scsmith
Well Known Member
I've been flying with an IO-360-A1A straight out of the box, running LOP with a GAMI spread of about 0.3 gph. It has been fine, but looking at my data, I wondered if I could do better. Three of the four cylinders peak at essentially the same time, and one cylinder just lagged a bit. The upshot of that is by the time I get that one cylinder 30F or so LOP, the other three are more like 70F LOP.
So, I got to thinking, if I could just get a very slightly smaller injector nozzle for that one cylinder, they might all peak together.
After speaking with a different vendor and getting a lot of Bla-bla-bla for a while, I called Don at Air Flow Performance. Sure enough, he sells an 0.0275" restrictor (stock is 0.028"), for about $27. So I had him send me one and I gave it a try. PERFECT!
See the results before and after below:
Hmmm, picture doesn't post. Well, the url is http://hpaircraft.com/rv8/gami tests.pdf and if you type that in a browser, it will show the plots
Don was super easy to work with, listened to my plan, said 'sure, no problem'. No muss, no fuss. A far different experience from the bla-bla-bla I got from another vendor.
So, I got to thinking, if I could just get a very slightly smaller injector nozzle for that one cylinder, they might all peak together.
After speaking with a different vendor and getting a lot of Bla-bla-bla for a while, I called Don at Air Flow Performance. Sure enough, he sells an 0.0275" restrictor (stock is 0.028"), for about $27. So I had him send me one and I gave it a try. PERFECT!
See the results before and after below:
Hmmm, picture doesn't post. Well, the url is http://hpaircraft.com/rv8/gami tests.pdf and if you type that in a browser, it will show the plots
Don was super easy to work with, listened to my plan, said 'sure, no problem'. No muss, no fuss. A far different experience from the bla-bla-bla I got from another vendor.
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