I remember in the "old days" when we used to bolt plates on the secondary clutch sides to stop any windage effect.
Hmmmm ....
Did your plate go all the way to the the center and the outside edge?
I remember seeing them, but I don't recall the exactly.
A plate bolted over the fins on the back side of the stationary half of the primary clutch could very well [greatly] IMPROVE flow.
If the surface is just open - it won't "pump". But if you plate off the middle, the centrifical force will pull air in to the center and throw it out at the bigger diameter.
I have used this trick many times on the engine lathe as an example. If the part is hollow, I can leave the lathe run and it will draw air in through the center of the part, and the 3 jaws of the chuck will produce a fanning effect.
Another example is the chimney effect. I had a ventless LP gas burner on the wall of my shop. The glass got busted out, but I wasn't worried about anyone getting hurt. So I left it alone. 'Till one day I came back after dinner only to smell FIRE! It took some time to find it, but it was the OSB behind this heater smouldering.
W/O the front glass plate installed, the heat just radiates away, but with the plate installed, the heat draws fresh air in through the bottom and the heat is taken away out the top, leaving the back much cooler.
One is heat generated, and the other is centrifical force generated, but still both the same end effect.
Now maybe the old clutches were completely covered (seems to me they were?) but that was 90hp ago too.
Point being, that if designed for this porpoise, a plate there would actually much increase your cooling effect. (I have not seen it)
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Question for you guys, do you know if the T-Motion lockout kits for the 18 will work on the 19? I was at the parts shop and they had mentioned how a few things were adjusted on the exhaust can when i picked up my HPS Silencer as well as the other 19 updates. I would appreciate any help or opinions on which T Motion lock out kit you prefer!
