Well I'll talk it out with Tom sometime this week then. The springs should be fine up to .550" or .560" cam lift with that bind height @ 1.13" so I should have room to upgrade the cam lift and duration, but I only want to do the machine work once so I need these valves sized right the first time.
My horsepower goal is in the 400-600hp range. Hopefully 350-400 @ 15psi without alcohol and into the 500s with alcohol. I'm not sure if that's hopeful or not but it seems to be a reasonable goal with... -higher compression (9.0:1) @ 15psi -mild porting (part of tom's head work I believe) -lump ports -deburred combustion chambers (lessen detonation) -port matching -holley double pumper 600cfm 4bbl (with the hangar 18 blow through mod) -MSD BTM or megasquirt timing control -alcohol injection -intercooled -little larger ball bearing name brand turbo like this Garrett GTX3582R which is a 63mm T3 turbine turbo with similar A/R ratios and a recommended hp range of 450-750. EDIT: This actually might be a china turbo ripoff but this turbo nonetheless http://www.ebay.com/itm/GTX3582R-Turbo-c...f6d64e8&vxp=mtr
Last edited by snowman4839; 07/20/1403:16 PM.
69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.
