there are only three in my mind... that would be nisei... arc and greddy rspec. high density is referring to the amount of fins inside the transfer tubes... the transfer tubes are the tubes that take the heat away.

bascially the arc is a high density louvred square fin design. however it is a tube fin design which makes it very light.

the greddy rspec is the same but it has louvred fins that are less squared at the end. both are very very light.

the nisei is probably the ultimate in cooling. it's square fin high denstiy design gives you little (not registerable) pressure drop and it will take all the heat you can throw at it.

i was told by rob in a pm that the br core they tested (the deluxe) ended up having about 20 degrees more on intake temps over the nisei. so that is no longer on my hotlist. the ams... i will maintain mimicks the stock geometry and is not ideal.

 

good to see some test were done

 

wow that's interesting. Ive been debating on which intercooler to buy too. Thanks for the info

 

I still want to know how the Nisei affects spool up on the stock turbo. Be aware that gt40 has a much larger turbo than stock. How does the Nisei work with the stocker? A part of me feels like it's a little too big. Feel free to point out how I'm wrong.

 

Is their a maximum volume that the intercooler can have before a strong pressure drop occurs with the 16G? Im sure their has to be formulas for this

 

There is no loss in spool up with the stock turbo and the Nisei intercooler. If you do search for the Nisei intercooler of alot of your question will be answered.

https://www.evolutionm.net/forums/sh...ighlight=nisei

 

i believe rob is running the stocker... he reports (with two hks gauges) no registerable drop off... and mark also notices no drop off... but he's been havin' boost leaks everywhere.

the thing is using a volume measurement is deceiving... cuz the inside of the cooler is packed with fins that take up volume. the nisei is huge... the biggest on the market... but it has so many transfer tubes, and hence so many cooling tubes, PLUS a ton of fins... that the volume inside is quite small. and it's not very restrictive because tehy didn't louvre their fins... but the cooling efficiency is maintained because they used square finning.

 

I did a search, and most of the info I found were guys not running stock turbos. This answers some of my questions, though:

"the inside of the cooler is packed with fins that take up volume"