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i have a question i am wondering what the max boost that the factory headgaskets or aftermarket head gaskets will handle with just head studs. engine is a 96 7.3di all mods are in sig, at what pressure would i need to o ring the heads, have read alot on this and dont want to fire ring have heard alot of issues with sealing when cold, and i like the idea of o-ring cause it just seals the factory fire ring in the head gasket tighter. the reason i am asking is i am thinking of building a compound turbo setup for my truck cause my current turbo is maxed out when running up to the 3800rpm mark and running around 40psi boost, i have set down and done a rough mapping on the compressor map and i am way off in the choke side of the map at the 3800 mark but at same boost and a lower rpm say 3000 i am starting to get on the border of the choke side, so i want to add a low pressure turbo to feed this so i am able to build power all the way to red line.
1973 f-250 highboy, 96 powerstroke engine, 5spd, td 6 position chip, 99intercooler, airdog ondemand 2, 3 dp to 4inch stack bw s300sx3 turbo, home made t4 uppipe and flange, sd intake plenum, valair clutch, t500 hpop, sureflow 230cc/100% future 74 crew cab long bed on 88-97 frame. wheeling rig 1987 ford ranger, 88 ford idi, c6 trans, twin stick np205, 2.5ton rockwell front and rear, pinion brakes, hydralic steering, internal 10point cage, dove tail front and rear
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