Nosecone speedometer pickup question.

[Carter Powell]

Would this work? On a Bobs nosecone at the very top of the cone, where it is even with the top of a stock lower the metal is only about a quarter of an inch thick. If you drilled straight down into the cavity where the water is picked up and installed a small tube outlet would that water pressure be overpowering for a speedometer. I am thinking this would work. Any ideas would be appreciated.

Many thanks, Carter Powell

[PanRonnie]

More trubble than it is worth
a Gps speedo is not expensive

[OnPad]

I bet it would work. You could calibrate with restrictors.
Good idea!

[derekfl]

A lot of lowers have pickup installed there. It is a big improvement over gps cuz it is around 10 mph faster. Which translates to 100 more hp. And no extra fuel!!

[David - WI]

I don't think that would work... the
cooling system pressure is limited by the poppet valve? Speedo needs it's own inlet.

[OnPad]

Pre water pump from the poppet.
Maybe you just end up with a extra 4" water pressure gauge, kinda?

[David - WI]

But the impeller just folds in at speed... I'm told.

[Carter Powell]

I have GPS in my other boat but I was just wondering if this would work. I have another boat that I am redoing and it already has a non GPS speedo in it. I was told that the pressure is the same whether it is a small hole or a larger one. Just an idea.

thanks, Carter

[OnPad]

Your probably right about restrictors not working, as there is no flow out of sender tube.
I think you ought to try it, and let me know.
I have a couple boats, could use this.

I build flush mount water pickups into the bottom of my model boats with ks brass tube, if your willing to drill a hole in the bottom of your boat, I'll tell you all about it.

[InjectorService]

Is there a reason you want to go to these lengths to retain a speedo that's not accurate? Can't you get a replacement speedo in GPS?

[OnPad]

This would be my reason. Retaining a vintage matching dash, with stuff already owned.


The one boat that I have a working mechanical gauge on is pretty accurate... If you can believe that.

All that being said, I use my phone or sonar unit for gps speed.

[David - WI]

I have a transom mounted speedo pickup... just a p.o.s. plastic one that flips up if you run over something.

They're like $5 and work with any pitot-type speedo, so why fool around making something in the lower unit?

https://www.greatlakesskipper.com/fa...-pickup-sender

[OnPad]

[Carter Powell]

The reason I wanted to try this is because of all the original gauges. The gauges are autometer and the speedo is already there. I know that GPS is the way to go but I was just wondering if somebody thought this method might work, that's all.

Thanks, Carter Powell