Club Cobra

Club Cobra (http://www.clubcobra.com/forums/)
-   Classic Roadsters II (http://www.clubcobra.com/forums/classic-roadsters-ii/)
-   -   Fuel Level Sending Unit (http://www.clubcobra.com/forums/classic-roadsters-ii/120405-fuel-level-sending-unit.html)

Lightingrod 04-30-2013 06:41 PM

Fuel Level Sending Unit
 
What type of fuel level sending units were used with the CR-II fuel tanks (1991 kit)? 240-33, 16-158 or 0-90 ohms? I tried to take an ohm reading but it's coming up pretty much like an open with a full tank of fuel. It works but I’m not sure how accurate it is. It always seems to sit on full forever and then drop real quick. I have never let it get below about ½.

I guess I may just have to pull the dang tank! When I get it figured out I’m ordering these gauges.

Auto Meter Cobra Gauges - JEGS

:JEKYLHYDE

soulman 04-30-2013 06:52 PM

Quote:

Originally Posted by Lightingrod (Post 1242208)
What type of fuel level sending units were used with the CR-II fuel tanks (1991 kit)? 240-33, 16-158 or 0-90 ohms? I tried to take an ohm reading but it's coming up pretty much like an open with a full tank of fuel. It works but I’m not sure how accurate it is. It always seems to sit on full forever and then drop real quick. I have never let it get below about ½.

I guess I may just have to pull the dang tank! When I get it figured out I’m ordering these gauges.

Auto Meter Cobra Gauges - JEGS

:JEKYLHYDE

Or you could use my type of fuel sender unit on my Kirkham. a flexible wooden dip stick about a meter long !

Soul.

mickmate 04-30-2013 06:58 PM

What kind of fuel level gauge?

Lightingrod 04-30-2013 07:14 PM

Currently pretty cheap looking VDO but I couldn't find a p/n on it!

tcrist 04-30-2013 07:32 PM

When I had to replace mine I used a VDO #301-303 VDO 301-303 VDO Series 1 Gauges

Lightingrod 04-30-2013 07:39 PM

Quote:

Originally Posted by tcrist (Post 1242221)
When I had to replace mine I used a VDO #301-303 VDO 301-303 VDO Series 1 Gauges

Those look a lot better than what's in mine and a couple of options as well!

:JEKYLHYDE

Tommy 05-01-2013 04:08 AM

Lightningrod,
If all you want to do is match the ohms of your new gauge to the old one, here's a way to do that. Go down to your Radio Shack or similar store and buy a cheap 90 ohm resistor. Disconnect your old gauge from the tank sender and wire it so the resistor is in the circuit where the tank sender would normally be. This gives you a known input the same as your tank sender would if it were at the level where it reads 90 ohms. On the 33-240 gauge that will show as about 2/3 full. On the 16-158 gauge it will show about half full, and completely empty on the 0-90 gauge. As most aftermarket gauges are of the 33-240 variety, that's the one I would expect to see.

BTW, if they don't have a 90 ohm resistor, you can wire two or more lesser resistors together in series as long as they add up to 90.

FWB 05-01-2013 12:11 PM

i dunno if you have changed them but the gauges shown in the pics in your album look like stewart-warners to me.....if they are SW then its a 240-33...

mickmate 05-01-2013 06:33 PM

The VDO's I've tinkered with are also 33-240.

Lightingrod 05-02-2013 02:46 AM

They are CHEAP-O VDO's, all plastic!
http://chinaquick-1.com/vdo-2.jpg

Tommy, I had the same idea to use a resistor but that will only tell me what the current gauge is. My concern is that it may NOT be correct! I went ahead and used a variable resistor and took readings at empty and full. The current gauge is a 0-90!

I would be a "Happy Camper" if the signal wire was reading 90, 158 or 240 ohms but it's reading OPEN! As I said it seemed to stay at full forever and If I remember right it would take 10 or more gallons to fill it from 3/4's of a tank! So, bad or maladjusted sending unit? What type, no way to tell for sure with the information I have!

I really like the Autometer Cobra gauges but I want to be sure before I drop $650.00 on them only to find out my sending unit is a 0-90 ohms which the Cobra series don't support! I'm planning some road trips in the future so a fairly accurate fuel gauge is important! I guess I'll just hold off ordering until I can pull the tank and make SURE!

Thanks Guys!

:-)

mickmate 05-02-2013 03:36 AM

So what is your current sender? Impedance and type (inductive or mechanical)?

Lightingrod 05-02-2013 03:56 AM

No idea, that's why I'm going to wait until I can pull the tank and check! I bought the car already built and there are a lot of things that were done half-azz at best! Just do them one at a time!

Tommy 05-02-2013 04:00 AM

Quote:

Originally Posted by mickmate (Post 1242395)
So what is your current sender? Impedance and type (inductive or mechanical)?

I don't think he knows. It sounds like he'll have to pull the tank to find out. ... Project Creep is a ***** (female dog).

Lightingrod 05-02-2013 04:06 AM

Creep, mine tend to run amok!

:-(

dcdoug 05-02-2013 05:59 AM

The unit that came with CSX6022 performs similar and is installed and calibrated properly. Some styles of sending units just aren't very accurate.

Bernica 05-02-2013 10:57 AM

Quote:

Originally Posted by Tommy (Post 1242401)
I don't think he knows. It sounds like he'll have to pull the tank to find out. ... Project Creep is a ***** (female dog).

As Mickmate can attest, I am quite familiar with "Project Creep".:eek: He has the knowledge and the stuff needed to do it right:cool:


All times are GMT -7. The time now is 01:20 AM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: