nickk47

Ok, I've been wondering this for a while and it's quite a noobish question. Is a Radiator Breather Tank same as Air Separation Tank? From the pics, I can see that they're almost identical, but I just want to make sure. Oh and if I were to get a GReddy intercooler, would the stock mount be better or the front mount? Which is better for a daily driven and sometimes a drifting car ?(Not a H-Core drifter, just once a month thing)

Rx7_Nut13B

iTrader: (1)

Well the air separator is pressurized with the system, water/air in - water only out. The radiator breather if mounted high up will do the same thing.

Front mount = More Hp, More Heat in the motor
Stock Mount = Less Hp, Less Heat in the motor

No matter witch direction you go, make sure you have VERY GOOD DUCTING

nickk47

All right thanks for the info!

dgeesaman

iTrader: (7)

The deal with FMIC's is time. You can put a huge front mount on a car and as long as you're not running it under heavy load for a long time, you'll get maximum intercooling without running up your coolant and oil temps. So clearly that's why it's so popular for drag racing.

For drifting and daily driving, I would not compromise cooling system efficiency. If you're not trying to make massive power, a good stock mount works great. It's good for daily driving, drifting, and track use. If you want more power, a V-mount will allow more of the same.

I'd like to reinforce what RX7-nut13B already pointed out - you're only as good as your ducting. Even a perfectly stock FD has some leakage paths that can be sealed up to improve the system.

Dave

nickk47

Is there some sort of document that I can look up on how to seal up the leakage paths?

dgeesaman

iTrader: (7)

I don't know of one. There are old threads you can search up, but basically it boils down to closing all leak paths between the front of the radiator and the opening in the bumper. I used open-cell foam. Also be sure to replace the foam between the undertray and radiator if it's dried out.

Dave

nickk47

Thanks for the info!

joshrulz

with the air seperation, why is it that seires 4s have the cap/overflow line at the highest point in the system - thermostat housing. yet series 5's just have the cap and line off the radiator, should s5's have a place to bleed the air at the highest point when filling up with water?