water temp guage

[exboatracer]

I was thinking of getting an electric water temp guage and putting the sender unit in a bung on the radiator. Will I get an accurate reading there? I know I should have drilled and tapped the pass side head when I had the heads off(I'm kicking myself for not doing it). Thanks.

[exboatracer]

Ok,Ok, I'll answer my own question. The radiator is probably not a good location to get an acurate reading. The pass side head is the right spot so I''ll look for an electric guage with a 1/8npt sender and use a speedway motors adapter. Why didn't I think of that? LOL.

[gagliano7]

What vehicle is this going in?I used a 3 wire ls1 temp sensor in the driverside head.2 wires go to the pcm a one to the gauge in a 1992 chevy truck.

[exboatracer]

It's a 1990 chevy truck with a 5.3 (cable throttle body pcm).I've heard of that set-up, would that work in my 1990 to keep the stock guage operable? I've got the original 5.3 temp sensor in the drivers side head with a stand alone Nelson Perf harness. I would think that all I would have to do is splice the 3 wire sensor to 2 of the wires going to the pcm and run the third wire to the guage. Am I on the right track? (not so good with wiring as you can see). Thanks and Merry Christmas to you and yours.

[gagliano7]

That is what i did.Some people say there gauge will be off by 10-20 degrees but mine is perfect.

[exboatracer]

Thanks for the info.

[exboatracer]

I went with the elec.guage,braized a brass fitting onto the speedway motors fitting and put it in the pass side head. Had to drill out the fittings a bit to get the sending unit some room for water circulation.Done deal.