tpn

UL

I can agree with the low amount of head pressure at the airbox is all that is needed to compensate for the vacume and filter constrants. I set my gauge (simple presure switch) to it's most sensitive position and installed it at the stock airbox opening to test the pressure differances between the elbow joint and a 45 degree angled box design for the CAI.

I had to hit ~60 mph to set off the switch on the 45 degree angle and ~70 mph to set it off with the elbow joint. Yet the butt-o-meter said that there was a noticable responsivness felt much sooner than the 60 mph sensor signal. These tests were at mild constant acceleration with shift at 6000 to 6500.

Luis

[QUOTE]Originally posted by cdelena
[B]

I

Pinky

Question to the very experienced. In the next week I will be receiving a Mingster special CAI. I am about to design a test for seeing if it will show gains.(or losses most likely not)

Her is what I plan.
4 runs each:
A base line run as its been for months!(#1)
1. No air dam
2. Air dam only (hole cut in it)
3. CAI and Air Dam installed.

Runs will be done from:
2.5K-8.5K in 2nd.
2.5K-8.5K in 3rd.
2.5K-8.5K in 4th.(possibly will be left out very risky per BOB might be around)
2.5K-6K in 3rd.
2.5K-6K in 4th.

I will be doing these via stop watch unless somebody can help out in getting something to track those times in a digital format making it 100% accurate!(looking for help here!) These will be done all in an afternoon. I will record ambient temps. Inside airbox temps will not be recorded.(sorry) Unless somebody sends me the equipment!

Luis

I think you've got the general idea. I have used this method with success, basically meaning that I got fairly repeatable results.

A few things are critical:

0) You cannot shift.
1) You have to always run the same stretch of road.
2) You have to use the rev counter on krpm multiples to time the stopwatch. The reason for this is simple, every 1krpm you get a thicker stroke on the counter dash that it is easy to spot visually.
3) It's easier if you find a passenger to do it.

To make sure you always run the same stretch of road, get your car to a constant speed below the rpm range and gear you want to measure and at a given land mark floor the throttle. Start measuring when the appropriate rev counter stroke lights up and stop accordingly. Repeat a few times to make sure you get repeatable results.


I would recommend different rpm ranges for you to measure.

I would test 3 ranges:

Low rpm (2-5krpm)
med rpm (4-7krpm)
high rpm (6-9krpm).

Do it in 3rd and in 4th.

Done properly this will be quite revealing.

xviper

An update on my "snorkel" (see my earlier post in this thread). I've just come back from a 2500 km trip to the west coast, driving for many, many hours of constant heavy rain, following traffic that was throwing up clouds of water. Some people have shown some concern about sucking up water into the intake and possible damage to the engine. I can assure you that my snorkel sucked up a lot of water during this drive. When I inspect the underside of the hood in the area that leads to the airbox intake, I can see the water "tracks" that led straight into the airbox. A telltale sign of where the water went are bits of sand that came in with the water. The bulk of the sand ended up in the first chamber with a smaller amount in the actual filter chamber. There was sand in the pleats of the filter. The car ran beautifully with tremendous roll-on in every gear (sometime to redline). From the pattern on the underside of the hood, I conclude that the air ducted in by my snorkel went directly into the air intake horn at a good velocity even though the snorkel was not actually connected to the horn. There was no other such pattern anywhere else under the hood. My snorkel, however, was directly in front of the intake horn. I can only imagine how well it would have worked if it was connected (like in the snorkel-type CAI's being sold out there). Unless you drive through standing water, this is NOT a problem. Even big splashes of water was not a problem since I think that it is too heavy to actually go up the pipe and just dribbles back down and out.

donnys2k

xviper any pictures of this mod?

RACER

RACER

x2