Why does no one do a cold air intake and a turbo? It appears that maybe the Disco Potato does but most the pictures have the air filter in the engine compartment. If it is purely packaging then I understand. I do think I would like to try this with a T28 setup in the near future. Idea: Place filter in the driver wheel area, place MAF next to battery, run the intake around battery and then down to the turbo with some 90’s, run pipe out the turbo under the radiator to the intercooler from the intercooler up to the TB at a 45 to the ground. All the piping after the turbo is similar to the piping runs pictured in “turbo DE scares V8's” in the turbo forum. Also, How would this sound?

from what I know, I don't think Cold Air works at all with the turbo.. I think it's because the air is going to get heated up anyway with the turbo... and if you use an intercooler the intercooler [should] cool down the air... I don't think it makes a difference power wise to use a cold or warm air intake... and since it's no difference then it would be better to use a warm air so that you avoid the possibility of going through a puddle and hydrolocking your engine

A cold air will still help with turbos. If you're running around 7psi on a t25, the turbo will heat up the air about 70 degrees regardless of where you start from. So the lower you start, the lower it'll end up, and the lower it'll be after the intercooler.

A lot of guys have the filter placed down low and in front, like in front of the tranny.

Khiem

I'm doin' it and it works great!!!
http://et.byu.edu/~rpt/pictures/NewEngine1.jpg
http://et.byu.edu/~rpt/pictures/NewEngine4.jpg

Ok, I stand corrected, I guess I'm a bit wrong.. maybe I'll be trying to set up a cold air also with my turbo :)

dayum that engine looks sweet
does the valve cover come painted like that?

Thanks, The valve cover is HPC coated Red. the color is very similar to the stock DET read Valve cover, but more brilliant.

Originally posted by sr20detutah
Thanks, The valve cover is HPC coated Red. the color is very similar to the stock DET read Valve cover, but more brilliant.


Wow, just saw you were from Utah. I have heard about your car. :cool:

Looks nice. :D

Give me a break, Cold air intake on a turbo? WTF watching too much fast and the furious are we? The air is going to get heated up regardless if you are running a t25 or a straight T4 Its called friction gents Dont waste your money on something that isn't going to do a damn thing. And if you actually think a Cold air intake will help you out then I have some beach front property in Arizona for sale :rolleyes:

The air is going to get heated up regardless if you are running a t25 or a straight T4 Its called friction gents Don't waste your money on something that isn't going to do a damn thing. [/QUOTE]

It's a well know fact that the colder air you start with the colder it will be by the time it finally goes into the intake. This is not really a new idea. What I am really wondering is why more people don't do it. I guess from the looks of these post its because some people think that the minute you put a intercooler on your car it magically cools the air down to ambient or something. That is far from true. Believe what you want. A cold air intake makes sense from a temperature point of view. To prove my point, answer this question. How many turbo cars run better when it is cold outside then when it is hot? All of them because cold air is denser then hot air.

98sr20de you have the right idea. From an engineering perspective a CAI with a turbo does make sense. I don't know how much difference it makes sense I have never dyno'ed mine "before and after," but the colder you start the colder you will be going out of your turbo and the colder you will be going out of your intercooler. It certainly can't hurt.

I don't know how much difference it makes sense I have never dyno'ed mine "before and after," but the colder you start the colder you will be going out of your turbo and the colder you will be going out of your intercooler. It certainly can't hurt.

And maybe it is such a small difference that most people just don't bother. Kind makes you wonder because you spend 4-7K on a turbo and stuff and then don't go the extra mile in elbow grease. Wouldn't cost much more is what I mean. Love the look of that White car. Are you the one who beat that Viper.

Steve

Originally posted by 98sr20de


Wouldn't cost much more is what I mean. Love the look of that White car. Are you the one who beat that Viper.

Steve

That's what I'm saying. No I haven't beat a viper. wish I could. I have beat a cobra and some F-150 lightnings though.

To prove my point, answer this question. How many turbo cars run better when it is cold outside then when it is hot? All of them because cold air is denser then hot air. [/B]

Sure I'll answer this question, colder air is more dense if you are running a car with an intercooler on a colder day your intercooler has a higher rate of cooling efficiency then on a hot day. On a hot day you run the chance of getting heat soaked because the air going INTO the intercooler is already hot air so you are really not getting as much cooling as on a cold day. It has nothign to do with what type of Intake you have. Thats why on 110 days in cali you run the risk of over heating so badley. I have my intake inside my engine bay sucking up all that hot air, but when I touch the IC pipe after the intercooler it gets so cold at times it has condensation on it, but you know what believe what you want about your CAI theory because thats all it is, a theory, the fact remains it doesn't matter if you have a CAI or a filter on the intake part of your turbo, the air is gonna get heated to a specific degree due to the friction. This is not an NA car that has the air go straight from the intake into the intake manifold, this is a turbo that causes friction which inturn causes heat which makes the air HOT which is then cooled by the Intercooler. Damn Reality is so fun.

PS

Utah that is a beautiful engine bay :cool:

. On a hot day you run the chance of getting heat soaked because the air going INTO the intercooler is already hot air so you are really not getting as much cooling as on a cold day. It has nothign to do with what type of Intake you have.

So are you saying a non-intercooled car won't run better when it's cold outside. Several SCC project cars have cold air intakes (RX7 and Imrezza) and they are both intercooled. I think the RX7 has a cold air intake from the start but am not sure. Kind of makes you think that I am not the only one who thinks this might help. Guess what. They both did it way before Fast and Furious came out.

Actually, the compression of the air heats it up more than the friction in the turbo.

PV=nRT

Ideal gas law.

You've got to put your intake filter somewhere, I don't see why you wouldn't start with the coldest air possible if you can. I also agree that it wouldn't help all that much, as the darn air gets heated so much as it is compressed. But that is why we have the miracle of the front mount intercooler, right?

Originally posted by Driven97

You've got to put your intake filter somewhere, I don't see why you wouldn't start with the coldest air possible if you can. I also agree that it wouldn't help all that much, as the darn air gets heated so much as it is compressed. But that is why we have the miracle of the front mount intercooler, right?

I agree 100%. When I did my swap and had to put my filter somewhere I decided that I might as well keep my CAI. I already had Place Racing's CAI and all I had to do was twist it and weld on a short section and wal la!

all I can say is use your engineering intuitives: turbine likes cold air and so does engine.

if the delta T across the turbine is colder with a CAI than without a CAI, then the former is healthy.:D

to elaborate: with CAI - CAI inlet temp is, say 10 degrees Celsius, ie engine bay temperature, across the compressor and due to friction, the air temp is now say 20 degrees Celsius. Across the IC the air temp, say is cooled to 1 degree Celsius due to IC functionality plus atmospheric temp hitting onto the IC. So the temp reaching the turbine is 1 degree Celsius as opposed to a hotter temperature without a CAI.

Is this practical and worth the efforts considering the delta temp between having a CAI and not is minimal? I don't know.

E=MC2 Whatta ya think?? Made it up myself!!:p
Not sure what it does for heat in the engine bay, but hey...