AEM/Injen/Process West CAI
 

Hey guys,
Looking at getting a CAI for my MY11 STi and trying to figure out which one to go for. I know the Process west one uses a K&N filter and I have used them for years in Bikes and cars (Panel & Pod), but the Process West is another $100 more than the rest.

Was just wondering what people thought.

Drew

Bit of a boring thread! I bought the AEM. Had some nice reviews! Might chuck something in the MY11 owners thread when I get it.

Sorry I missed this one.

I run the AEM (mainly cos of the dry filter and similar pipe sizing) as well, nice induction sound and I didn't have any CEL or issues with mine fitted untuned.

The PW one I put on mine sounded great, but screwed up the power/torque/timing, so I took it off again until I can get it tuned to suit. Hopefully in the next few months :)

Interesting the PW one has issues but the AEM one is ok. I might chuck it on and see how it runs without tune. Be interesting!

Drew

Tried sticking a process west CAI on my 08 only to end up wasting a day fitting it then having it removed. The diameter is way too big and can confuse the maf compared to the stock box until and aftermarket ecu becomes available.. I believe AEM make a cai that has equal diameter to stock box and can be tuned. I learnt the hard way... Hope that helps

[QUOTE=Anth08;702216]...process west CAI on my 08...The diameter is way too big...[/QUOTE]
I measured the stock diameter on my MY11 and it was exactly the same, but yes, as I said a few posts above, it still screwed up the maf readings :( Going for a Verso at the end of the month, so it's going back on then :)

[QUOTE=JamieBlade;702235]I measured the stock diameter on my MY11 and it was exactly the same, but yes, as I said a few posts above, it still screwed up the maf readings :( Going for a Verso at the end of the month, so it's going back on then :)



Sent from my iPhone using Tapatalk[/QUOTE]

Yeah see how you go. Sean didnt feel it was safe enough so i swapped it back. Was spewn... It may work for you as he said it can sometimes be done.. Hope it works for you, should sound mint!

I run an injen system. Feels pretty smooth so have no complaints. Went on like a breeze too

[QUOTE=JamieBlade;702235]I measured the stock diameter on my MY11 and it was exactly the same, but yes, as I said a few posts above, it still screwed up the maf readings :( Going for a Verso at the end of the month, so it's going back on then :)



Sent from my iPhone using Tapatalk[/QUOTE]

Dont bother, they wont tune it with it on.

Was honestly thinking the same thing. I still have my Process West intake and i wouldn't try and sell it knowing yourself or someone else will have issues with the tune.

[QUOTE=huggy_b;702554]Dont bother, they wont tune it with it on.[/QUOTE]
Really? They said they would via email?

I'll be going there on Monday anyway as they want to check that they can communicate with my ECU (something about some late models needing some electrickerey before it'll talk), so I'll ask them then.

Told me straight out to take it off and put the original airbox on when I was enquiring about getting a tune - Trolley was the same.

CAI is not needed if you are running the stock snail, it will not net you any extra killawasps by itself either

I was hoping they'd be able to fix the surging/missing issues that the CAI caused? If the tune can't fix those, what will? Not bothered about extra wasps, I've got enough to keep me happy, just want noise.

If you want noise, buy a BOV.
CAI upsets the MAF scaling in the newer WRX's and ends up outside Sean's comfort factor as far as his tuning goes. If you really, really want it then maybe take it to an ECUTEK dealer and see if they'll do it. Expensive exercise though and not worth it unless you have other mods to add.

I find it odd that something with more surface area and less restriction if tuned right can't net better results? Doesn't make logical sense. There are multiple posts saying that the gains aren't massive, but none saying that it makes no difference! (None that I have seen anyway).

Drew

[QUOTE=TROLLEY;702639]If you want noise, buy a BOV...[/QUOTE]
But that just gives you the TSHHHHHH - I want the Wooooosshhhh-TSHHHHH :D
[QUOTE=Drewski;702643]...Doesn't make logical sense...[/QUOTE]Agreed Drewski, seems strange to me too.

I spoke with Sean this morning. He said he's got no issues tuning it with the PW CAI installed, but can't guarantee he'll be able to tune out the surging. He asked me to leave the stock intake in the trunk and said he'll swap it back if he can't fix the tune with the CAI. I'll know for sure in a fortnight...

Any updates on this mate ?

[QUOTE=JamieBlade;702899]But that just gives you the TSHHHHHH - I want the Wooooosshhhh-TSHHHHH :D
Agreed Drewski, seems strange to me too.

I spoke with Sean this morning. He said he's got no issues tuning it with the PW CAI installed, but can't guarantee he'll be able to tune out the surging. He asked me to leave the stock intake in the trunk and said he'll swap it back if he can't fix the tune with the CAI. I'll know for sure in a fortnight...[/QUOTE]

I have the Blitz CAI. [url=http://www.blitz-uk.co.uk/ProductItem-2518.aspx]Blitz UK: Products > Air Filters > Sonic Power[/url]

Seems to work pretty well in my 08Sti. No surging and plenty of noises. The stock bracket leaves a little to be desired though so will be putting in a second bracket to help support.

[QUOTE=Anth08;715004]Any updates on this mate ?[/QUOTE]
Sean couldn't get the PW CAI to work within his 'comfort zone', but offered to use my car as a test vehicle once he's had a play with the software. It's been a few weeks now, so I should give them a call and see how they're going.

I'm running the Cobb CAI on my my12 wrx untuned.I can't notice any power increase or decrease and car seems to be running as normal but it sounds awesome yeeoowwwww!