The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 01-16-2019, 08:07 PM   #1
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
90 ohm gas sending unit?

I installed a new instrument cluster and was told that I need a 90 ohm instead of 30 for a more accurate reading. Does anyone know where I can get one? I’ve seen them on line but not sure because of angle on top of gas tank. Any suggestions would be greatly appreciated.

Thanks
Greg
GTS61 is offline   Reply With Quote
Old 01-16-2019, 08:45 PM   #2
Indian113
Registered User
 
Indian113's Avatar
 
Join Date: Sep 2009
Location: Monroe,Iowa
Posts: 4,370
Re: 90 ohm gas sending unit?

Speedway sells a fuel level interface that will let you match the gauge to your stock sending unit. It's pricey at $104.00 but you won't need to buy another sending unit and Make It Fit!
Indian113 is offline   Reply With Quote
Old 01-17-2019, 12:23 AM   #3
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,246
Re: 90 ohm gas sending unit?

There is no such thing as an off the shelf 0-90ohm fuel sending unit for an in cab '60-'66 fuel tank. I assume that your new instrument cluster is not an original style cluster? If so, what about changing the fuel gauge to a 0-30ohm gauge? The other option would be to see if member Vin63 would be willing to make you a custom sending unit.
__________________
Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
Captainfab is offline   Reply With Quote
Old 01-17-2019, 09:16 AM   #4
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
Re: 90 ohm gas sending unit?

Thanks for the replies. I don’t know anything about 30 or 90 ohms. I do have a 30 ohm in the tank but it only reads a quarter of a tank and the tank is full. I read where if you have a new instrument cluster like I had dolphin instruments put in. It said to make sure you have a 90 ohm Sending unit. Maybe I installed the 30 ohm wrong? I appreciate the feed back.
GTS61 is offline   Reply With Quote
Old 01-17-2019, 11:29 AM   #5
vin63
It's Better With Nitro
 
vin63's Avatar
 
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
Re: 90 ohm gas sending unit?

The sending units for our trucks in the factory gas tank behind the seat operate on a 0-30 ohm range. The newer fuel level gauges work on 0-90 ohms, so with a full tank, a 0-30 ohm sending unit would only register around 1/4 to 1/3 on a gauge calibrated for 0-90 ohm operation. I replied to your message.
__________________
1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
vin63 is offline   Reply With Quote
Old 01-17-2019, 02:54 PM   #6
DaHos
Senior Member
 
DaHos's Avatar
 
Join Date: Sep 2011
Location: Owosso, Michigan
Posts: 2,853
Re: 90 ohm gas sending unit?

Quote:
Originally Posted by vin63 View Post
The sending units for our trucks in the factory gas tank behind the seat operate on a 0-30 ohm range. The newer fuel level gauges work on 0-90 ohms, so with a full tank, a 0-30 ohm sending unit would only register around 1/4 to 1/3 on a gauge calibrated for 0-90 ohm operation. I replied to your message.

Have the opposite issue, Factory 66 gauge (0-30) using a 69 camaro tank (0-90) only fix is what I have seen here, I need a sender and pickup to fit the camaro tank to work with the oe 0-30 fuel gauge......

http://67-72chevytrucks.com/vboard/s...d.php?t=447185
__________________
1967 C10 SWB
Owner - Rustbelt Restorations
DaHos is offline   Reply With Quote
Old 01-17-2019, 03:48 PM   #7
The Rocknrod
Moderator

 
The Rocknrod's Avatar
 
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
Re: 90 ohm gas sending unit?

Quote:
Originally Posted by DaHos View Post
Have the opposite issue, Factory 66 gauge (0-30) using a 69 camaro tank (0-90) only fix is what I have seen here, I need a sender and pickup to fit the camaro tank to work with the oe 0-30 fuel gauge......

http://67-72chevytrucks.com/vboard/s...d.php?t=447185
Maybe this will help? - http://www.oldengine.org/unfaq/oddbits.htm
And this thread gets around to it - http://67-72chevytrucks.com/vboard/s...d.php?t=447185
Or if you want to have one made - http://tristarrradiator.com/Custom%2...ed%20Page.html
Or buy a new sender - https://shop.classicinstruments.com/sn36
and - https://www.summitracing.com/parts/cin-sn36/\
or - http://www.tanksinc.com/index.cfm/pa...rod/prd276.htm

Last edited by The Rocknrod; 01-17-2019 at 03:55 PM.
The Rocknrod is offline   Reply With Quote
Old 01-17-2019, 06:22 PM   #8
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
Re: 90 ohm gas sending unit?

