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Thanks! I’ll see if I can track him down.

Thanks for your reply. I believe I now understand how it works.

Thanks Mike for your reply. So do you think it will be OK to re-plumb the CDR hose to upstream from the supercharger, downstream from the filter?

No issues related to the strength of a P400. It’s like a 6.5 diesel on steroids. Developed by GEP to power the new upfit HMMWVs but then GEP lost the military contract. So a few of these engines were released to the public. I was fortunate to have acquired one a couple years ago. Forged...

I will update my rebuild thread in the CUCV Hotrodding forum pertaining to the possible supercharger. This thread relates to the function of the CDR valve.

Thanks for your reply. I’m still struggling to understand exactly what the valve is supposed to do. Is it to keep positive pressure in the crankcase or negative? Is the valve set at 5 LBS? is the valve similar to a thermostat but opens upon pressure instead of temperature? So the negative...

I am just now exchanging emails with the fellow at Bullet in Austrailia. I have concluded that the CDR valve will have to be removed in its entirety. I have no problem with this, just need to know what to do about crankcase venting. Don't need vacuum anymore, changing the TH400 to 700R4...

I am considering supercharging my new P400 engine and was wondering what would happen when I completely remove my CDR valce and piping. In thinking about this, I began pondering what happens to the valve when adding a turbo or supercharger, as the additional boost/intake pressure would...