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FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
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 Posted: Fri Jul 30, 2021 1:15 pm Post subject: Mexi head temp sender location? |
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| Hi. I found a good Mexican F.I. head temperature sender for my F.I., it works great over the heat range...but I'd love to know where the factory put it...any pictures/descriptions? |
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RWK
Samba Member
Joined: June 24, 2009
Posts: 1349
Location: S.W. MI
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| Posted: Fri Jul 30, 2021 2:18 pm Post subject: Re: Mexi head temp sender location? |
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See pics, right of tin screw boss, AFAIK, also see head P.N. and 9mm ex. guide.
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FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
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| Posted: Fri Jul 30, 2021 2:21 pm Post subject: Re: Mexi head temp sender location? |
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| Perfect, thanks! |
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mikedjames
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Joined: July 02, 2012
Posts: 2742
Location: Hamble, Hampshire, UK
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| Posted: Sat Jul 31, 2021 12:39 pm Post subject: Re: Mexi head temp sender location? |
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I used a 10x1mm brake pipe union nut, a short length of brake pipe with a flare and a type K bead thermistor JB welded into the flare as a way of getting a temperature sender into the Mexican (marked EMPI 040) heads on my engine.
It does not read much hotter than the oil temperature - I only have seen up to 285F here when idling with the outside air temperature at 80F.
The temperature on that boss still ramps quicker than the oil, but as you cannot easily fit ring senders on these T1 heads , it is not as responsive as the spark plug thread position, and there is only one boss on each head, they end up as reading No4 and No1 heads. No No3..
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FreeBug
Samba Member
Joined: March 12, 2012
Posts: 4278
Location: deepest, darkest Switzerland
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| Posted: Sat Jul 31, 2021 12:51 pm Post subject: Re: Mexi head temp sender location? |
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| mikedjames wrote: |
I used a 10x1mm brake pipe union nut, a short length of brake pipe with a flare and a type K bead thermistor JB welded into the flare as a way of getting a temperature sender into the Mexican (marked EMPI 040) heads on my engine.
It does not read much hotter than the oil temperature - I only have seen up to 285F here when idling with the outside air temperature at 80F.
The temperature on that boss still ramps quicker than the oil, but as you cannot easily fit ring senders on these T1 heads , it is not as responsive as the spark plug thread position, and there is only one boss on each head, they end up as reading No4 and No1 heads. No No3.. |
Thank you, that's very interesting. I hadn't thought of doing anything like that. I'm asking because the sender was something I could buy easily for cheap, and my Haltec and it talk together fluently the kit had originally come with an air temp sender, to go into the cooling air exit. I'm much happier getting that info from a proper, made for F.I., head temperature sender.
Thanks all for the replies! |
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