counter rotating alpha drives
#1
counter rotating alpha drives
Need some input from the board. I have '86 272LS with 365hp small blocks running 64mph @ 5000rpm in flat water. Drives are alphas (1.5 ratio) spinning 21p Turbo stainless props. Both drives are righthand turning with simrek showers. Would installing a port LH lower give me some more top end? Looking to get a little closer to 70. thanks for any input.
#6
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Need some input from the board. I have '86 272LS with 365hp small blocks running 64mph @ 5000rpm in flat water. Drives are alphas (1.5 ratio) spinning 21p Turbo stainless props. Both drives are righthand turning with simrek showers. Would installing a port LH lower give me some more top end? Looking to get a little closer to 70. thanks for any input.
Try a 23 Mirage 3 blade on that once and if you gain any speed
#7
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your talking about a 24% increase in speed. you not going to do that with props and c/r, you could gain a little if you did it and really played with props, but if your lifting the back end with the props thats going to put a lot more strain on the alpha's. is that flat-flat water?? that would be the most drag, how easily are you pulling 5 grand?
#8
It was real flat water. No chop. It pulls 5000 pretty easily and was trimmed out , but no tab. The props had a couple of dings (I boat in the Great South Bay,which is pretty shallow), and I had them redone, but didn't get to re-test before winterizing.