Join Date: May 2005
Thanked 2 Times in 2 Posts
You can machine the back side of the piston all you want and the plunger will never bottom out. If you machine the open end of the plunger the spring will coil bind before the plunger bottoms out assuming you are refering to AAs. On an AD or AE injector you can take about .030" off the open end and still have a couple thousandths clearance on an AB you can take off about .040" and have about .001" clearance and on an AA you can take off about .140" off and have about .002" clearance. The AA, AD, and AE will bottom out the spring before it will bottom out the plunger. You don't want that spring to be coil binding constantly or it could break. You can take .017" off an AE, .009" off an AD, and .087" of an AA and that will leave you with .002" clearance for coil bind. These are all figures actually mesured so there may be a couple thousandths difference between one injector to the next. I'd probably recomend giving at least about .005" clearance for all those figures so that you don't run the risk of bottoming the plunger or binding the spring. Take as much as you are comfortable with off the closed end of the piston and you'll be good. I've never tried to test how thin you can make the back side of the piston before it will break so like I said just go as far as you dare. The AD pistons are VERY thick on the bottom but you will screw with the primary shot of the split shots by doing that. The ABs are much thinner but do still have some decent meat on them to take away but again will mess with the split shot end of it. The AAs are slightly thicker than the ABs.
'96 F-250 Extended Cab, GT'S injectors, GT'S intercooler install kit, custom turbo kit with a little HX40, Swamp's BIGEST oil.
466 on #2 only
739 with NČO
13.544 in 1/4 mi!
"If you think you can do a thing or think you can't do a thing, you're right." Henry Ford
Yeah I can keep up!:Thumbup: