GT500 Radiator

[DB83]

Anyone know if the the GT500 uses a larger radiator than the GTPP/GT350 radiator? If so, is it a direct swap to the GTPP?

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[Ewheels]

Following for info.

 

[EFI]

Did you ever get anymore info on this? I'm looking to swap out the base GT rad and was initially going to go with the 350/PP unit but it would be awesome if the 500 one was better but still fit.

 

[wingnutt]

If you want better, Mishimoto is the way to go…had to put my 350R radiator on a shelf once I added the ProCharger, the stocker just couldn’t keep up

https://www.amazon.com/Mishimoto-MM...ishimoto+radiator+gt350&qid=1748922007&sr=8-1

 

[EFI]

If you want better, Mishimoto is the way to go

I ran that for about a year and several track days, saw about the same temps as with the OEM unit. Certainly wasn't a big improvement, marginal at best. That's why I'm looking for a true upgrade and was hoping to stay with OEM reliability hence looking into the 500 unit if it's any different/better.

 

[GTP]

I am on OEM PP radiator. Extra oil cooler. I drained 1 gallon of coolant and replaced it with 1 gallon distilled water. I think that helped a little.

Even better would be 100% water with two bottles of Water Wetter, but I wouldn't do that in cold climate location.

 

[wingnutt]

I ran that for about a year and several track days, saw about the same temps as with the OEM unit. Certainly wasn't a big improvement, marginal at best. That's why I'm looking for a true upgrade and was hoping to stay with OEM reliability hence looking into the 500 unit if it's any different/better.

gotcha! for me, running hard in the 100+ degree days with the big intercooler, the stocker just couldn’t pull it off…got the dreaded wrench with ECT, CHT and limp mode warnings, but the Mishy fixed all that

 

[EFI]

got the dreaded wrench with ECT, CHT and limp mode warnings, but the Mishy fixed all that

I never got those perse, just hitting some "soft" limits that I have in my head for what is safe or not. So maybe I just wasn't pushing the Mishi enough to see a difference, and at my levels of comfort both produced the same result.

What temps were you hitting before and after?

 

[wingnutt]

What temps were you hitting before and after?

I honestly have no idea…watched everything like a hawk for the first thousand miles but failed to realize that was springtime. Fired up to come home one of the first 100+ days, found a turbo SS to mess with along the way, and whammo

 

[galaxy]

I have the Mishi also. I think sometimes the benefits of a bigger, more capable radiator may be misunderstood. Correct, you're not going to see cooler temps, but you will see not as hot of temps, and more stability. For me, post tune, I know this - my cooling fans would kick on high (100%) when needed; traffic, stop-and-go, long periods of idle, etc. Now with my Mishi, I have yet to hear my fans run on high in same conditions. Such has been my experience anyways. My fans kick on low (60% I believe) and my CHT's do not move. YMMV.

 

[EFI]

you're not going to see cooler temps, but you will see not as hot of temps, and more stability.

I wasn't talking about cooler temps on the street as those are kinda moot. With both radiators I was seeing 192-196 CHTs while cruising so you're correct no cooler temps because they're ultimately limited by the thermostat. But on track, they both maxed out around 237-240 in similar temps so was seeing just as high CHTs with both.

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