Thanks for replying and thanks for your service!! My sons been in the Navy for 15 years now.
GTS61 is offline   Reply With Quote
Old 01-18-2019, 02:01 AM   #9
Mack B
Registered User
 
Mack B's Avatar
 
Join Date: Apr 2012
Location: L.ower A.labama
Posts: 518
Re: 90 ohm gas sending unit?

Quote:
Originally Posted by GTS61 View Post
I installed a new instrument cluster and was told that I need a 90 ohm instead of 30 for a more accurate reading. Does anyone know where I can get one? I’ve seen them on line but not sure because of angle on top of gas tank. Any suggestions would be greatly appreciated.

Thanks
Greg
Here is an old post I did on putting a universal sender on a stock pickup tube. Might be another option for you


http://67-72chevytrucks.com/vboard/s...ghlight=Sender
Mack B is offline   Reply With Quote
Old 01-18-2019, 01:56 PM   #10
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
Re: 90 ohm gas sending unit?

Hey thanks! I have dolphin gauges also. I wish I would have saw this before I purchased one. You did a great job on your sending unit!!
GTS61 is offline   Reply With Quote
Old 01-19-2019, 10:44 AM   #11
Railroader
Registered User
 
Railroader's Avatar
 
Join Date: Mar 2018
Location: Florence Ms
Posts: 117
Re: 90 ohm gas sending unit?

There is a (lack of better terms) converter module that will cover the 30 Ohms from tank unit to 90 Ohms for fuel gage. I used one when I changed to new instrument panel. Don't need it now after relocating tank which has current 90 Ohm tank gauge.

Let me know if your interested and I'll find it in the shop parts and advise manufacture and name of unit.
Railroader is offline   Reply With Quote
Old 01-19-2019, 12:46 PM   #12
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
Re: 90 ohm gas sending unit?

Wow Railroader!! I just bought one from another member but thanks for replying!!
GTS61 is offline   Reply With Quote
Old 02-22-2019, 01:43 AM   #13
jeff_wilson70
Registered User
 
jeff_wilson70's Avatar
 
Join Date: Mar 2018
Location: Myrtle Beach, SC
Posts: 29
Re: 90 ohm gas sending unit?

Possibly this will help someone else who happens across this. I ordered a sending unit for a 67 (which is 90 ohms). The fuel sender tube and top fitting is a bit different, but the resistor housing on the float arm is identical. I just swapped out the resistor housing by bending the little tabs up (very gingerly) on the housing, unscrewed the wire from the sender post and installed it on my stock sending unit. Now it works great.
jeff_wilson70 is offline   Reply With Quote
Old 02-22-2019, 08:41 PM   #14
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
Quote:
Originally Posted by jeff_wilson70 View Post
Possibly this will help someone else who happens across this. I ordered a sending unit for a 67 (which is 90 ohms). The fuel sender tube and top fitting is a bit different, but the resistor housing on the float arm is identical. I just swapped out the resistor housing by bending the little tabs up (very gingerly) on the housing, unscrewed the wire from the sender post and installed it on my stock sending unit. Now it works great.
Wish I’d seen this a couple of weeks ago. I paid quite a bit for a 90 ohms for my 61.
Posted via Mobile Device
GTS61 is offline   Reply With Quote
Old 03-01-2019, 12:03 AM   #15
timbuk
Registered User
 
timbuk's Avatar
 
Join Date: Jan 2010
Location: vancouver island BC
Posts: 123
Re: 90 ohm gas sending unit?

good info here so what is the last year of the 30 ohm gas guage my 65 gmc 4x4 is on a 80s frame and uses the 80s dual tanks looks like I need to get a 90 ohm aftermarket guage im thinking
__________________
65 sbfs 65lbfs 65ccsb 65BUS 68GMC and many cars from the 60s
timbuk is offline   Reply With Quote
Old 03-01-2019, 12:14 AM   #16
GTS61
Registered User
 
Join Date: Mar 2015
Location: Jacksonville, Florida
Posts: 66
Re: 90 ohm gas sending unit?

I had to get the 90 ohms gas sending unit because I installed a new instrument cluster. I’m not sure of your situation. Good luck!!
GTS61 is offline   Reply With Quote
Old 03-04-2019, 10:28 PM   #17
timbuk
Registered User
 
timbuk's Avatar
 
Join Date: Jan 2010
Location: vancouver island BC
Posts: 123
Re: 90 ohm gas sending unit?

well I hooked up a 90 ohm equis gas guage to the truck and so far so good easier than pulling 2 sending units and converting them to 30 ohms! 1 tank reads one tank burrys the needle to top of guage
__________________
65 sbfs 65lbfs 65ccsb 65BUS 68GMC and many cars from the 60s
timbuk is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:15 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com