Cold Air Intake

myredmx5 · Postby **myredmx5** » Sat Mar 10, 2012 11:21 pm

Has anyone any knowledge about the AutoExe cold air intake availability in Oz and cost.
http://www.autoexe.co.jp/products/ramai ... su/na.html
I don't understand Japanese.
This may be a better way than putting a hole in the firewall?

Postby **NitroDann** » Sat Mar 10, 2012 11:34 pm

There are ways EQUALLY as good. but none better.

Dann

zephyrus17 · Postby **zephyrus17** » Sat Mar 10, 2012 11:58 pm

I've basically got a Simota Heat Shield filter and some tubing, but haven't got to the part where I drill through the firewall. Most probably because I've been delaying it and triple thinking the reprecusions of this - because this is a point of no return!

autospeed did a report on it, and there were some marginal gains. http://autospeed.com.au/cms/title_FreeFlowing-a-Miata-MX5/A_110680/article.html Not as much as FI, of course.

Lokiel · Postby **Lokiel** » Sun Mar 11, 2012 12:00 am

LOL - This is how the Chrome browser translates it into English (or should that be "Ingrish"):

Request from the fiery owner NA had also arrived to us. But, in fact, there was a fundamental problem. Layout of the normal intake, it was constrained by a fatal formula by the retractable headlights. Air cleaner box is pushed into the side of the exhaust manifold, due to the double whammy that farthest away from the throttle body, intake resistance has become a significant intake pipe due to the shape and complex, susceptible to heat.
Well as to develop a ram air intake system, such as a conventional front air intake layout was impossible. Engine room in the limited space of NA unique roadster, or create ... what the optimal layout.
At the end of trial and error, we are very boldly, as a concept is faithful, but concluded to very basic. "If you do not fit in, get out" is. Pot intake, if the racing world, of course, he that protrude outside. Is, you place a dedicated air intake duct on the bonnet on the passenger side.
As a result, captured by the air intake duct directly to the running wind, leads to cleaner box under pressure, was able to achieve significant efficiency gains by inhalation ram effect.
In addition, the effect was achieved by providing a complete thermal barrier heat shield plate and a dedicated cleaner box, completely cut off from the engine room air inlet passage portion.

- That should clear it up for you

You too could be "he that protrude outside."

zephyrus17 · Postby **zephyrus17** » Sun Mar 11, 2012 12:12 am

I don't like the look of it that protudes out of the bonnet, though. The LS ones takes in air from the front.

I thought I could re-route the tubing the the front, ahead of the radiator, but there wasn't enough space for that.

Postby **NitroDann** » Sun Mar 11, 2012 12:23 am

The LS ones dont work at speed.

They are designed for people who dont think hard enough about airflow.

Dann

zephyrus17 · Postby **zephyrus17** » Sun Mar 11, 2012 12:34 am

So, Dann, if not FI, what's the best intake alternatives other than the AutoExe and method shown on autospeed, any other way?

slimx · Postby **slimx** » Sun Mar 11, 2012 12:38 am

SKREEM PERFORMANCE MX5 INTAKE

Google it if u like

Fits NA too with very minor modification.

not road tested on NA though just NB for now.

Sent from my GT-I9100T using Tapatalk

Jeo · Postby **Jeo** » Sun Mar 11, 2012 12:46 am

TSI's/headlight lid intake/removing an indicator are all reasonable options; albeit a little more obvious. They all require some kind of fabricated airbox too.

Like Dann said, just think about where the air flows from and you should be most of the way there.

Postby **NitroDann** » Sun Mar 11, 2012 1:10 am

What Jeo said, especially about the part about what I said. :mrgreen:

Dann

deviant · Postby **deviant** » Sun Mar 11, 2012 2:11 am

As far as I could find before buying the a K&N typhoon this is about the best on the market: http://www.performance5.com/na_airintake.asp

Reading around it looks like most people see little or no gains with an intake kit but they do make a great noise.

Postby **NitroDann** » Sun Mar 11, 2012 3:30 am

Little or no gains based on what?

Dann

deviant · Postby **deviant** » Sun Mar 11, 2012 3:50 am

Based on manufacturers claims.

Based on half an hour with google reading other peoples experiences.

Lokiel · Postby **Lokiel** » Sun Mar 11, 2012 8:22 am

deviant, how can there be "little or no gain" using a CAI vs OEM, especially once the engine is hot and the car moving?

"Fresh cool air" > "hot engine air" since it's denser.

In a N/A car, the gains are smaller than simply adding F/I, but they ARE there and every "killer-wasp" is valuable.

I suspect that many CAI kits aren't effective because they're not getting enough cool air. The AutoExe kit shown here doesn't have that problem.

- "school me" if I'm wrong in any of this, I'm no expert and consider myself a perpetual student of everything.

Postby **NitroDann** » Sun Mar 11, 2012 10:20 am

Cold air intakes, specifically ram air type ones, generally dont show a great deal of improvement on a dyno, because they need an 80km/h+ wind hitting the front of them before they really shine. Also they dont make a big ifference to 0-100 times, because for 3/4 of the 0-100 run you are doing under 80kph. But testing 80-120 (rolling start) you will see a good improvement. That is, full throttle at 70kph, start timer at 80, stop at 120.

Dann