i have said it once and i will say it again. "NO ROTARY ENGINE SHOULD BE RUNNING WITHOUT REAL GAUGES". Dont get me wrong--not flaming anyone here.
The stock cooling systems(coolant and oil) can work well(even on track) without FI, but it is on edge. With FI and all the money and effort that goes along with it--a wise man will strengthen the other engine systems. Sorta of like body building the biceps only and not doing any other muscle group. Sooner or later you will have trouble.
olddragger

 

Has everyone forgotten about the Mazsport cooling kit mod? I highly recommend it.

 

Unfortunately, the Mazsport mod (and similar fan operational mods) only keeps your median temps lower under normal conditions.
Once you start to really put heat into the system in hot conditions, it will still over-heat.
In a nutshell, under conditions where overheating is inevitable, this mod will not abate the issue.
You can run the fans all you want - if you are putting more heat into the system then it can dissipate, it will overheat.

Increasing the system's heat rejection capacity is the only thing that will help.
Greater rad area, bigger, higher flowing fans, bigger oil coolers, more efficient ducting, etc.

 

talking of which, who makes a big front mount oil cooler for the 8?

So far my cooling solutions are :
1. Koyo Rad
2. Greddy underslung oil pan for increased oil cap.
3. ? oil cooler improvement??

 

bump

 

from dyno experience i have found that real power in the engine starts at 210 degrees and maybe you loose 1-2 hp around 240 degrees.

the rx8 just loves the heat

 

Interesting. I found in fairly limited drag experience that times drop a few tenths every 10°F or so over 190°F.
I won't push the car at all over 230°F.

 

It is odd. At all of my dynos the greatest power has been had by running the 8 up to three times without a cool-down period.

Not to say that all rx8s are alike. Who knows, some one may go 1 degree over 230 and may have massive detonation.