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Motor size is 408cu. I have a 0.5 gear pump my flow chart is at work. 33nozzles. And my pill size vary with the weather and altitude as do my high speed pressures with my pill changes. I run it around 80 to 85 psi normally. I run normally at my home track a 86 pill.

There is more than one tune-up to give the same fuel flow. High pressure with small nozzles, and lower pressure with larger nozzles. The reason I think the 33 nozzles might be fine is because that is what I ran with methanol (26 with E85). CID, rpm, and vol. eff need to be considered, but for comparison mine is a 511 CID, 5500-7000 rpm, 0-1/2 vane pump, 4.1" toilet, 98 pill. My high speed bypass is set to crack at 77psi, so it likely goes higher but I don't have a pressure measurement going down the track. I set it with A/F from a wideband
recorded data and time slip data.



Jim, this is what Spud Miller from fuel injection enterprises set me up with..Had him flow everything before I started so my setup would be close. I have tuned it from his initial setup, but his tuneups have been very close. He likes to run the smaller nozzles at a higher pressure so it has good atomization sp.? I have never tried any bigger nozzles yet...