rage_blue

So I'm finally getting to play with a 12 valve. First one I get to tinker with and its a complete engine build. Someone else dismantled it and never marked anything. I've done a bit of searching and found out how to hit stock timming on the p pump using the timming pins. But this engine is going to be pushing some power, the pistons are ceramic coated and I think hes starting with 150hp injectors, aftermarket turbo is going on, I think a 64mm BD like the junk i traded to tate lol. I've found peirs table of plunger lift timming, but The pump and engine have no numbers left on the plates. So whats the best way to set the timming on this pump, and how much timming should he be running? I've got the dial guage set up from snap on comeing. I also already have a pulse generator to check the timming, but the customer is installing the engine him self so that doesn't help. oh yea this engine is being installed into a 2005ish ford superduty.

Tate

Take the DV holder off the #1 barrel, pull the DV and pressure valve holder out. If you have a V-notch plunger, its a 215 pump, use the appropriate chart. If its a flat top, bring it up so it just closes off the spill ports (make sure you are turning CW). Now, without the pump turning, install the dial and take note of where its at. Turn the pump CCW until the plunger is at BDC and the dial has stopped moving. See how much you have gone back. This is your Lift to Port Closure (LPC). To figure your degrees to lift, multiply your desired timing setting by 0.2 and add the LPC. 160/175 pumps should have an LPC in the 3.2mm range, 180 pumps in the 1.8mm range, 215 in the 2.3mm range.

Conversely, you can measure the lift when the pump has been pinned. Most pumps are pinned in the 11-13 degree range, so you can compare the lift then to the chart as well.

Depends what he's doing with the truck to decide where the timing is going. If you've got a secure headgasket, 18-20 would be a good place to start. But its gonna take some tuning, and thats going to be up to him to do it.

rage_blue

I figured tate would reply lol. Thanks that helps a lot . I don't think he'll tinker with it on his own. I may donate some time just so I can learn and play a little.