I have just bought a 94 FM2 turbo miata and with finally driving it in 100 degree temps outside (it was raining for a month and temps were in the 90s), i am having overheating issues. Was hitting 205 yesterday at 70mph cruising on the highway. I drove the car from Tennessee to Tulsa a month ago without any overheating issues or any other issues. Car runs great other than this issue so far. I am leaving in 2 days for a 1500 mile round trip to Santa Fe on vacation and need the car to make the trip to the desert without overheating, or i miss my family vacation this year!
Setup is FM2 with intercooler, Megasquirt, Koyo Rad, bigger injectors.
Read this forum and called Flyin Miata, and the consensus for getting engine temps down is the following:
1) PUT ON THE UNDERTRAY! It came without an undertray. I just got the plastic OEM undertray and my local turbo mechanic said that it will have to be modified due to the intercooler (?) getting in the way. Cant remember what he mentioned caused the undertray to need to be modified. What do we need to do to get this to work?
2) Change to 70/30 coolant mix along with bottle of water wetter
3) Add the coolant reroute (just ordered the FM coolant reroute). I read about some mods or issues needing to be done in order to install the coolant reroute properly (drilling holes in the thermostat for example?, tight fit around X for example?). What do we need to do in order to install the FM coolant reroute properly? How many hours to install the coolant reroute?
4) Add custom ducting in the nose to direct airflow into the rad. I am contacting the moderator on this list that lives in Dallas (Hustler) to see if he can help me install this custom ducting properly. In the meantime, what exact threads are there that show and detail exactly what kind of ducting to do? Would prefer to wait on the ducting until i learn more about it, and just do the above stuff for now. Is that the right decision?
*** With the above said, i am figuring that just adding the undertray, coolant reroute and 70/30 (with water wetter) coolant mix will get me plenty ok to take the trip to Santa Fe in a few days.
What do yall think, i am right?
Long term though (especially since i want to take the car to the track once a month or so), i need to get the car really setup to not overheat, even at the track on a hot Texas or Oklahoma day!
I am figuring that i need to get the above basics done, then get with yall and Hustler, etc and finish anything else that needs doing in order to not overheat even at the track...