Exactly what I was thinking...The hottest I've seen after changing to a 180 degree t-stat was 104, and that was on a hot day.

Personally, I'd go with the fluidyne...It's what I'll be getting shortly.

 

Its for sure not stock, but I dunno, it didnt take all that much, I dont recall grinding much, if anything. And NEVER do I get above 81c even stop and go.

 

Whats the best 180 temp t-stat?

 

There are a number of posts in this section saying that "my car never goes over XXX". The fact is, that every FD's temperatures will be controlled by the fans if you are stuck in traffic (not moving). What radiator you have, doesn't really make any difference under those circumstances. The fans control the temps. A koyo, with no fans, will overheat when stuck in traffic. It will just take a little longer to do it than a stock radiator.

 

i gots the koyo and I live in socal with the stock fans......barely use them.....and the koyo is in the stock location and super easy to install........ but I have nothing against fluidyne.....so whateva is cheaper

 

I've talked to Rotary Performance and Gotham Racing and both of them say anything above 115C is dangerous. My car acts funny sometimes. I will be cruising to get up to temperature before I go all out and the first time that I punch it the temp rockets up to 101-104 and then drops back down to 90-94 for the rest of the time that I'm running it hard. Never found out why but I really don't care unless it gets dangerously high.

 

i have also read that running in the upper 110 to 120 range(depending of course on the event) for extended period of time can result in major damage!!! If you notice that your temp rang is around this area while doing normal driving, major TLC in is order!!!!
I have ordered a Fluidyne from a vendor on Ebay shipped for $400 and hopefully, I'll be running in the 80--85 range while in light traffic!!!!!! OEM RADIATOR=POS

 

The OEM radiator is pretty good ..... until it busts. then it's a POS.

 

now rocking the Fluidyne radiator!!!!! On a hot day with the A/C blasting i dont even break 89c.
thanks guys for all your input
BTW. direct replacement 1.5 hours for the install. No cutting no glue no duck tap was required!!!!!

 

Great to hear man! I'm definitely going to be picking one of these up in the near future.

 

Check this one out at mazdatrix
3-Pass Heavy Duty version of the Koyo radiator above. This heavy duty version has a lower fin count for improved air flow through the radiator and is a three pass system for even greater cooling efficiency.
Part Number R1443NKO

 

I have never dealt with nor know anyone using a multi pass, I would imagine that it must perform at a different rate obviously. However from my readings and research, the most important factor is capacity of the core and surface space. So i don't know how the triple or multi pass would has a lower operating temp or rather be cooler with having the same amount of surface space???.