Thread: Set back prop questions
04-08-2011, 04:17 PM #1
Set back prop questions
So i've seen some set back props used before and i understand the theory behind it and how it works. Is it just machining the back of the prop to get it closer to the pump vanes? I have the equipment to do this and just got a new prop so im wondering if i should give it a shot before i put it in. Every little bit helps.
04-08-2011, 08:26 PM #2
i would not recommend you do it if your running a stage 3 or better type set-up..... it will make the prop spin way too easy.
04-08-2011, 08:59 PM #3
By Spin you're talking about cavitating? Damn if anything i thought that would help stop cavitating.
04-08-2011, 09:58 PM #4
I would love to learn more pros and cons about this mod myself!! Are there many guys out there with this mod? Ive never heard of it untill last week. It sounds like a pretty interesting trick.
Speedfreaks racing: Are you saying that this mod is only good for slower skis?? If so, what MPH range are we talking about then? I'm working my way towards 80, so does that mean I shouldnt get the set back mod?
04-08-2011, 10:14 PM #5
A friend on mine had his prop done by speedfreaks on a 80mph+ rxt and he LOVED it, Thats all he talked about. He said the holeshot and mid range was insane. He has been trying to talk me into doing this to my stage 3 rxp.
04-09-2011, 07:53 AM #6
speed has nothing to do with it.... only how much power your making. i would say not to do it if your running a BIG CHARGER & ECU BOX. the set back mod in my findings helps the ski rev up quicker.... so with all that power your just going to cavitate. the set back mod seems to work very well on stock ecu boats. i always ask people what there set-up is before i do a set back mod.
01xdime, there if you have prop spin there are other things that can be done to help the proplem .... like smaller nozzle, R&D tail cone, or add some root angle between the blade of your prop. also check the clearance between your prop and wear ring especially if your running a stainless ware ring... a stainless ware ring can kill a prop pretty fast.
04-09-2011, 05:25 PM #7
I haven't had any issues with cavitation yet. just changed a lot of stuff soon and i haven't tested it yet. Here's my setup
Rude fuel controller
Mild port and polished head with ferrera valves
48lb bosch injectors
external IC w/bleed
2 degree wedge
Riva rideplate with heat exchanger
15/22 untouched so far
I'm just looking for every little tiny thing that i can do and this made sense to me but i don't have know much about it.
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