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Have you driven it with the CAI kit installed? I made a set for my 955 but it ended up performing worse. I have a Softronic tune so I contacted Scott and he said to go back to stock airboxes because CAI doesn't work for several reasons. It ended up cutting the boost in half or less for some reason. He didn't elaborate and it makes no sense to me but I've seen it. Just a thought.
I put the stock boxes back in this last weekend.
The short of it is that this is just another bad product made to separate you from your money with a misleading name. There is nothing cold air about this situation. The filter is buried behind the wheel well liner and has no choice but to suck HOT air from the engine compartment. When the IAT's shoot up knock threshold is reduced and so is boost accordingly. Like most Factory VAG intercooler setups, the intercooling is already inadequete. With the stock setup the filters are getting air from the coolest part of the vehicle. There are two tubes in FRONT of the radiator core support to each side of the radiator, right behind that big *** hole in the middle of the front bumper. If you were to seal off the CAI filter from the engine compartment all together and cut a hole in the wheel well liner you could improve the temps a lot. But, it still wont be as cool as the factory location.
Could the Cayenne benefit from less of a pressure differential in the turbocharger intake tract? Absolutely. Is there a cooler place to get that air from than the factory location? I sure can't think of one.
JD, if you were to have put some 100 octane in your PIG before removing the CAI's you probably would have seen your boost come back. However, even though the octane would have raised your knock threshold, the hotter air from the CAI's would have negated the gains. Cold air is free, octane isn't.
On my build I wont be able to use the stock air boxes and they take up a ton of room. I have a plan to build new housings for the Larger air filters, MAF's, and intake tubes. But, I will still be pulling COLD and PRESSURIZED air from near the factory locations right behind that big *** hole in the front bumper.
Last edited by Mr. Haney; Jul 1, 2017 at 12:44 AM.
The short of it is that this is just another bad product made to separate you from your money with a misleading name. There is nothing cold air about this situation. The filter is buried behind the wheel well liner and has no choice but to suck HOT air from the engine compartment. When the IAT's shoot up knock threshold is reduced and so is boost accordingly. Like most Factory VAG intercooler setups, the intercooling is already inadequete. With the stock setup the filters are getting air from the coolest part of the vehicle. There are two tubes in FRONT of the radiator core support to each side of the radiator, right behind that big *** hole in the middle of the front bumper. If you were to seal off the CAI filter from the engine compartment all together and cut a hole in the wheel well liner you could improve the temps a lot. But, it still wont be as cool as the factory location.
Could the Cayenne benefit from less of a pressure differential in the turbocharger intake tract? Absolutely. Is there a cooler place to get that air from than the factory location? I sure can't think of one.
JD, if you were to have put some 100 octane in your PIG before removing the CAI's you probably would have seen your boost come back. However, even though the octane would have raised your knock threshold, the hotter air from the CAI's would have negated the gains. Cold air is free, octane isn't.
On my build I wont be able to use the stock air boxes and they take up a ton of room. I have a plan to build new housings for the Larger air filters, MAF's, and intake tubes. But, I will still be pulling COLD and PRESSURIZED air from near the factory locations right behind that big *** hole in the front bumper.
But the hose/tube coming from the front end dumps right on the filters the way I had it set up. I also have a P3 gauge and when I first swapped it to the CAI I checked the IAT's and didn't see where it was any warmer than average with the stock box. I can't imagine that is the only reason. There's something else going on that I'm not getting. The parts I used increased the filter surface quite a bit.
But the proof is in the puddin. It's taking a bit but the boost is slowly coming back up as the computer learns again. I should have swapped the stock boxes back in sooner but just didn't have time.
Petza's CTT looks great and I don't want to hijack This Thread too much he's definitely doing it right. Try unplugging your mass air flow meters and you should get all the Boost that Scott wrote you for.
Quick update - body work continues and they about have the rear bumper completed. Since it's going to be one color on our car, rather than having the lower section a black or CF look (which I think then makes the rear bumper then look too narrow), we decided to bond the 2 sections together once the fitment work was completed.
Looks like this now and is just about ready for primer.
They're also working on the front bumper to front fender transition and are going to have to build up then reshape the curve of the front bumper to make an even panel gap.
Sorry, been busy with work travel, updating the sound system in my 997, and attending Okteenerfest (914 gathering in Helen, GA). Progress continues though - they've jammed out the car, painted a couple of the doors, are doing final sanding of the rear quarters and have begun work on getting the front bumper to marry up to the hood they way it needs to look. The hood marries to the fenders and headlights nicely on both sides, but the center of the front bumper is low, so they're probably going to have to internally brace it up and do a little building up of the center section so it meets the hood smoothly, then we should be very close to doing the exterior respray. I think we're still about a month out.
Why can't they do a bolt on kit like this? What a mission but it does look amazing the detail to line it up and have it look as if it is a factory fitted option.
All 4 interiors of the doors and their door jambs have now been painted and the doors have been reinstalled onto the car.
This weekend they'll be removing and taking care of the rear hatch jam and painting the roof since it's a different reflective surface and doesn't need to be painted at the same time as the rest of the exterior. Then they'll finish the fitment of the front bumper and prep the complete exterior for the final respray. Bumpers and hood will be painted off of the car for completeness of coverage, then reassembled.
Here's the current status. You can see how well the flare pieces line up between the door and rear quarter and also why the stock wheels are being changed out for larger and wider ones since they're too far inset, and though 21s, dwarfed by the aggressive body flares - new wheels are a 22"x12" with 315/30 rubber.
Your wait for "some color" is over....the body shop painted the roof over the weekend - like I said, not a lot but "some". I told them to absolutely not take any of the Pano roof apart and to just mask it off as a large central fixture and paint around it. No way I was going to risk trying to get the complex mechanism installed again and adjusted properly.
They also started disassembling the rear roof spoiler to get it off of the car so all the little channels and layers could be painted properly.
The close-up of the paint is actually on the B-pillar that will be covered up by the satin aluminum trim so don't worry about flaws in it, but it was where I could capture the light the best to really see the color and pearl effect the paint will have.
