Cold Air Induction

[TheJeanyus]

Originally Posted by 93Cobra#2771

Is it the bigger piping giving the increase in boost, or simply the elimination of the stock airbox giving the increase?

Elimination of stock air box and placing the filter in the fender well instead of the engine compartment.

[mj_8]

i think the bigger piping has something to do with it. I mean more air coming in means more power if you have the fuel to couple with it right?

[QWKSNKE]

Originally Posted by mj_8

i think the bigger piping has something to do with it. I mean more air coming in means more power if you have the fuel to couple with it right?

yeah on a blower car if your piping size is a restriction (stock for instance) then increasing the size will make more power

[93Cobra#2771]

Originally Posted by TheJeanyus

Elimination of stock air box and placing the filter in the fender well instead of the engine compartment.

That's what I was getting at. Metal or plastic, it doesn't make any difference in power. On stock 03/04 cars, the airbox itself is probably most of the restriction. Modded cars, the stock inlet tubing/MAF is prob the restriction.


Now before everyone reams me on the metal conducting all the heat, etc, consider this - I have datalogs showing before and after my AFM powerpipe vs my March Ram Air kit I had on my previous car. Specifically, IAC datalogs. No difference in IAC temps on stock plastic vs. the metal pipe.

Theories abound as to why the temp change is the same, but most think it is due to air flowing through the pipe SO fast that it doesn't have time to transfer the heat energy from the pipe.

Anyhow, that's my .02 cents worth. I say go for the bling.

[QWKSNKE]

Originally Posted by 93Cobra#2771

Theories abound as to why the temp change is the same, but most think it is due to air flowing through the pipe SO fast that it doesn't have time to transfer the heat energy from the pipe.

I believe that.

[93Cobra#2771]

Originally Posted by QWKSNKE

yeah on a blower car if your piping size is a restriction (stock for instance) then increasing the size will make more power

Yep. It HAS to be a restriction before it will make more power (or more boost). Then, there is a point where more airflow will not increase the power output due to a restriction elsewhere, whether it be heads/exhaust/efficiency of the blower...

[Italian LX]

Originally Posted by 93Cobra#2771

Theories abound as to why the temp change is the same, but most think it is due to air flowing through the pipe SO fast that it doesn't have time to transfer the heat energy from the pipe.

I think it has more to do with the fact that any temperature difference would be quickly equalized by the 3' of hot intake manifold that it has to run through before it gets to the ACT sensor.

[86GT]

Originally Posted by 93Cobra#2771

Now before everyone reams me on the metal conducting all the heat, etc, consider this - I have datalogs showing before and after my AFM powerpipe vs my March Ram Air kit I had on my previous car. Specifically, IAC datalogs. No difference in IAC temps on stock plastic vs. the metal pipe.

Theories abound as to why the temp change is the same, but most think it is due to air flowing through the pipe SO fast that it doesn't have time to transfer the heat energy from the pipe.

Anyhow, that's my .02 cents worth. I say go for the bling.

My two cents is that there is a differece in the metal and plastic at an idle. I have a few datalogs from my stock setup on an 86 mustang all the way down to the stock air box. I also compared them to my setup that had a MAC fender metal cold air system.

The result was that at an idle the ACT was higher on the MAC system, but when cruising the ACT was a little less on the MAC. I then used the stock tubing to goto the MAC fender and saw that the idle temp was back to stock and the cruise temp was also down slightly more than the complete MAC system.

This was all done on a fox body.

[QWKSNKE]

Originally Posted by Italian LX

I think it has more to do with the fact that any temperature difference would be quickly equalized by the 3' of hot intake manifold that it has to run through before it gets to the ACT sensor.

That only applies to foxes. Pretty sure all sn95's have the ACT in the CAI pipe

[Italian LX]

Originally Posted by QWKSNKE

That only applies to foxes. Pretty sure all sn95's have the ACT in the CAI pipe

I know... but my reply was to Richard who's test was based off of a fox-body. :P