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Old 09-27-2012, 04:50 PM   #1
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Cold air intake

Does a cold air intake do anything to mess up the ecu settings or has anyone had any issues throwing cels with one installed...becuase of the intake?

Just curious...
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Old 09-27-2012, 05:35 PM   #2
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Your stock is the best you can get or a 987 box. But to answer your question. It should be fine.
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Old 09-27-2012, 06:44 PM   #3
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This mod I've never understood in this particular application. It seems to me that the stock intake is a cold air intake.

The other thing that I've never really understood is the desnorkal...it seems that is a conversion to a hot air intake...
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Old 09-28-2012, 04:13 AM   #4
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Ive just heard a lot about them...so I was more curious. I can not imagine spending $600+ for a cold air intake for what they say is 3-4 more horsepwoer. Again - just more curious than anything...
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Old 09-28-2012, 04:29 AM   #5
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Especially in you climate stock is best. You can upgrade your intake piping but leave the stock box. Pedrosgarage.com has a good method to do this.
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Old 09-28-2012, 05:03 AM   #6
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Quote:
Originally Posted by trimer View Post
Ive just heard a lot about them...so I was more curious. I can not imagine spending $600+ for a cold air intake for what they say is 3-4 more horsepwoer. Again - just more curious than anything...
First off, the intakes range between $300-$400 not $600. They do seem to be less restrictive than the oem set-up, and the "bark" that they produce at various rpm's is nothing short of ripping ! By the time you're done creating some DIY "chicken scratch" intake, the amount of effort and aggravation involved will probably surpass the cost of the after market part.
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Old 09-28-2012, 05:43 AM   #7
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Funny, no one's really answered your questions. If you install an aftermarket intake and filter, it's most likely that the filter is oiled. It is a known fact that an over-oiled filter can foul the mass air flow sensor, and this will cause the CEL. The Porsche ECU has no problem adjusting for any greater airflow gained by adding an aftermarket intake/filter. Yes, there can be an HP gain with a higher flowing filter/intake, but there are certainly things to consider.
Generally, HP gains made by swapping stock parts for aftermarket parts will cost you in street drivability/legality
...which is why I'm starting to show for a trailer (and possibly add another Porsche to the stable!)
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Old 09-28-2012, 07:42 AM   #8
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Quote:
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First off, the intakes range between $300-$400 not $600. They do seem to be less restrictive than the oem set-up, and the "bark" that they produce at various rpm's is nothing short of ripping ! By the time you're done creating some DIY "chicken scratch" intake, the amount of effort and aggravation involved will probably surpass the cost of the after market part.
600 installed is what I am hearing...part plus install.
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Old 09-28-2012, 09:47 AM   #9
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the cai in the boxster is an oxymoron - the box already has a cold air intake (ps, even with snorkel removed, the intake remains sealed from hot engine air).

the aftermarket units don't seal and will draw hot engine air in, reducing performance as a result. further, a bit of research will show that vendors of cai's (evo, etc.) market the same unit for the 2.5, 2.7, 2.9 and 3.2 and use a common mass airflow sensor housing. strangely, the 2.5 and 3.2 have different maf housing diameters, so you start screwing with the ecu's ability to adapt at this point.

what you want to do is reduce restriction to air intake. cai's do this, but the cost and other side effects are not worth it. instead, remove your snorkle. change the pipe between your throttle body and air box. replace your airbox with a less restrictive airbox from a cayman/987. get a larger intake plenum and/or throttle body (997 unit, ipd, softronic). this will all reduce intake restrictions, keep the air cool, and not detrimentally affect intake tuning.
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Old 09-28-2012, 12:39 PM   #10
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My mistake, I looked up desnorkeling on the search. Doesn't really seem like it would add much to the overall performance. Not like it's a F1 machine!

