So I just installed the Pettit Racing Track Pro Cold Air Intake and if I'm correct the picture labeled 1 is also an air pump hose that would normally go into the stock air box. Actually all the circled hoses would go to the stock air box. Is it okay to vent all the locations into the air since there are no connections to the Pettit Racing Air Intake? Is there a way of using any of the connections or just have them all just vent to the air? I know that the cats are not getting the proper air flow, is there a way of connecting them?

Thanks for any feedback

Pettit Racing Air Intake

 

The Petit intake comes with a muffler that goes on the line from No. 1 before venting to atmosphere, otherwise you'll hear an annoying mooing sound. No. 2 sucks in air so should be filtered and sourced from a cool source (back in the 90's Mazda has a TSB about air pump failure from ingesting hot underhood air. The other two can stay open but if the turbos leak oil on the compressor side, they will discharge oil and make a mess.

 

Thanks trout, I got the Trak Pro Cold Air Intake RX7 FD3S before the TKT Cold Air Intake RX7 (On Road) was out or didn't see it before ordering so I don't have that extra pipe and filter. But basically I need to get a tube into No. 2 with a filter and not at the top so I can do that. No. 1 should have a longer pipe and filter connected as well I take. The turbos don't leak at least not yet. It's an all original car and I've been dealing with dried up vacuum lines and just got a v-mount and then ended up having to do a million other things as well.

Thanks for the info!

 

Pettit would probably sell you the extra pieces

 

leaving 3 open will spray hot oil & pressurized air everywhere regardless of leaky turbo seals
the stock pcv valve dumps engine oil into the primary turbo, you must install a catch can now
there is also a theory that 3 can draw unfiltered intake air under high rpm engine deceleration

 

Hmm... that's interesting. Nothing hurts to have a catch can there.. need to read more about that.

 

Good info.

 

Onpopular upinion: K&N filters with a heat shield aren't a cold air intake. A CAI has to actually provide AMBIENT TEMPERATURE AIR to the engine.

The problem is that achieving this requires certain sacrifices with the FD...

E.g., "**** it, I'm going to spend $2,000 on an RE-A fixed headlight kit so my turbo can suck cold air! Who cares if the right headlight barely works!"

Edit: just realized the forum tricked me into posting this in the wrong thread

 

Disagree.
Maybe not my first choice, but with a shield in place and especially if moving and sourcing ambient air from the side of nose of a street-driven car I think it would be an effective enough CAI.
Yes there’s room for improvement and yes sacrifices would have to be made to for that improvement. But the return from the time, money and cosmetics isn’t worth it to the average owner.

 

The pettit k&n filters are too damn big, they like to bounce around & rub
I swapped mine to dual 2.5" go kart filters

 

The old M2 intake i have draws air from below by the frame rail - you remove some foam that was blocking that opening off. iirc the foam is there from the factory to keep the air moving through the radiator. That is true cold air to the intake. It has nipples into the box for the smaller lines. It may be that the kit was shipped with small filters for those?

If you use one of these "heat shield" types and remove the foam, I would guess you get 80 - 90% of the cold air benefit. However, you may lose some cooling efficiency with the air not being directed through the rad.

 

^ Agree.
I don’t even recall having to remove any foam. The gap that feeds air from the nose beside the chassis horn becomes apparent when the stock air box is removed. And much of any air pressure that’s lost at the face of the radiator from opening that area can be made up for by using a little upholstery foam in all the gaps around the radiator that are there from the factory.
If a shield…or in my case a modified PFS box with a big K&N is used, it’s a CAI.