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2004+ gtp fwi

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donkason

New member
I have searched high and low for the answer to this and I found enough to give me more questions, so here we go. I have a 2004 GTP that I am/was going to do a fender well intake for. I looked over the writeup on how to do it, bought the parts from Lowes, and when I popped my hood I realized that the writeup was for a 2003 or older. I have a 3in MAF sensor to negotiate with. So this one might take a little of my hillbilly engineering if I don't get some guidance:th_winking:

I originally thought of just putting a 3in-4in coupler off the end of the MAF and running 4in tubing into the fender well with a filter and cutting out my fender well bracket to make room for the whole thing. However, it seems like it may be a waste of time to run 4in tubing into 3 in MAF into a factory 3 in corrugated section with elbows. From some of the research I've done folks are saying by the time the air reaches the 3in section and gets run through the corrugated elbows it disturbs and slows air flow enough to mitigate the benefit of the cold air and the 4 in pipe preceding it.

The alternative is to run a cone off the MAF but I'm not a fan of sucking in hot air and it looks to me like the factory air box would be taking in colder air than an open cone.

I'd like to do the FWI the right way, buried in the fender, out of the engine bay, sucking the coldest air possible. Has anybody done one of these and successfully incorporated the MAF into the system while still maintaining 4in tubing throughout most of the intake.

I'm not set on any one way yet so I'm completely open to suggestions and ideas.

I was thinking a 3in to 3in coupler right off the TB to hook into the MAF. Then running a 3in to 4in coupler off the MAF into a 4 in elbow and down into the fender.

Let me know what you good folks think:)
 


dont worry about hot or cold air, its does not make a difference really. Maybe 1 hp different from hot and cold air.

The colder air will reduce gas mileage and the fact that its stuffed in the fender will cause the filter to be covered in water and dirt 10x faster than a intake system thats in the engine bay.

Just make the intake go to right in behind the headlight next to the inner fender. You can get a small amout of colder air and hot air and then not have to worry about sucking in water and dirt.
 
cold air means better power but an open cone or short ram means better flow

i always opt for better flow especially on a supercharged car because your goal is to get the air in and out as fast as possible with minimal restriction
 
By the time my factory tube off the TB and the MAF are factored in it's about a 3 inches from the fender well opening. I'm just going to run an extra 3 inch piece of tube and place the head of the filter right at the fender opening. It makes the most sense to me after hearing what you everybody has said as well as the HAI vs. FWI thread mentioned above. It also saves me cutting and grinding out my fender brackets. It looks like a PITA.

After looking at it for a while I thought about boxing the filter in to isolate it from heat as best I could. I would cut out the roof flashing to fit where the factory tray sat for one wall behind the filter. I would use a flat piece of plastic to make a top for it. The filter would then sit inside the engine bay, have some insulation from heat behind it, be protected from debris and moisture, have the fender well hole and the headlight opening providing cooler air. It seems like a win/win to me.

Has anybody done one like this before?
 


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