Mike355F1 said:
I am getting my first NSX tomorrow and the first mod I would like to do is to the intake. The only problem is I can't find the thread where I read about this. It involved removing something and adding a PAM cap somewhere. I know there are no performance advantages but from what I read it improves intake sound. Can someone give me instructions on how to do this or refer me to a thread on it.
Thanks
Mike
Holly cow that was an old post / you have a good memory. I was the one that posted that solution many years ago on the NSX Listserver.
Cheap Airbox Solution
Date: 10/25/1998
As some of you may know - I have been very interested in modifying my airbox
to increase the airflow into the engine. The stock design is a good one -
cold "ram" air into the engine. For some mysterious reason though (sound?)
they made the tubing restrictive, the path somewhat torturous, and built a
huge baffle on the other end of the airbox. Thus, the air flows into the
intake and straight back to the back of the baffle - and then it moves up
into the airbox - through the filter and finally into the car.
As some of you may also know, Comptech sells a wildly expensive carbon fiber
replacement box for about $550. I have been hearing that Acura of
Brookfield modifies the stock box by cutting the intake and cutting and
capping the baffle to mimic the CompTech design for about $70 in labor.
I have already replaced the stock air filter for a K&N one and noticed
better sound and a little better response - but this was not enough. As a
"ramblin wreck from Georgia Tech" I set out to find my own solution. I am
not condoning or recommending others try this (my lawyer wrote that) but
believe I have solved some of the problem and received most of the benefit
for free and under 5 minutes.
Here is what I did. First, I removed the airbox cover (6 screws), removed
the hose clamp and baffled rubber tube to the engine, and removed the air
filter. If you reach way down into the air box now you will feel that to
the front of the car is the intake opening and to the back is the resonance
tube. You could remove the tube and try to cap it - but I sought an easier
solution. I searched for something that would fill and block this hole and
make it flush so the air would rush into the engine and not down the
resonance tube - and I found it!
If you have a large spray can of Pam vegetable spray (yes you read that
right and no this is not another glitch in the listserver) - it will fit
incredibly tightly and almost flush with the resonance tube. Basically I
pushed like hell until it fit and slid in (and it is never coming out!).
Just make sure the top of the Pam lid faces towards the front of the car.
The cap is a perfect design as it is very flexible at the bottom and very
rigid / reinforced at the top. The sound is now very cool and there is now
a true ram air effect into the engine. I have looked at the air intake
opening and do not want to butcher this with a knife as I feel it will give
me little additional improvement.
Anyway - if you are cheap and interested in a mod you can do yourself for
"free" - here you go. Maybe I should have sold the caps for $50 each and
printed Racer NSX logos for them? Oh well, Dali, RM, and CompTech are safe
for now! ;-)
__________________________________
Update - it didn't last. The Pam cap eventually cracked all over the place as it was stressed. No engine damage - but can't recommend it unless you change it with every oil change. BTW - it did sound cool but even the butt dyno showed no measurable improvements!
.
