I’m gearing up for this seasons time trial / track season and I need to find the best parts for my Evo’s cooling and reliability. I loose power mid session and near the end of the day… so I need to either upgrade my intercooler / pipes / jet hot coat the manifold / better radiator…. So on. Right now my cooling system is stock… Please list your secrets. I would like advice from track junkies and people with experience running hard for 20+ min sessions.

Also... people told me my greddy type-s bov might need a bigger spring or something.

Thanks…

Me too!

also, is there any way to add a second oil cooler to the EVO?

Well,

I did over 10 track days last year and here is what I would recommend

1- better radiator.
2- better cooling water including water wetter from Redline.
3- brake cooling guides.
4- taking the front tag off when racing.


Any thing else like Intercooler and so on might drop your psi pressure and you loose throttle response and power.

Which radiator qualifies as better?

Even though I only autox, it gets really hot here in TX and I would like to better protect my engine.

A "track trick" I've been told that turning your AC Heater transfers heat from the engine bay into the cabin among other things... maybe just a prank to get me to roast myself, but it kind of makes sense...

A ralliart(or other brand) thermostat that opens at a cooler water temp is good too!

the BIG pwr radiator would help.

heat wrap DP.

coat manifold & 02.

run straight distilled water & RL water wetter.

get oil temp & water temp guage and start monitoring your temps.

good luck!!

n

fully ceramic coated TBE (manifold to downpipe)

Nils I was hoping you would post... it seems like you take your track ride seriously. Did you do all of the above? and have you experienced any power loss on warm days and hard driving?

don't turn the ac on, but turn the heat up as high as you can with the fan on... basically, it serves as another radiator, to dissapate heat.

I run a 70/30 mix (distilled water/antifreeze) with wetter.

Try not to ride the guy in front of you's ***. Honestly, It may just be me, but you wouldn't believe the temp drop you get from braking in a seperate line, on a long high speed stretch.

turn down the boost a click or two. Top hp isn't what gets you around the track, it's the best line, and usage of the brakes.

granted, a bigger radiator would help, as would an upgraded oil cooler. The problem is, i get my brakes and tires hotter than anything, i've never seen over 205 F (water) or 125 C (oil) on track, and taking a straight or two easy brings the oil down to 100-105 rather quick.

All of that said, i think when i do a turbo swap, i'm seriously going to consider jet coating the manifold/dp at least.

Heat is a huge problem where I live. Yes, I experienced power loss, specially when stock. The big PWR radiator helped out a lot, I just built a custom duct for my stock oil cooler which seemed to help me out last time.

I am hoping with coated manifold & 02 that underhood temps will go down even further.

I have had some parts on car for a while and some are going on the car right now, but yeah, heat is a problem and always will be with turbo car.

n

I really recomend Jet Hot coating any pipes... I coated my headers and exhaust on my Ultima GTR and dropped the water temps by 25 degrees. I want to do it with the evo but its a pain in the *** to remove the manifold and dp.

yea,

theres ways to put up a second oil cooler, and even a third oil cooler in EVO. Lots trackies in asia have this kind of setup due to high temp year round.
the only problem is modifications and creativity that gets kinda tough.

but in US, changing the stock oil cooler to a bigger one will usually solve the oil temp problem.....but once again, I live in NW, and it rarely gets over 85 degrees during summer.

Here's the only half decent thread I could find about track worthy oil coolers. The RRE OC looks impressive, but airflow to your front right brakes would be nothing but hot air.

https://www.evolutionm.net/forums/sh...ght=oil+cooler

hey, think of it as a quick warmup for your brakes.

When i'd come in after hot sessions, on a short clockwise course (1.6 miles), my right front was always one psi higher than the left (which should have been hotter).

I can only attribute it to either a slight bit of jumping in a hard right hand corner, and spinning the inside wheel, or the stock oil cooler pre-baking my cooling air. (ding ding ding).