sierra_5.3
Contributor
Posts: 444
Loc: South Louisiana
Reg: 03-29-07
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02-16-12 06:58 AM - Post#2191193
I recently ordered a set of Dolphin Gauges. They are very nice for the price. All work great except for the fuel sending unit. Their sending unit did not have a suction line for the original behind the seat tank. Does anyone know where I can get a factory style sender that works on 0-90 OHMS? Or, How I can safely modify a stock one to work.
thanks,
Travis
To walk a mile you have to start with a single step.
'66 Chevy C-10 Short Bed, Fleetside, Big Window. 383/700r4
'08 Chevy Silverado 2wd 1/2 ton Crewcab LS, Blue Granite
'11 Nissan Maxima SV, Pearl White
'65 Ford Mustang Coupe 289 w, 3spd |
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sierra_5.3
Contributor
Posts: 444
Loc: South Louisiana
Reg: 03-29-07
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02-16-12 07:06 AM - Post#2191201
In response to sierra_5.3
Also, I was told that some of the 66's have a 0-90 ohm sending unit. Is that correct. If so, my stock sending unit should have worked with these gauges.
To walk a mile you have to start with a single step.
'66 Chevy C-10 Short Bed, Fleetside, Big Window. 383/700r4
'08 Chevy Silverado 2wd 1/2 ton Crewcab LS, Blue Granite
'11 Nissan Maxima SV, Pearl White
'65 Ford Mustang Coupe 289 w, 3spd |
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 Vaughn
"11th Year" Gold Supporting Member
Posts: 13566
Loc: Colorado Springs, CO
Reg: 08-08-04
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02-16-12 02:45 PM - Post#2191341
In response to sierra_5.3
66s had the 0-90 ohm sender.
Your aftermarket sender is probably a universal type, which MIGHT need to have it's own separate hole cut into the tank to install it. Look through your instructions to see if they mention it.
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 LILRED66
"2nd Year" Gold Supporting Member
Posts: 578
Loc: Kansas City, KS, USA
Reg: 12-07-04
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02-16-12 09:37 PM - Post#2191501
In response to Vaughn
Vaughn:
I was not aware the '66 Chevy trucks had a 0-90 ohm sending unit. Where would I find that information?
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lakeroadster
Contributor
Posts: 370
Loc: High Plains of Colorado
Reg: 03-06-11
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02-17-12 05:20 AM - Post#2191556
In response to LILRED66
I went through this a while back on my 1965 and at that time was told that 1964 and earlier was 0-30 ohms and 1965 and up was 0-90 ohms.
For my 1965 that turned out to be wrong, it is a 0-30 ohm.
Seems bizzarre that GM would change to a 0-90 ohm sending unit and guage for the 66, but then again they did some strange stuff back then.
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duffer
Forum Newbie
Posts: 40
Reg: 10-07-11
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02-17-12 04:17 PM - Post#2191748
In response to lakeroadster
My '66 is 0 - 30 ohm (just replaced it), but then again, it's a GMC. They did a lot of things "different". At least not consistent.....
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 hilandr451
8th Year Platinum Supporting Member and Moderator
Posts: 3623
Loc: Bakersfield, Ca.
Reg: 01-02-02
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02-18-12 02:20 AM - Post#2191919
In response to lakeroadster
Seems bizzarre that GM would change to a 0-90 ohm sending unit and guage for the 66, but then again they did some strange stuff back then.
I agree whole heartedly! I have NEVER seen a 0-90 ohm fuel gauge in a 1966 Chevy truck. About 8 years ago I purchased a 0-30 ohm replacement sending unit and installed it in my '66 it works great. Furthermore, every '66 Chevy truck owner I have known who's replaced their sending unit on his/ her vehicle (currently that number is 5) has used a 0-30 ohm unit.
Also, I have 6 or 7 instrument clusters from 1964 to '66 that I have collected over the years. I have had all of the fuel gauges out and hooked up to my 0-30 ohm sending unit on my truck to see if they were any good and all of them worked. (can't say the same for the ammeters though)
I suspect that that spec was probably a misprint, or a typo in some parts catalog that just got replicated. I would really be interested in finding out where that reference originated.
Now, I know for certain that with the next body style change in '67, most of the truck was re-designed and the fuel gauges were 0-90 ohm. The 1967 line was introduced in September of '66 - so maybe that's where they got the 1966 reference. That's the only thing I could think of.
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Vaughn
"11th Year" Gold Supporting Member
Posts: 13566
Loc: Colorado Springs, CO
Reg: 08-08-04
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02-18-12 06:30 PM - Post#2192184
In response to hilandr451
I've looked for the reference, I cannot find it.
From what I remember, it was a mid year change - so some 66s had it, others didn't. Sort of like the hole for the shoulder lap belt - some 66s had it, others didn't.
The 0-30 ohm sender was supposed to be switched to the 0-90 ohm sender in 66 - presumably because the 0-30 ohm sender used more current and because GM was trying to eliminate some wiring design issues (like the switch to voltmeters from ammeters that was done on the 73-up trucks, because the ammeters could fail and cause wiring fires).
The senders in the gm cars were switched to 0-90 ohm in the 64-66 time frame, I presume that they did it in trucks last.
A couple of people that I have helped online over the years have found that they had the 0-90 ohm senders in their 66s.
If someone comes up with definitive proof one way or the other, feel free to post it.
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