Has anyone tried the Temp sending units from Lectric Limited? They look good with the correct button connection. But do they read properly? I have a 70 350/300 small block.
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Re: Temperature sending units
I know the one I got from corvette central is wrong! It reads 240 when the temp is really 180. I am looking for one that reads right myself.
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Re: Temperature sending units
as has been stated in previous posts, you guys need to go junk-yarding for AC Delco temp sending units that can be removed from most of the pass. cars the General produced in the late 50's and 60's. mikeComment
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Re: Temperature sending units
I bought one from Lectric Limited for my 59 and it reads correctly. GaryComment
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Remember....
it takes 'two to tango'.... You have to have a correct temp sender as well as a properly calibrated temp gauge. Each temp gauge was 'hand trimmed' at the factory to read properly. On early gauges the calibration process was achieved by installing the pointer needle onto the shaft with the gauge in a special fixture to generate precision voltage and current flow. On later guages, operators selected from a bin of precision wire-wound resistors and installed a calibrating shunt resistor onto the guage to achieve calibration.
Once any temp gauge has been removed from the car, it's tough believe that it might not have 'lost' its factory original calibration. If that's the case, then you can enter the Twilight Zone of sorting through various temp senders looking for that specific unit which generates a 'correct' reading in your car and swear you now know the RIGHT answer for what's a proper temp sender ohmic profile....
The post that John McGraw made last month (archieves) about how he verified his car's temp guage before going 'shopping' for a temp sender is the RIGHT way to approach things. When BOTH components of the temp reporting system are known and controlled, accuracy problems evaporate. But, dealing with only one variable in the two-variable equation of the system is foolish....Comment
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JG - at one time, just one of the mid-
years JG's listed the AC lettering as upside down - is that still the case or?Comment
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"Accuracy" Is A Relative Term, It Depends....
on your datum point. Forgive me, as I am no expert, but can anyone tell me with absolute certainty, that any gauge/sender couplet will give accurate results across the entire temperature range (i.e. 100-240 degrees Fahrenheit). I have seen so much controversy regarding the 1953 to 1970's temp. gauges here on this forum, that I have come to believe that the General regarded them as no more than "glorified idiot lights". I've got mine calibrated to read 180 degrees @ 180 degrees----any significant upside variation from that will create a "red flag" condition. Of course, I also know where the boilover point lies.
JoeComment
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It's time for a REREAD - my post says
NOTHING about the accuracy of the units - it refers to a difference in the JG recital about how the sending unit is marked.Comment
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Re: Remember....
I still have my "old" sender. It's a bit beat up. Looks like the guy before me put it in with a pair of ViseGrips! But it does read properly.
SkipComment
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Re: "Accuracy" Is A Relative Term, It Depends....
53, 54 and 55 6 cly engines did not use the ac delco(all read upside down , loren, in spite of what some mid year judgng manuals state) temp sending unit. the blue flame 6's used a capillary tube affair just like the 6 cyl chevy pass cars starting in the early(possibly earlier) chevy pass cars used. as has been stated many times previously, go junk yarding and you should find the correct ac delco sending unit in many gm pass cars of the 50's and 60's. mikeComment
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Re: Remember....
I have noticed in the last coule of weeks, that there is a seller on Ebay who is producing a sensor that he claims has the correct response curve and has the correct inverted font on the body. I am going to buy one this week just to test and will let you all know the results. He sells these puppies for about $20, which I think is reasonable if they are right.
Regards, John McGrawComment
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Re: Remember....
John: I could use one, as many others seem to as well. If I may be so bold to ask if you would email me when you have tested it! I would certainly appreciate it! JohnComment
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Re: It's time for a REREAD - my post says
Loren:
My post was not a criticism of your post, in fact, the lettering on my sending unit is also "upside down". But my post had nothing to do with the configuration of the sending unit, it was a statement of my observations regarding the obvious inaccuracy of the early Corvette engine temperature measurement system. The reason for the post, was to address Tony Merendino's original question about whether or not the sender will "read properly". Unfortunate that you misunderstood my meaning--the intent was not to insult you. Let's all try to cut out the caffeine and be friends.
JoeComment
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Re: Remember....
Me too John!!!
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