Gas tank baffles and wandering fuel gauge

[allen]

I have an older NWMP 23 gallon efi tank i bought through wild horses many years ago. Tank is out and heading for a cleaning. I was wondering if there was a way to stop the fuel level on the gauge from increasing and decreasing depending on whether im accelerating, going uphill, down hill etc…. Depending on the situatiuon, there is almost a 1/4 tank swing one way or another. Being that the new tanks are north of $1k id rather not have to buy a new one, unless the shop doing the cleaning discovers rust holes or something else
thanks
allen

 

[DirtDonk]

Hmm, that’s a new one on me.
I had the same tank from probably 30 years ago now, and never had that issue.
Not only do I believe that the tank is in fact baffled, although you can check that for yourself soon, the gauge should not react that quickly in the first place I do not believe.
They are dampened and compensated, I guess would be the proper term. They should not react quickly, so maybe there’s something else going on.
Do you have stock gauges? Stock instrument cluster regulator? Or something else?

 

[DirtDonk]

A second suggestion would be to verify the angle of the sending unit/float when you remove it.
Then maybe put it in 90° different if it will fit that way.

 

[Johnnyb]

I have an older NWMP 23 gallon efi tank i bought through wild horses many years ago. Tank is out and heading for a cleaning. I was wondering if there was a way to stop the fuel level on the gauge from increasing and decreasing depending on whether im accelerating, going uphill, down hill etc…. Depending on the situatiuon, there is almost a 1/4 tank swing one way or another. Being that the new tanks are north of $1k id rather not have to buy a new one, unless the shop doing the cleaning discovers rust holes or something else
thanks
allen

I got one of these: https://www.tanksinc.com/index.cfm/page/ptype=product/product_id=346/mode=prod/prd346.htm

I have not used it yet, but when I saw how the standard sending unit and float were set-up, I wanted no part of it. I am using an older BC Broncos tank and here are my spec's:

1- T--ORG-12 - Fuel Sender
Fuel Sending Unit: 73-10 Ohms Tube Style Fuel Sender
Floatless Sender Length: 12 inch (+$13.00)
@ $112.00 ($112.00)

I deliberately left it a little high (short) to provide a reserve and keep me from running out of gas.