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RX-7 3rd Gen Specific (1993-2002) RX-7 1993-2002 Discussion including performance modifications and Technical Support Sections.

 
 
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Old 09-24-2008, 01:27 AM   #1
Brent
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Default Efficiency of "intakes" on turbo cars... your thoughts?

I thought this would be a good discussion. I am referring to where the air filter is located(or draws air from) and not the intake manifold. What are your thoughts about where it should be located and why... and does it really matter? To start with the basics: I know a lot of people think that the concept of drawing air from a place other than the engine bay is worthless because the air is hitting the turbo which is going to be hot and the results will be negligible at best. The intercooler will do the majority of the cooling before it hits the throttle body so it does not matter where the "intake" or filter is located.

I agree that the intercooler is the largest air cooling factor, but does anyone have actual results/documentation about location of the intake?

I am a reliability person which basically means I focus on a couple of things:
1. Temperature Control: (Oil, Water, Air, and fuel) Which all work together to keep engine temps down as a whole.
2. Sufficient Fuel: ie I keep the boost relatively low on my T78(12-14psi)

I also believe that pulling cold/ambient air(unless it is extremely hot outside) is only going to help. However, I would like to know how much. I plan on finding out how much. I am hoping to fabricate what I like to call a "track" intake for my Silver FD for track days. I plan on relocating my AIT to the cold side of the intercooler pipe. I haven't decided where yet... while locating right next to the intercooler on the cold side pipe will tell me exactly how cold the air is coming out of the intercooler, what I really want to know is how cold the air is as it enters the engine(without the AIT being effected by heat soak). I will test my current intake which is basically sitting in the engine bay. I then plan on fabricating a pipe that leads to the front bumper opening, attach a filter, and make a duct out some aluminum and rivets. This obviously isn't practical for street use and would only be used while tracking the car. It will be similar to the Pan Speed Car(only they don't run an air filter). Here are a couple of pictures that are similar to what I'll be making... unless someone shows me evidence that it is completely pointless. As for the rest of the main components of my cooling setup: I run a Pettit CoolCharge III Intercooler, a Koyo N Flo Radiator, and I will be adding a stock passenger side oil cooler as soon as I get home in October.

PanSpeed Time Attack FD's Intake:


You can see the duct at the front passenger side of the bumper:


Jack Mardikian's RX-7 that ran 1:48.5 at Button Willow during the 2007 Super Lap battle, notice filter in bottom left:






__________________
Road Atlanta August 2011 NASA TT 1:33
http://www.youtube.com/watch?v=IFY00PAK_Ps
Traqmate's video of my car from the 2011 UTCC at VIR
http://www.youtube.com/watch?v=2Zcn6...layer_embedded
Video of Yellow LS1 FD at NASA TT at VIR
http://www.youtube.com/watch?v=e6k0lJkcwrM

Last edited by Brent; 09-28-2008 at 08:36 AM..
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