I have a bunch of good injectors and a bunch of gunked up ones.

next week I'll be building an injector tester, and I'll run a bit of diesel thru and take pics, and I'll pick the less good ones (not a completely fouled one) and run some diesel purge thru, and record the difference with the camera, and post.

how bout that? I've never done a diesel purge, so have no bias one way or another. I'm willing to bet it's doing at least as much for the IP as the injectors.
I don't suppose dieselgiant would like to send me some free of charge so I'm not biased? wishful thinking.

seafoam vs diesel purge: smell and compare. the average human nose is pretty good at that, especially the mechanic's.

I've got a buddy at Chemtool www.chemtool.com (makes lots ofchemical products for Caterpillar among others. top notch place. ) I'll ask him. no bias

I'll be doing a diesel purge on my 85 f250 as well. will report on that too.
and on the junkyard engine I'm going to be putting in a new to me 85 SD

will report back

karl