What size radiator are the higher horsepower Miata guys running for track use. My set up is a 1.9 liter with a 3071 running on E85. I have an oversized KOYO but my temperatures where still a little high (210) for my liking. I already have a hood vent and I know I need to do a better job with ducting on the bottom of the radiator but will this be enough or do I need something bigger? Suggestions? Thanks

 

The Trackspeed Engineering radiator is what you want, but really you need to have proper ducting.

 

Trackspeed Engineering Dual-Row Race Radiator

If you can wait until the end of June and have an NA, this is your best option.

 

Do you already have a coolant re-route?

 

Yup, we'll need to know if it's an NB or NA.

Edit: Looking back, you have an '05 MSM? Is TSE's NB radiator out yet?

 

NB radiators will follow the NAs by about 2 months.

Theseus is/was 350whp and uses a TSE radiator. Temps are ~205-215*F in 100*F heat. Ducting is still key, but at those power levels you need as much radiator as you possibly can get.

 

My Miata is a 94. I have the coolant re route done. Does anyone have diagrams or photos of some good ducting"? Thanks