Gtr Arc Intercoolers

[SiR_RB]

Hey fellas

I've got an ARC front mount intercooler on my r32 gtr, I'm in the process of changing/upgrading afew parts to get it ready for its tune at the end of the month...

Were looking at pushing 450+kw on e85 and a 6266, so I'm wondering if the ARC intercooler would be a problem seeing as it's only 70mm thick? Would it be benifical to upgrade to a 100mm jap core or keep it?

[scotty nm35]

I am sure it would get there, but obviously it would be restrictive. Why don't you try it out before dropping the coin on an expensive drag cooler.

[GTRPSI]

Im not sure about 70mm but it does sound a little narrow for your power goal, then again ARC are one of the best coolers.

I would be considering a good brand 100mm to take that part out of the equation, nothing worse than realizing after all the work that you have a pressure drop across the ends.

Im sure you would get good money for it to put towards something a little freer flowing.

You may need to trim a bit of the front bar opening a little to make the thicker 100mm cooler fit, we needed to with our cooling pro one from just jap that we sold not long ago to change for a better brand due to a engine power upgrade.

[GTSBoy]

You could always hook up a dP gauge across the cooler you have at the power level you have now. Give it a run and see how much drop there is across it. Should give you (or one of us) a feel for how much it might increase to at your target flow.

Remember, if the new power level comes at a significant increase in boost pressure, that you get some of the extra capacity for free, from a pressure drop point of view, because the velocity increase through the tubes is not as great as simply scaling up the power level. The pressure drop pretty much scales with v^2 and also linearly with density. So if we're given the relevant before and after numbers we can get pretty close.

[SiR_RB]

I've had afew offers for it already, so may possibly upgrade, just not a fan of hacking into the front bar to make it fit

[GTRPSI]

Ah, its just a trim, you wont notice it, go slow and steady with a small hand grinder with a thin blade.

[portaz]

It's not much trimming I used a dremmel and just went slow