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MX5 runs warm ?
FFMan - 10/8/20 at 09:45 AM

Just testing an MX5 based Haynes roadster I acquired part built and am turning into a track car.

On it's first road test last night, the temp gauge (original dash) got up to 3/4 way and stayed there. Fan didn't cut in and it didn't seem too hot under the bonnet.

It seems these days the gauges are often not proper gauges, and are ecu driven.Not sure if its the case here as it stayed rock steady at 3/4 way which seemed a little odd. It does start from the bottom when cold and rise with the engine run time, so I know it is not entirely broken.

Can anyone offer any experience from their car, or do people all switch to different dashes and gauges etc ?

JAG - 10/8/20 at 10:06 AM

I have the Mazda 1.6 from an Eunos (MX5) in my car. It's completely standard and I didn't use the original gauges. I have a Racetech mechanical water temperature gauge and a VW Polo radiator. It runs around 80-90 Celsius and the fan only cuts in when the car is stationary for over 5 minutes or so.

The VW Polo fan switch cut's in at 92 Celsius.

gary gsx - 12/8/20 at 06:53 PM

Evening


Nothing to do with running hot because mines not running

But question is what is the performance like? My build is currently a 1.6, I know a 1.6 wont set the world on fire but do they go ok?


Gary

FFMan - 12/8/20 at 06:57 PM

quote:
Originally posted by gary gsx
Evening


Nothing to do with running hot because mines not running

But question is what is the performance like? My build is currently a 1.6, I know a 1.6 wont set the world on fire but do they go ok?


Gary


I'm not sure how it goes, there were a few issues on the first test so i didn't push it at all, inc poor brakes. Hoping to test it again this weekend and give it a bit more.

getting warm likely a combination of duff stat and silty cooling system. Flushed out best i could and will fit new stat, plus also fitting a proper temp gauge running it's own sender so i know what is really going on.