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Originally Posted by Dieselwrencher
AC is on the list for my 72 as well. It definitely can be a PITA without it. How loud is this one? I need to put a timing light on mine and see how high it is. Mine is ultra combustion knock loud. The wife got tired of it and dosn't like to drive it. So I need to figure out why it's so loud, high timing I'm guessing, or stick a 12v in it.
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I would say it sounds like a 1st gen Cummins. I think a lot of that has to do with the 12V cam and the VE pump. One thing we did do was re-pop the injectors from the VP spec to the VE spec. I want to say they were the 50HP injectors from Scheid. That would be 50 over stock VP, I guess. Once we re-popped the injectors, it quieted down substantially.
On the timing... We tried turning the timing back down 2 teeth to where it would be in stock form, but it wouldn't even run. So we turned it up one tooth advanced, and it was pure gutless. So we bumped it back up to 2 teeth. This is definitely the sweet spot.
I may try to get a video of it running so you can hear it.