Intercooler

[toygtr]

Hi everyone,

Hope you can help me.

I have a R32 GTR that has 350awkw. I have a built engine and all the good stuff so far and its tuned by Racepace, I had a stock cooler in there but bought a second hand trust one to replace it. Ive straightened all fins and polished it as much as i can, also ive cleaned out the internal of the cooler removing any build up on the inside of oil and the like.

The standard cooler has a core of 600 x 295 x 60. The trust one has a core size of 590 x 290 x 70. I like the trust one because its chrome looking and being thicker should keep my intake temps down better than the standard one (though i know the standard ones work very well already, and can make good power).

The highest boost with the standard one fitted was 1.5bar and now with the trust one fitted it's 1.4bar with just the cooler swap, not touching anything else. Im yet to get the car tuned with the trust cooler fitted. So

Im wondering which cooler should i keep on?

In your opinions which one would be better?

Im thinking when the car goes in for a tune if it doesnt make 350kw again should i ask them to up the boost back to 1.5bar and see what happens?

Thanks for having a look.

[skylinecouple]

Simple, look inside and see for yourself which has bigger/ more tubes. You hear all sorts of opinions about dispelling heat or cooling properties of the equalibrium of the fandangle but really, just look inside. If flow is what your after then you need more tubes of the same size or larger tubes with same amount of them or more. This is also where the thicker verses thin debate comes in because you may not get enough air flow to the radiator. if you go with say, a 100mm thick core. Having said that I haven't heard of too many people overheating with thick cores. At that power level what you have is good with the Trust I am sure, but you really won't know till you try so do it, put it on and tune it. Otherwise 6mths down the track you'll still be wandering.

[R31Nismoid]

^ i disagree with that.

Flow does not great equal cooling, sometimes it can actually hinder it. All depending on the scenario.

Sounds like the factory GTR core perhaps needed a bit of a flush/clean?

Either/or really. They are so near in spec and id imagine cooling/flow wouldn't be majorly different either - so a retune is probably not even required

[skylinecouple]

Absolutely, the faster the air travels through the cooler the less time the cooler has to actually cool it down. The trust cooler of the dimensions given is probably a slightly better bet for flow though. Cooling I would have to say would be near on identical. What size is yours Nismoid ? Have you been tempted to try the 100mm ?

[R31Nismoid]

mine i think is 70mm thick - i will be changing it shortly to 80mm or 85mm i believe, but that's it really. No need to go bigger... plus i can't

My cooler is large, about the size of a radiator being a GTS-R, different spot. Sits directly infront of the radiator

So it has plenty of surface area - no need for massive thickness.

[ARTZ]

Random dribble here

IS it correct that bathurst GTRs ran 2 bar with stock intercoolers?

Also seen metallic green GTS-R in cambellfield a while back, was as nice as any R34 ive seen

[R31Nismoid]

It's not a GTS-R. Its just a HR31 coupe

Gibson IIRC were not using the factort I/C - not even close

[MrR33666]

id stick with the gtr cooler

wont see a huge difference with the very slightly bigger cooler

does the new cooler use the same piping??

if not not worth it.

[toygtr]

Yes the cooler uses the same piping. but ive got HKS hard piping kit on there.

And the standard cooler was cleaned out and all the fins straightened about 6 months ago so it is clean. Checked it when i pulled it off and was oil free in the inside of the standard one.