Thread: new prop pitch
12-04-2006, 09:32 PM #1
new prop pitch
i know i have to repitch cause my rpms are too high, I am turning my 14/20 7310 rpms @ 70.2 mph in 78 degree weather(from the summer). as i dotn plan to do any winter riding what should i re pitch to? i still want good holeshot and top end.
what will this do just be better for the engine or will i see more overall performance? how many mph at wot?
12-04-2006, 09:49 PM #2
How is your holeshot now? No prop spin? You want to be 7100-7150 in the heat.You are spinning a 14/20 @ 7310.Your speed is a little low.There are several shops out there that can bend your prop.My guess would be a 14/21 maybe a 14/22.What is you average rpm in the heat?
12-04-2006, 10:24 PM #3
You need to first send that prop out and have the pitch measured. Many of the stock otb 14/20's actually are pitched 13/19. Once you know what pitch you are turning now, you can pitch up from there.
12-04-2006, 10:52 PM #4
- Join Date
- Jan 2006
- Texas City, Texas
12-05-2006, 11:33 AM #5
its a true 14/20, i damaged it and sent it to island and re repaired and trued it to 14/20
12-05-2006, 11:55 AM #6
I agree with Woody, that is to much rpm for that speed. My
box stock DF turns 7190 to 7210 at 74-75. What tach are you using?
Did Carl cut the trailing or leading edge of the prop?
12-05-2006, 10:10 PM #7
tiny tach commercial, my ride plate is unmoded which i think is robing alot of speed, im getting it moded this winter. you can hold my ride plate at an angle and see a divit(sp?) in it. it goes down then back out again. so im thinking that it is robbing me of lot of speed.
12-06-2006, 08:20 AM #8
The unmodded plate is surely robbing some speed but the rpms
would be down even further due to the increased wetted surface the
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