I've got to get new pistons (and a replacement block
).
- I have what I think is a well flowing head (195/220) that includes swirl-inducing reliefs.
I've run the head for a good while now with the stock/OEM '93 pistons (narrow/deep bowl?) and the associated 145* nozzle spray angle.
I'm pulling things apart to replace the short-block. Removing the head reveals apparent uniformity of the soot/carbon patterns of each cylinder . .
Typical of six . . .
I'm assuming this pattern at the nozzle is a result of the swirl (typical) . . .
This is typical of the pistons . . .
Clearly, there's some fuel impingement going on . . .
The engine ran strong and clean.
If I'm not mistaken, the stock/OEM '93 Dodge/Cummins run this piston (someone correct me if I'm wrong, please).
I think I might benefit from running this piston, if only to lessen the impingement . .
I think it'd be best to raise the C/R a little to offset those reliefs in the head (I've yet to CC them
) That piston I'm looking at won't help that way.
Thoughts? Suggestions? Rude remarks?