Rather than just making another dual 12" spal shroud, why not make brackets to mount a single volvo fan with no shrowd. I think the race crew would be more on board with that, OEM quality fan that flows as much as 1.5 12" spals and not blocking airflow from most of the rad when at speed.

Do you have a part number for a the fan you're speaking of. or mounting basic hole locations for mounting points. I could have that done by this afternoon with enough info.

Is it the 15" fan front the volvo 850s

https://www.partsgeek.com/xb8g2h7-vo...y+Fan+Assembly

is this the fan you want in a shroud

I forget, some crazy volvo guy has a sight where he compares all of them and figures out the best one, the one thats almost as crazy as the tarus fan.

From what I've read today the 93-97 is a 15" fan with a high and low speed with the high speed gerring like 3500cfm. Then after 97 went to a smaller lamer motor.

I'm picking up a fan on Sunday for $50 off cl and will draw up a mount kit Monday.

Anyone else interested in a single fan with huge cfm numbers

Doube post

I've always liked the idea of a full underbody thats mounted on quick release posts. Some day, I guess.

This sounds really promising re: the huge fan. If that shroud has space for an oil cooler then that would be an awesome place to put it, i.e. out of the way of getting damaged easily and in a place with good air flow.

What size oil cooler do you guys want the mount to be fitted for? Im assuming a 25 row setrab cooler.

Fan was in bad shape so ordered a dorman oe replacement fan today. Should be here on the 29th. Once the fan shows up I should have a mount within a day or two.

as far as an oil cooler I think it'll be a really tight fit with the fan but I'll do my best to get it all behind the radiator.

anything you guys want to see made in the meantime before I hop back onto the front ducting and undertray

25 row

I have a rough model of the fan with a 25 row setrab and it fills every bit of cooler we have. It might get better once I get the fan and can throw some accurate dimensions in.

The other part I'm on the fence about is how I'm going to seal the fan and oil cooler to the radiator. I'll get creative with this and post what I come up with. I want this to be a cheap and easy solution for cooling.

Here is a teaser of what is to come


Teaser deleted

i did something similar, albeit not that fancy and rather more homegrown: https://www.miataturbo.net/build-thr...3/#post1399530

https://cimg4.ibsrv.net/gimg/www.mia...de59773c82.jpg

works great, but fitment with the intercooler pipe going to the intake was tight

FM claims that the dual spal 12 inch setup is like 4700 or something.

FM kit claims 4700 m3/h. When converted it is about 2780 cfm

Using a full fan shroud on a track car is a bad idea. It will not flow anywhere near enough at speed. You want as few obstructions to flow as possible. I had the full FM stage 2 airflow kit and their crossflow radiator, and my car would overheat in 75 ambient temps with a 200whp rotrex. Pull the shroud, pull the second fan, and temps didn't go over 200.

Just mounting the fan and the oil cooler to the back of the radiator is what you want to do. Any shrouding is just going to decrease total airflow through the radiator. Fans are only needed for cooling in low speed situations, where not a lot of heat is being generated, or in high throttle low speed applications (like an ag tractor or a bulldozer) which no track miata should ever see.

Edit: for hot areas and AC use, a fan shroud may be useful to ensure fan draw is completely through the radiator.

Understood. Leafy steered me in that direction and i am already working on a solution with the volvo fan. Ill have the fan mount finalized today other than a few minor changes once the fan arrives. Ill post a pic of what itll look like later today

https://cimg6.ibsrv.net/gimg/www.mia...896bc43619.jpg
What do you guys think of this. Only thing left is the mounting holes for the fan and a few relay mounting tabs

If it's a cross flow radiator, the oil cooler might interfere