I have the PP2 with the big mouth. It works good.
I remembered this post and wanted to thank you for the idea. I also wanted to add that a coping saw (usually under $10) makes cutting the back off very easy. A sanding block and razor blade took care of the rest.Thanks Mike.
First I tried a flush trim router but ended up marking one of the hexes, thankfully it's only a minor blemish.
Next I tried a Dremel type tool. This was quite tedious and wasn't giving the finish I wanted. Props to those who persevered and did a clean job.
I made an executive decision and carefully hacksawed the back off. The flexible blade hacksaw followed the back plate as can be seen by all the cut marks in the photo. Then I filed and finished with a cork block and sand paper.
I removed about 3 millimetres (1/8 inch) in total.
I believe this last method does give the best finish as there is no risk to damaging the inside of the hexes.
Yes there are quantifiable gains related to both IATs as well as mass flow at speed. IAT rise is reduced considerably, and the direct feed to the airbox actually creates some ram air at speed. I'll find some of the data posted by users after I go back through and find it.
The GT350 inlet doesnt line up too well to the big mouth. It can be done, but will take some ingenuity. I know a few customers reported back that the GT350 inlet is considerably smaller than the big mouth.
I got mine because every now and then I get caught in traffic. My intake temps have been greatly reduced since the install, I’m in South Texas so it gets warm.
You'll see much lower temps when in traffic with this
