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I have been working on swapping on roller rockers and just havent devoted time to it. Making some money has gotten in the way of r&d.
They are 1.5 ratio.
Mahle makes replacement pistons that are already shorter tops to lower compression.Mahle was the OEM for the pistons, best ones available.
PSD rods are not the same.
Here is the list of what I have done to my engine
Sleeved 2 bad holes and bored 20 over, coated low comp pistons,rods bushed and bored about 8 thou shorter to lower comp more, coated bearings ,rockers, pivots. Torque cam. bronze PRP valve guides, the best there is IMO, inconel exhaust valves, new springs are mandatory. Polished ports,balanced bottom end.Block decked 4 thou, heads 5. ARP studs for the heads.
New melling oil pump. NOT recommended. Check out the original, if it is in spec, re use it. Polished and shimmed the oil relief, they get sticky after many miles.
I had to remachine mine to get the clearances in spec, the melling rep said they cant check them all, nice attitude. Cermakromed the exhaust parts to keep in the heat for the turbo.
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91 F350 crew cab 4x4 7.3 ats and intercooled with cut down 2000 ps cooler, bigger turbo comp,head studs, torque cam, coated rockers , balanced. very good power.
pyro,boost and all stock guages ignored with mechanical real ones
Fugitive sandrail. type 4 2840 turbo fi, lots of fun
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Last edited by typefour; 09-30-2009 at 11:44 PM.
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