Well I have been doing some datalogging with my OBD II scanner and I have noticed a significant higher temp with the filter kit. Now my question is, where does the ecu read the temperature from. Because if it is at the MAF than this point is mute, because the air gets cooled by the FMIC. But if in fact the ecu is reading the charge temp post FMIC or at the TB than this might be of a little concern (or at least some attention)

FYI...after beating on it and than leaving the car on for about 10 minutes the air temp rose to 114F. At this point I popped the hood and felt the Intake tube and intake manifold, and there is NO way they where near 114F. So my conclusion is the ecu is taking the reading from the MAF, which in this case the air intake Temp will not make a difference.

 

It's reporting the air temp from the MAF, pre-turbo. And even though you're running an intercooler, it's still an important item to keep an eye on. I'm actually wondering if these open airfilters are even a good idea on the EVO. What you're doing is sucking in hot underhood temps instead of the air provided from the front of the car. Doesn't seem right to me. The results will be just what you're reporting; noticeably higher intake temps.

That higher temperature air is fed into the turbo to start the whole boosting process. The result is even HIGHER temps coming out of the compressor housing and more work for your intercooler. The intercooler might handle most situations fine, but you have definitely moved the breaking down point a little closer.

I understand many shops have reported a slight HP gain when installing the open filter, but I bet these tests were done on a dyno with the hood wide open. Not exactly the way I normally drive my EVO. I'd rather see a re-routing mod done along with the open filter. I understand the potential gains to be had from removing the stock airbox and some of the plumbing leading to it, but the increase in intake temps probably negates a good bit of that gain, IMHO.

Thomas Dorris

 

As well as loosing cooler air coming in from outside the vehicle, it seems to me that the factory intake on the Evo may supply a little pressure to the intake air too at high speed ( ie RAM air ). It would be interesting to get a pressure sensor on there and see if there really is any pressure build up at speed.

I've also noticed pics on a rally Evo ??? having the intake fully exposed to the front of the car, which I presume would give a more direct path into the airbox for better RAM air effect. ??

 

Thanks folks....but if you really think about it, the Delta T is soooo high after the compressor housing that it seems that such a small increase in temp would make little difference.

BTW....i have seen many turbo cars with their filters in the engine bay...i am just a little weary putting a filter that is under alot more vacuum than a NA car near the front bumper.

To each his own.....I appreciate the response peps.