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Posts: 744
| How does increasing the pitch affect the RPM at WOT?
Without getting into all the boring details, I can get to 5400 RPM with my current prop. I'd like to possibly try increasing the pitch (same dia), but I am wondering what that will do to the RPM's?
I am guessing it would slow them down a bit? |
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Member
Posts: 744
| OK, after a little research I see that yes, more pitch will slow it down.
Currently running: 14" x 19 @ 5400 (5500 max). With full load, it still has a good hole shot, 41-42 mph top end.
Considering: 13.2" x 21
Any thoughts on how those blades would compare? Do you think the 13.2 x 21 would keep me under 5500? |
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Posts: 3899
| Dave?
What motor? 2 or 4 stroke? Carbed or EFI or DFI?
Stainless or Aluminum prop?
3 or 4 blade?
\What are you trying to accomplish? |
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| Increasing the pitch will drop the rpms @WOT.
It wiull slow your hole shot, too. |
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Member
Posts: 2300
Location: Berlin | 90hp Johnson 3 blade aluminum. He want is to go 80mph and still have a good hole shot. You coming tonight? |
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Member
Posts: 744
| 90 HP Johnson, 3 blade aluminum, 2 stroke.
I'm trying to go faster....I'm boat #14 in the Sheephead tournament and I need to get to my super secret spot in the mouth of the river first 
I think I am just going to stick with the 14 x 19 and go to a stainless version....the 13.2 x 21 will destroy the hole shot and I don't think will give me much (if anything) more on the top end.
42 mph in a 90 HP glass boat with full gas, anchors and gear isn't too bad I guess.
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Posts: 3899
| Rich S - 5/22/2012 11:53 AM
90hp Johnson 3 blade aluminum. He want is to go 80mph and still have a good hole shot. You coming tonight?
It's all up to the wife. hehehe
Edited by Shep 5/22/2012 2:47 PM
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