Temperature sending unit
Burning Brakes
Joined: Nov 2006
Posts: 893
Likes: 7
From: Orange Park Florida
Sending units use the same threads as pipe fittings. Go to Home depot or Lowes, take your unit, and look for a pipe fitting reducer - male on one end, female on the other. You may need a short nipple for the head.
Le Mans Master
Joined: Sep 2001
Posts: 7,739
Likes: 630
From: Unreconstructed, South Carolina
I just had a new 383 crate motor installed. The garage installed the temp unit in the intake manifold. The original 1970 motor was in the block.
They told me that that it has to go in the intake because it is a newer style block and my unit will not fit to this block.
I do not like the look of the wire going to the intake. Is there a way to make it work in the block like the original 1970 350
They told me that that it has to go in the intake because it is a newer style block and my unit will not fit to this block.
I do not like the look of the wire going to the intake. Is there a way to make it work in the block like the original 1970 350
This has been hashed over hundreds of times. Apparently No one makes a little sender that has EXACTLY same values, range & linearity as big OE sender; disallowing new small to work perfectly w/ old OE gage. Yes, late C3 senders work pretty good but they're not a perfect match to old gage.
Suggest leave it in intake. All pro race cars do. It'll probably read a couple degrees cooler than when in head (near exhaust ports); but at least gage response will remain linear.
FYI ... 'Lectric Limited makes very good & accurate OE replacement Big senders ... but, no they don't make little ones matched to old big values.
everything on the web's suspect; including the very words I just wrote.
Advanced
Joined: Dec 2015
Posts: 72
Likes: 0
I got wt359 and tested it read 175 ohms at boiling water which is gonna make the gauge look way colder than it is so its wortless
Le Mans Master
Joined: Oct 2001
Posts: 5,943
Likes: 3
From: Wildwood IL
Exactly what I had to do for my AFR's. You MUST put in a sending unit that is compatable with your gage. Not any ol sending unit will give you accurate readings. I bought a new 72 sending unit that supposedly had the correct Ohm readings for the original 72 temp gage, but did not trust it. Put the temp sender tip in a pot of water on the stove, connected an ohm meter to the sender, and a thermometer in the pot. Recorded the ohm's the sender was omitting and recorded the corresponding temp of the water. Went to about 210*. Installed the sender in the heads, connected the Ohm meter, then took readings at each line in the temp gage in the car as they went up. Referenced the thermometer readings from my pot, so I now know exactly what temp each line on my gage is.
Eddie
Eddie
Last edited by Edzred72; Mar 27, 2016 at 10:17 PM.
