I went back twenty or so pages to find out the cooling issues. Wright and Zac gave great advice but I guess you installed the spal because it would fit but it is not adequate. Too small and too few amps.
I also saw where you had some cooling issues at speed, so i have some suggestions that should cure both.
First, get one of the following 12 inch fans (no substitutions!):
Derale 18212
https://www.ebay.com/itm/Derale-Electri ... 2531244239https://www.ebay.com/itm/Derale-18212-1 ... 1556220258Hayden 3812
https://www.ebay.com/itm/Hayden-3812-En ... 2552318059Derale 16924 (listing is wrong, it is a 12" and pulls over 24 amps but requires a shroud to pull)
https://www.ebay.com/itm/Derale-Cooling ... 2337957769Suggest you redo the rad mounts to push the rad forward about 1.5" at the bottom and rotate the top forward about 15-20 deg to align the flow path with the airflow coming into the nose and allow for a puller arrangement. Pushing it forward will also reduce the gap to the nose. You'll need to rework the upper nose support of course.
The fan will need a 30 amp relay for high, 20 amp for low or just wire high. Do not just use a toggle. Use 12 or 14 ga wire and yellow terminals.
Second, cut a pice of cardboard to fit snug in the nose in front of the rad, transfer to .040 3003, then pop rivet flanges to pick up holes you will make in the nose supports. Rivet aircraft baffle sealing strips along each side to where they hang off the 3003 by a couple inches so you can bend them forward in the nose. Airflow will seal them to the nose.
http://www.aircraftspruce.com/catalog/a ... seals5.phpBe sure to reinstall a thermostat (180-195) to speed warm up and maintain engine temp and internal tolerances.
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Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS
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360LA 442E: 134.5x46x15
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Champion/Book:114x42x11
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McSorley 442:122x46x14
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