Intake Mod

[Pete Shawn]

wondering what this will do to the intake?

has anyone done this before? saw this on the image search ...

.http://<a href="http://s1055.photobu...t=94bb93eb.jpg" target="_blank"><img src="http://i1055.photobu...i/94bb93eb.jpg" border="0" alt="Photobucket"></a>

[matt-c]

More or less nothing, except possibly change the sound. Used to do this all the time back in the day on XR3i's and RS Turbo's - even go so far as to cut half the airbox section way on the "cold side" to aid airflow. But you're talking about a mechanical fuel injection car there, as opposed to an EFI. And even so, it did pretty much bugger all back then except change the rasp of the intake.

The only real ways of benefitting the intake are a good quality air filter, such as a cone filter or the like (more surface area and 360º air flow), on the end of a cold air intake tube (ie, a longer tube designed to allow the air filter to sit in a cooler part of the engine bay, away form the hot air that accumulates in an engine bay), or a ram air design - typically a scoop or letter box port at the front of a car (grille or bumper) that catches the air directly - the idea being that the air is forced in, rather than the filter sucking it in (the faster you travel, the faster the airflow is onto the front of a vehicle).

Back in the ay, I built my own for an XR3i I had, which had the regular MFi airbox and metering unit. I used a letterbox shape funnel, mounted in the gap in the bumper (where a grille would be) in front of the rad, which funnelled down to a 3" port, and ran a ducting hose directly from it to the entrance of the airbox lid. Because air was being forced in, flowing faster than it normally would with the airbox simply sucking from atmosphere, which meant more air was getting into the airbox, it was getting in faster, and that put more pressure on the metering unit flap - which meant more air + more fuel = goes faster.

However, it didn't make a whole lot of difference! Ran a little smoother at higher speed maybe, but power and acceleration wasn't noticeable affected.

Looked pretty cool though...

[north]

changes are even power loss as the holes are made in the bottom sucking in hot air away from the engine.... you are better of creating an induction kit (as you can find on this site in the downloads) or adding an extra cold air intake on the standard intake duct (has to suck the air in right behind the bumper and you'll have to drill a hole in the original air duct)