Intercooler

[Trex]

Aren't xr6 coolers taller, therefore giving more surface area for the incoming charge. Skylines are pretty much limited to 300 mm tall.

Yes fg are nearly as tall as the radiator. Ba/bf still get decent gains with a bigger cooler when over 250kw depending on the setup.

[MrStabby]

Pretty easy to measure both temp and/or pressure drops after a couple runs up the rollers.

What kit would you use to do the measurements, and how would you install it?

[R31Nismoid]

A lot of tuners have a simple sensor you can weld a bung on to attach and done. Cost maybe $50 for the bung welded and use whatever they already use

Handy to have IMO, especially if you wanna play around with a setup a bit.

[GTRPSI]

Years ago my son got a Just Jap cooler for our GTR in 100mm, the biggest issue we had back then was the side brackets had to be cut, repositioned and welded which was a unseen (by him) cost, unsure if the current ones have this done correctly. (That was for the R32 GTR cooling Pro coolers)

Front bar on the R32 needed to be cut out about 20 or so mm to fit it back on.

In our case the OEM cooler was simply tired looking but flowed more than enough for what he had, our thoughts back then was that being an extra inch thicker it wouldn't add restriction but we never assumed it would improve over the OEM R32 GTR cooler, the OEM ones are known to be used on over 400Kw builds without issue.

As nismoid mentioned, its no big deal to add the bungs and take some measurements so you have some facts at hand when playing around with setup.