Injectror nozzle protrusion

[Cummin_un_glued]

24v cummins

Whats everyones thoughts on injector protrusion and its effects on timing / tuning.

 

[cumminspa75]

I'm no guru but my thinking is that more injector protrusion would be harder to tune and be less forgiving with timing. Also I would think piston bowl design and modifications would need to be considered in the case of more protrusion. Just my 0.2. Interested in others responses.

 

[Cummin_un_glued]

SO vp bowl opened up to 64mm

 

[Cummin_un_glued]

For what its worth from 32* to 36* is 0.100" of piston travel, that pretty much tells me what I wanted to know. If anyone has any input on timing i'd like to hear it.

 

[blackstacks]

.10488". It's a game won by only thousandths, and secrets never told..

 

[motorwood]

I pulled my head off the other day and all 6 injectors had hit the top of the dome at one time, so there can be too much protrusion. I think it was the combination of .5mm sealing washers, and 1st gen non-intercooled pistons, oh and lots of rpm and heat.

 

[Cummin_un_glued]

I milled the cones down .105" on my pistons for that very reason