Reply With QuoteIs this yours ???
If not do you have the same bottom ???
http://www2.***boat.com/image_center...ct0554-med.jpg
http://www2.***boat.com/image_center...ct0552-med.jpg
I recently put on shoe and ride plate kit from Hi-Tech on my berk "e" pump in my Sanger 20.5 Mini-cruiser.
The idea was to cure the nasty porpoise I have at mid range speeds. I still have the porpoise, and I now have some handling quirks when letting off the gas after a high speed run. As I let off the gas, the boat will get very squirrely and try to turn one way or the other.
Is this caused by the shoe? The shoe has no shims under it, and it is roughly even with the rest of the keel due to the recessed nature of the "e" pump installation.
Do any of you pump guru's have some thoughts on causes or solutions? To me porpoise and shoe in a E seem odd. I don't think your running fast enough for a pop off valve-yet what you describe sounds like a dynamic head condition. if your running in the 80s maybe so! Did this change the porpoise condition at all! and did this kit add a full ride plate to it. I think you will find you have a 1/2" or so inset delta bottom on yours. If so the Keel position will not be a good rule here as you may well require far more shoe then most or even a backcut shoe. You need to know what kind of pressure you are seeing on shut down and running before you go much further. If your boat is stuffing its nose in the water and rear is washing out you do have a problem. Dave @ Aggressor Jets (888) 246-5075
Is this yours ???
If not do you have the same bottom ???
http://www2.***boat.com/image_center...ct0554-med.jpg
http://www2.***boat.com/image_center...ct0552-med.jpg
Pops1, current top speed is in the low 60's. The plate is a full length deal, 22 inches long if I remember correctly. The biting edge of the shoe is 1/16 to 1/8 below the keel line when using a straight edge. There is a very small delta pad about 8 inches wide and extending 6-8 inches forward of the throat of the intake. I'll try to take some pics to show what it looks like.
The mid range porpoise has not changed at all by adding the shoe and extended plate. The porpoise is somewhat weight dependent. With a lot of passenger weight in the rear of the boat the porpoise is much more severe and cannot be eliminated with the use of the diverter at RPM's between 3500 and 4500.
At full throttle, the ride is aired out and very stable. When letting off the gas, the turn is not violent or sharp, but is unsettling.
Squirtin Thunder, no that is not my boat. The outside portions of the bottom and the strakes are very similar, but the keel is not as flat as the picture you posted.
Pops1, current top speed is in the low 60's. The plate is a full length deal, 22 inches long if I remember correctly. The biting edge of the shoe is 1/16 to 1/8 below the keel line when using a straight edge. There is a very small delta pad about 8 inches wide and extending 6-8 inches forward of the throat of the intake. I'll try to take some pics to show what it looks like.
The mid range porpoise has not changed at all by adding the shoe and extended plate. The porpoise is somewhat weight dependent. With a lot of passenger weight in the rear of the boat the porpoise is much more severe and cannot be eliminated with the use of the diverter at RPM's between 3500 and 4500.
At full throttle, the ride is aired out and very stable. When letting off the gas, the turn is not violent or sharp, but is unsettling.
Squirtin Thunder, no that is not my boat. The outside portions of the bottom and the strakes are very similar, but the keel is not as flat as the picture you posted.
Can you take some pics of the bottom of the boat and post them please ???
Here's a picture of the rear.
http://www2.***boat.com/image_center...sangerrear.JPG
I'll see what I can do about getting some pics of the bottom.
Here's a picture of the rear.
http://www2.***boat.com/image_center...sangerrear.JPG
I'll see what I can do about getting some pics of the bottom.
I see !!! That is the newer bottom !!! Now I know what we are taking about !!! Yours has a faster bottom on it than the one I posted.
Thanks
Jim
Here are the pics of the intake, shoe and rideplate.
http://www2.***boat.com/image_center...77100_6721.JPG
http://www2.***boat.com/image_center...77100_6735.JPG
http://www2.***boat.com/image_center...77100_6738.JPG
http://www2.***boat.com/image_center...77100_6736.JPG
Sorry about the crappy pics, my 11 year old took them as I'm too fat to fit under the trailer.
To prevent any cracking I would fill the holes in the suction piece with Sea Goin Putty !!!!
Second I would send that shoe to Jack or Duane and have it modified a bit. What I mean is have it turned into a back cut shoe.
There are others that can explain better.
Squirt
Thunder, you are absolutely right. That shoe is too deep on that boat. The reason is that the pump is set too deep in the boat. Look at the left side of the shoe in the picture. See that piece of suction housing showing. That pump should be up in the boat to where that is flush with the boat bottom. That's one of the problems with e pumps, they are very seldom set in the boat exactly the same twice in a row. Now that I see what's going on here, send that shoe back to me and I will change the location of the biting edge. These E-Shoes are just like a lot of other performance parts that you can buy for your boat. They are a good part to start to work with, but each one usually needs some adjusting or tweaking. Send it back, and I'll see if I can help you. Duane HTP
I also have a top loader that I would like for you to try along with that shoe. It has helped some boats. Duane HTP
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