how are EGT's with the more holes? I could afford a little loss of top end, it's still a work truck, I'm trying to clean up haze and improve spool a little at this point..
I actually found egt’s were higher....maybe because I didn’t experiment with changing pump timing but I’m sure it was due to the fuel being a bit slower getting into the cylinders seeing as the holes are smaller, so hence the flame front/timing changed.
lol. No one can afford to loose a little top end. Problem is you also loose midrange too with more holes. Bottom is slightly better but again most likely due to the change in timing of slower fueling.
My findings were power went down drastically & smokier from mid to high rpm. Not anywhere near worth the slightly & I say slightly cleaner bottom end. Leave the more hole inj’s for the higher pressure inj pumps that can take advantage of them.
If you are hazing, it’s due to a poor quality nozzle, worn out nozzle or wrong spray angle. The wider the spray angle the better the turbo spool-up but only to a certain point. You would benefit from say a 5x13 @ 148deg SAC than a same size 5x13 @ 145deg SAC or VCO for power & spool-up, without any noticeable haze difference.
Have you noticed that all the manufactures are now running SAC style inj’s in all the newer engines. There is a reason for that, as pointed out.
See what I’m saying.
