/239 and asked him if he thought there would be any p to v issues with above listed heads milled 5 thousands and 1.80 roller rockers.he told me they had done this same combo before with heads milled even further and had no issues and feels I would have no issues running this setup .so unless someone chimes in and tells me they know it won't work I am going to order the tsp 233/239 duration .595/.603 lift and with my rockers it would be .630 intake lift and around .638 intake lift