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Thread: CAI vs WAI: Myth?

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Posts: 141-150 of 152
2010-05-14 00:17:11
#141
Originally Posted by Vadim
The problem with WAI is, warm air. The problem with CAI is long pipes and bends that cause turbulence in the flow.

Side by side CAI will still win because it is able to deliver colder denser air. That means more air molecules to burn with the fuel.

The best setup, besides ram air (not practical), will be a WAI sectioned off and with a cold air source to it. You will have your mid range power and top end of a CAI.


I tend to fall in your camp Vadim. WAI with a shield and a duct to feed it cold air. Otherwise you can run the pipe under the battery tray and have the filter there so the pipe length is in between a short WAI and a full length CAI and that's perfect imo. I've seen a number of nice VEs set up like that.

I do think that a WAI just run straight up with a velocity stack is the best cheapo way to go. Once you get into second gear the engine bay is getting much cooler air.
2010-05-14 00:22:31
#142
Has anyone tried the ARC super induction box? I've heard people modding the s14/s15 to fit.
2010-05-14 01:17:14
#143
Originally Posted by Benito
....
I do think that a WAI just run straight up with a velocity stack is the best cheapo way to go. Once you get into second gear the engine bay is getting much cooler air.


I agree, cheap and very effective, reliable and safe for daily rain or shine.

The setup below lived up the Auto P11 and gave it some MPG .
2010-05-14 17:06:59
#144
I actually took off the CAI from my VVL like a month ago(due to rainy season and our beautiful streets downhere in CR) what I did was left the filter almost to the cornerlight and put a tube from the bumper all the way up to the filter itself..........so my filter its clean and away from water but its always receiving a good amount of cold air.............Only thing I notice throttle response is faster and I gained some low-middle range torq
2010-06-16 02:30:26
#145
hey guys, i'm probably jumping into this little discussion here a little too late, but i recently come across an interesting little tech article in last month's Import Tuner while I was getting my rice on in the magazine section of the local exchange during lunch. I thought some of the tech discussed in the article may interest or enlighten some of you a bit. The same article is located online here:

Performance Air Intake Systems - Fact of Fiction - Import Tuner Magazine

I like how they hypothesized power loss depending on the filter used, and pipe lengths, and air separation, which may end up fooling the MAF into overestimating airflow, thereby richening up the AF ratio, resulting in lost power.

Anyway I have an OEM CAI ordered, I will probably have a back to back dyno with the CAI/velocity stack'd filter vs the same CAI with the cold air extension taken off/velocity stack'd filter. This will be after I get cams installed, of course
2010-06-16 03:21:00
#146
Originally Posted by worldcrafter
hey guys, i'm probably jumping into this little discussion here a little too late, but i recently come across an interesting little tech article in last month's Import Tuner while I was getting my rice on in the magazine section of the local exchange during lunch. I thought some of the tech discussed in the article may interest or enlighten some of you a bit. The same article is located online here:

Performance Air Intake Systems - Fact of Fiction - Import Tuner Magazine

I like how they hypothesized power loss depending on the filter used, and pipe lengths, and air separation, which may end up fooling the MAF into overestimating airflow, thereby richening up the AF ratio, resulting in lost power.

Anyway I have an OEM CAI ordered, I will probably have a back to back dyno with the CAI/velocity stack'd filter vs the same CAI with the cold air extension taken off/velocity stack'd filter. This will be after I get cams installed, of course


That article essentially says, without a velocity stack, a short air intake (that a TON of people run without a velocity stack) is crappier compared to a normal cold air intake. Yep, known.

Makes sense to me, my butt, my previous dyno tests in 2005. I have no velocity stack and run a 3" Place Racing CAI with a K&N air filter.

If you can, worldcrafter, please try running cold and short without the velocity stack. Get all four of those puppies so we can crunch those numbers.
2010-06-16 03:41:42
#147
Screw it. I'll do a video test. 10mph 1st gear roll to rev limiter, 2nd gear roll from 30 mph to rev limiter, CAI, WAI. I'm too curious and want to try out my new tires =) BRB WITH RESULTS!
2010-06-16 04:35:25
#148
Lol testing was a failure? Hah Don't even want to really upload the videos because I got the same times.... In 2nd gear 30- rev limiter, 5.9 with CAI and WAI
2010-06-16 04:42:53
#149
Originally Posted by 92SentraSE-R
Lol testing was a failure? Hah Don't even want to really upload the videos because I got the same times.... In 2nd gear 30- rev limiter, 5.9 with CAI and WAI


So only topping out in 2nd gear was the test? Try really getting some speed and the difference will be more noticeable. Or better yet, dyno it.
2010-06-16 04:54:05
#150
Originally Posted by Viprdude
So only topping out in 2nd gear was the test? Try really getting some speed and the difference will be more noticeable. Or better yet, dyno it.


what do you mean by "really" getting some speed? Want me to do a 3rd gear pull? 60-rev limiter? I can do a easy freeway pull of that one but I'm not going any higher than 3rd gear to rev limiter! Ha..

Oh and I'm just down with this free testing stuff haha I don't want to spend on a dyno =)
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