piston bowl designs

[ciamcoop]

So I rebuilt my engine and the pistons that came in the rebuild kit have a different shaped bowl than the stock pistons, more of an open design I guess is the best way to describe it. Maybe they're the marine type bowl??? I'm wondering if my injectors are the right spray pattern or if there are different patterns that work better with these pistons? I just bought 5x14s from dieselautopower for intercooled engine. The engine runs great and doesn't really haze at idle or anything, just wondering about things.

[cmann250]

To my understanding, the non-IC'd (marine) pistons have a wider bowl because they are intended to be used with a 155* spray angle injector. The IC'd injectors use a 145* spray angle. 155* injectors spraying on a piston with the small bowl is bad. The wider bowl is desireable so you can safely bump your timing and still hit the bowl

[ciamcoop]

That's what I figured. Kinda bummed now though, I could've spent $250 on injectors instead of $450. Ha

[oldestof11]

Add lots of timing!

[ciamcoop]

Like how much timing? To the head? I still want it to run down low, it's a driver and tow rig and I live on the left coast where the Communists have the speed limit at 55....

[BC847]

Like how much timing? To the head? I still want it to run down low, it's a driver and tow rig and I live on the left coast where the Communists have the speed limit at 55....

Get one of the M&H timing spacer thingys.