WOW! That's a little more than I expected. That'll take her up to 423 cubic inches. Might as well just go ahead and tear it completely down since I will be into it that far. That's not cutting too much off huh? Seems like taking that much off and squirting that much fuel in there is going to make for a lot of heat on the surface of the pistons. Oh well, that's what I get for doing Tim the Tool Man Taylor's More Power thing. Thanks for all the info!

 

I believe one guy took .045 off his pistons. The guy who went .030 is also running a moose pump and and near 20psi.

 

I'll take a deeper look into how much I want to carve off of the pistons. If I think there is enough meat there to go .035-.040 inch, I might. I wonder if some of the aftermarket guys have pistons for these critters like Badger or something...I doubt it, but I'll check into it. Since I have that other turbo on the shelf, (and it's screaming for me to use it), I know I will have the volume to run whatever boost pressure my little old heart desires. I just don't want to scatter the bottom end all over the highway. I guess that's where taking my leaded foot out of it and making two trips instead of one comes into play. Thanks for all the help!

 

Another thing to realize is that lowering the compression will affect cold starting. It might not be by much, but you will likely notice it. The gentleman who removed .045 uses his truck to plow out east and says it still always starts, it just takes a bit longer than it used to.

 

Did your friend have any problems with the top ring land cracking or anything? Did he have the whole top milled off or did he form a "dish" in the top so it would leave some meat up near the top ring groove? Or do you know? Thanks again, but starting isn't an issue. I live in the Pacific Northwest, we swim more than we freeze. Besides, I run 50/50 stove oil/Diesel fuel.

 

on the left side of pump the a triangle shape door. there a couple sites that tell you exactly
how . too much fuel wont give you power just smoke. junk yard ! pumps or 25- 50 and injector are a dollar sometimes more. take yours out and go get 8 more then go to a diesel pump shop have them checked cost a dollar a piece take best eight reinstall. be careful theres a o ring on tip and a little brass washer.if the runs smooth and you your getting reasonable power its prob ok the reason there aftermarket turbos is that the asp 6.9 wasnt
satisfactry to some people . its a great truck with a great engine. new rebuilt pumps 250 and new injectors 16. on a powerstroke its 2800 and 450. lov your truck

 

He's got around 50k miles and no problems so far.