Last edited by tanque55; 09-28-2012 at 12:48 PM.
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Old 09-28-2012, 01:02 PM   #11
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well, your engine moves what, 1.6 liters of air per rotation in a 3.2 l engine? at redline that = 11,500 liters of air per minute. sucking all that air in through a 3" pipe (reduced to 2.7" at the throttle body, and even less at the snorkel) takes work, and any work the engine does to suck that air in is power lost to the wheels. any inefficiencies in this airflow have a proportional effect on performance. something as seemingly minor as the snorkel, or the resonance chambers on an intake tube, will increase engine effort which will reduce horsepower. note, on a 250 hp engine, a 1% loss = 2.5 hp.
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Old 09-28-2012, 04:15 PM   #12
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I have a brand new EVO unit that I'll take 150.00 for just to get it out of the store room. We never use these things, its been here since 2008!
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Old 09-28-2012, 05:15 PM   #13
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Jake,
I will take it. I will call tomorrow, or feel free to call me. 256-874-1667
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Old 09-28-2012, 07:48 PM   #14
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Sold. Thanks for getting that thing out of my way!
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Old 10-01-2012, 03:52 AM   #15
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I bought and fitted one of these - EuroCupGT Highflow Induction Kit Boxster 986.

Porsche Boxster Performance 986 K&N Filter & Engine Induction | Air Ducts UK

They claim 10-20hp which I think is rubbish, does make a fab induction roar though. Got it off Ebay for £60.
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Old 10-01-2012, 05:13 AM   #16
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This always bugs me.

We have cold air induction on every Boxster from the factory. We take air into the engine from outside the hot engine compartment so the air is cooler/denser.

What you guys are talking about is a low-restriction air filter.

Of course with low restriction comes a downside, more and larger particles of dirt get into the engine. Seen two tests by independent test facilities.

Also I've had tuners with no axe to grind or $ to gain by selling me something tell me the stock air filter is just fine for about everything but a highly enlarged/modified/tracked motor.
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Old 10-01-2012, 08:45 AM   #17
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ok, just to let everyone know, i plan on messing with the evo to try and see if i can come up with something like the canister style that is in the other thread. i figured "what the heck" for 150.00. my take on the whole thing is that there are indeed restrictions introduced in the factory box and piping. some are there probably to mitigate the boxster's encroachment on the 911 and others are there for sound abatement. either way the airflow, while cold, is circuitous. from what i can gather, jake has indicated that the intake and exhaust are the significant restrictions. the heads flow huge numbers if what i read is correct. therefore relieving the intake exhaust restrictions should help. i will certainly let everyone know how it works out, but expect it to sit in my shed for a while before i get to this project.

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Old 10-04-2012, 01:20 AM   #18
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Quote:
Originally Posted by mikefocke View Post
This always bugs me.

We have cold air induction on every Boxster from the factory. We take air into the engine from outside the hot engine compartment so the air is cooler/denser.

What you guys are talking about is a low-restriction air filter.

Of course with low restriction comes a downside, more and larger particles of dirt get into the engine. Seen two tests by independent test facilities.

Also I've had tuners with no axe to grind or $ to gain by selling me something tell me the stock air filter is just fine for about everything but a highly enlarged/modified/tracked motor.

I still have the standard air filter in my system, only changed the intake pipe.

The Porsche offering has a muffler to cut down the induction roar, I replaced it with a straight through pipe as per my previous posting. It's a little larger diameter, aluminium instead of plastic and no restricting muffler arrangement.

Sounds good at full throttle.
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Old 10-13-2012, 03:12 PM   #19
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Can someone fill me in on what exactly comes with the evo cai kit. just trying too make sure that I got everything. Thanks.
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Old 10-13-2012, 03:57 PM   #20
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Can someone fill me in on what exactly comes with the evo cai kit. just trying too make sure that I got everything. Thanks.
Thats a full evo kit as they were provided in 2007 or so. Then the kit had an optional air filter, but now it comes with a K&N knock off. I'd use a real K&N cone filter and find the largest one that you can fit.
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