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Message: [QUOTE="Powerstroke Cowboy, post: 357109, member: 610"] Then why not do 600/600 ???? And then twin modded HPOP.. Matt@Gearhead's Cam>>Stage 2 Sled Cam: - $600.00 This cam is identical to the stage 2 but has a different exhaust lobe for the pullers running an 88mm exducer turbine. This cam drives the turbine harder at lower rpms thus preventing the charger from snuffing due to the rpm dropping when the pan hits at the end of the track. This is THE cam to have for well setup 7.3 pulling trucks. Custom valve springs with a 400-430 lb/inch rate are required and 150 lbs of seat pressure is recommended as well as being able to handle .500” lift. A .030 or more exhaust valve relief in the piston crown is also required. Contact us for a valve spring recommendation. Upgraded pushrods are required.. Mount a Icebox (as a intercooler) for the compressed air (if it is allowed) Have a GTX4508R turbo, OR a equivalant. Then just have a ring made to neck it down to 2.6 inch 2.8" or 3.0" What ever works at the time.. But If you are not going to tear into the engine.. then the stage2 sled cam would not work.. BUT this would...>>Stage 1 Cam: - $525.00 This is the cam International should have put in this engine for the Powerstroke truck application. This cam is a perfect stock replacement cam that has performance and towing benefits by lowering smoke output and EGTs. With a slightly different centerline and lobe aggressiveness over stock, this cam does everything the stock cam does only better under all conditions. This cam also prevents reversion with high drive pressures common to typical single street turbo setups. Stock heads with upgraded valve springs are the minimum requirement (Comp Cams 910 shimmed to 125lbs on the seat), but lightly ported heads really complement this cam. No piston modifications are required and valve lift with stock rockers is .450” Upgraded pushrods are required because of the added spring pressure. Then just do all the needed supporting mods to make it work together!! And have fun!!! Head work would be good!!! Some good porting could help spool the turbo better and get more air quicker... [/QUOTE]