Ok I put a Inducer in my pump. In order to  help my "take off "  . I was having slipping problem from a dead stop but the inducer helped a little . But still has some slip..
Would this be a Loader problem  or ?
Thanks


Sent from my iPhone using SoCal Jet Boats

GT where do I start checking ?? Packing glad


Sent from my iPhone using SoCal Jet Boats

Clearance was checked before assembly..


Sent from my iPhone using SoCal Jet Boats

Ive talked to some of the higher hp guys, and was told when they launch itll still slip past the WOT rpm just a tiny bit then come down quickly

Dont claim to be a big hp guy, but mine slips when I WOT from a dig and bounce the limiter. Have to work the throttle. Plus the aluminum impeller probably dont like it much anyway.

Look up throttle delay.

Dont claim to be a big hp guy, but mine slips when I WOT from a dig and bounce the limiter. Have to work the throttle. Plus the aluminum impeller probably dont like it much anyway.

Glenn-

Why is it that there are so many boats/pumps doing this? (Steve's, Fordlover's and 69Kona), And mine doesn't?

~500hp 454, AA American Turbine impeller, alum. in a JC pump, with diverter and rideplate/shoe and loader.

Top end 4900-4950 r's, and out of the hole 5050 to 5100, maybe. Because its a heavy ass daycruiser?

There was a difference between the Berk 2A ant the AT 'AA' of ~100 rpm (now its lower) The Berk impy definitely slipped some, out of the hole. The wear ring was at .090" (.045 a side) on the Berk impy. The AT is at .024" (.012" a side, or was in Jan. of '14)

Dan'l

Hit the throttle it slips and hits 5400 then drops to 5100  ...after going..
So ?


Sent from my iPhone using SoCal Jet Boats

If i remember right, Dennis said his slips by a few hundred rpm then comes down. it wasnt as much as mine slips but it was still some

Hit the throttle it slips and hits 5400 then drops to 5100  ...after going..
So ?


Sent from my iPhone using SoCal Jet Boats

Leave it alone.

The pump isn't loading until the hull moves forward.

Your engine package is making too much hp in the mid level,  the curve is likely skewed for pulling a gear, you might see what it does with another couple more degrees of cam timing.

GT

Lee,
I am not convinced you haave an issue.

HAve to remember, you have a bottom that wasnt exactly built for speed (like mine) and the boats heavy...

These other guys you see launching out of the hole are 4-700 pound boats.... Takes a lot less effort to move that than ours

A few hundred rpm on the hit. I think thats pretty much expected.

If i remember right, Dennis said his slips by a few hundred rpm then comes down. it wasnt as much as mine slips but it was still some

I'll have to take u for a ride .. So u can see it


Sent from my iPhone using SoCal Jet Boats

I bet of you look at it,  your hp/torque curve is more linear. Makes the most hp near the top of the rpm scale.

Just a hunch.

GT

Your probably on to something...


Sent from my iPhone using SoCal Jet Boats

We have launch control on the race boat for about 1 second or so off the hit to help with the slip. You should expect at least 200 rpm slip on the hit, more on the spray.

👍👍👍


Sent from my iPhone using SoCal Jet Boats

No jet expert but leave it alone. My boat runs right at 6100 on motor and full stab from a dig it will hit 6400 then settle back down within a second. Like GT said pump isn't loaded at idle.


BECKY WITH THE GOOD HAIR!