exklusiv2

Pictures and a description of what was used and involved would be great.

ThetaTau87

Keep the factory air box. It already has a cold air intake duct. You could add some holes to the bottom of the box, but you probably won't improve on the OEM design.

A cone filter will just suck up hot air from the engine compartment.

Chapel

kinda sounds nice though... had one on my Saab Aero, made a big difference in sound, but it was a true CAI. It mounted down in the fender and had a feed from the front bumper
Mostly just extra noise from the turbo though. I'll probably leave my stock air box on with an OEM air filter. I don't trust K&Ns.

UrSobsessed

If you are thinking of K&N, be careful as the oil on the filter media coats the wires of the MAF over time and can cause weird stuff to happen.

Unless you are going really big horsepower, the stock box is the best.

Big HP guys can correct me here...

exklusiv2

I drilled some holes in the bottom half of the air box. Seems to have made the problem a bit better.

UrS4boy

Drilling the air box = letting in hot air = bad idea. Look for your restriction somewhere else, like your intercooler.

UrS4boy

I think the answer = hot = bad idea = leave the air box alone or add a new snorkel to it using the oil cooler duct.

exklusiv2

x

UrS4boy

Then find the article on the internet: Negative Boost.

Chapel

agreed. Swiss cheesing an airbox that sits THAT close to the biggest heat generator in the engine bay is not a good idea.

Just be glad you don't have an old non-crossflow head with a carburetter sitting on top of the headers... that **** was mental to get running consistently. big set of twin 40mm DellOrtos sucking hot air and the float bowls just getting boiled off. totally mental.

I wouldn't mind fabricating a carbon fibre airbox... with optimized flow... but for the most part, the air box doesn't really restrict the turbocharger. Your bottleneck is going to occur mostly AFTER the air is compressed: intercooler piping, intercooler end tanks, intake manifold and intake ports

Also, if you can properly cool the air after the compressor (big Air to Air intercooler, air to water intercooler [the best, IMO] water/alcohol injection) you can suck air right off the hottest portion with just a tea strainer over the intake...
The problem with these cars is the fact that there's a 180° elbow right off the turbo.

I'd love to get a nice big Air/Water chargecooler in my car. It's brilliant at reducing charged air temps.

but, yeah, swiss cheesing an airbox isn't going to do you any good

oh, wait, you got a GT3071R on this car? hmm, work on the air cooling POST compressor as I was talking about. With the flow rates of that turbo, you might be better off fabbing up a metal box and doing a big *** cone filter or finding some room in the fender or low in the bumper to put it. Just watch out for big puddles.

I mean, my friend is making over 1000whp in his Supra with this:


not a 'CAI' at all. and he's just got an AirAir cooler.