SoCal Jet Boats
Tech Talk => Jet Pumps => Topic started by: IslandRunner on February 03, 2015, 12:28:37 PM
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Changing from a none split bowl to a split Dom bowl that had a shouldered impeller, want to know if you can use a none shouldered impeller in it with a bowl stufer to make up the difference? Reason is : I have a new none shouldered impeller and the shouldered one is shot!
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Yes, you can either run it with or without a stuffer. My opinion is that a stuffer creates a smoother transition from the impeller into the bowl and allows the pump to build thrust slightly faster than the without a stuffer. A shouldered impeller has a pretty good gap between it and the back of the impeller hub, so it doesn’t blend the transition between the bowl and impeller perfectly. Clearance exists between both the stuffer and the shouldered impeller and that volume still has to be filled with water before thrust is created. You will really only notice a difference on the initial hit.
Cheers,
Joe
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thanks Flusher, You are totally right ,there's alot of room between the impeller and the bowl. I think a stuffer will be a must have. I am also changing out the suction side to a dominator while its apart . Surprised how much heavier the dominator suction side is then the berkeley JC.
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The early oval logo suctions are really thin, even compared to the later cursive logo suctions. Both are known for cracking, especially when used with big power. The Dominator is much thicker, especially in the flanges to help prevent cracking and gasket failure.
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...the shouldered one is shot!
What is wrong with it? What size? What material? It is possible it can be saved. If the damage is to the leading edges, we have cut them way back and re-detailed the front with no change in RPM.
Pics?
Might help you save money.
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little help? How do you post pics on here? :banghead:
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still haven't figured out how to post a pic.
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I looked the dominator impeller over again today. The leading edge is banged up and some good scars in it. The front shoulder has some deep groves also. I would not use it. (Will make a good wear ring installation tool) It also has a much shorter front shoulder and uses a short wear ring with a large gap between the suction side and the impeller. The leading shoulder on the JC impeller is much longer and fills the intire wear ring to the edge of the intake. Seems like a lot less chance for blow by. I did find out the out side diameter of the dominator bowl is larger then the JC bowl by about 250 thousands, so the transom cover needs to be modified to fit over it. Also the clean out cover sits down inside the intake 3/8", going to machine that off on the mill.
Can anyone tell me how to post pics on here, I have a billet loader that look really nice that I cant find any info on, if I could figure out how to post a pic I'm sure someone on here knows what it is. Thanks
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Are you using the app or on the computer. If your on the app there are icons on the bottom of the screen. On the computer there is a box under the comment box that says add attachments.
Sent from my iPad using SoCal Jet Boats
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(http://)[attachimg=1]I have tried to post pics from my iPad and my phone. Haven't tried the computer yet. I go to attachments and choose the photo and it won't show up. Not sure what the problem is.
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Not sure about iPad, but on my S3, after selecting the pic, click ATTACHMENT. You will see it hourglassing as the pic is attached to the post.
That is an interesting loader. Any history on it?
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Not sure about iPad, but on my S3, after selecting the pic, click ATTACHMENT. You will see it hourglassing as the pic is attached to the post.
That is an interesting loader. Any history on it?
No history.