Originally Posted by Jim Lane

Just a few questions about pump timing for my curiosity.
How much do you advance the pump? I understand it is moving 1/8" but about how many degrees is it?

I'm not sure if anyone's done the math, but generally the bump is said to be worth 2-3 degrees

Is there any (easy) way to check what the timing is before it is moved?

there should be a hash mark on the pump and on the timing case from the factory. That indicates the stock timing referenced on the data plate on the timing cover. As long as your pump and timing case are original, it's reasonable to assume that you're at 1.2mm of plunger lift (I think that's the intercooled setting) That's about as easy as it gets. To know for absolute sure, you'd have to find true TDC and get the plunger adapter for your dial indicator to see where you're at.

All of the times we remove and reinstall our pumps, how close to stock timing do we really get when we get them in? My index mark is not real precision looking.

I'd say within 1/2 a degree, which is really close enough for these old girls (imo). My truck has tolerated an absurd amount of timing with no ill-effects...yet. The 1/8'' bump is very safe, especially for your uses Jim.

What are the effects this mod will do to our engines as far as mechanical noise?

The engine will sound more like a 24v. The 1/8'' bump doesn't make a huge difference in sound inside the cab, though, and that's on my poorboy model with rubber floor.

Also after the fun wears off how will this effect out mileage?

You'll pick up anywhere from .5-2mpg, depending on the bump.

Should the fuel lines be loosened and retightened to release the stress from torquing the pump?

It's not a bad idea to remove the overflow banjo and the AFC boost line. They're the most likely to crack when pushing the pump around.

Thanks Jim

Originally Posted by Jim Lane

What do you mean? my 6.2 was healthy sounding with Banks exhaust.
How about a 6.2 starting on WD-40?

Does this affect the starting characteristics of the engine?
Thanks Jim

Originally Posted by DODGE 92

i mean when your pumps start to sound loud like the same sound the 6.2 pump sounded like

Originally Posted by G1625S

Generally, the 1/8'' bump doesn't noticably affect starting...especially in warmer weather.

Originally Posted by Boatnik

The last two moves (about a 1/16th inch each) I didn't see much change in EGT's, smoke or power.