I'm not using an AFM, so mine doesn't exactly apply..




I'd like to suggest that there *might* be more improvement in a cold air intake design over replacing the tubes on the intake.

There 3 main places where you could have flow issues:
1) Hole to the airbox.
2) AFM size itself
3) TB

The stock TB is 55mm, just a bit over 2". Opening it up in front of that is going to be of limited benefit unless you're running a larger TB (and porting your upper plenum in association with that mod). You can use a 5m or 7m TB with a bit of creativity to get to a 60mm TB.. If you choose to do that, use a late model (1988.5+) plenum, it's less restricted.

I mention cold air intake because monitoring intake air temperatures on an OEM 22RE indicate temps of over 100 degress, ~115 when at operating temperature when the outside air is around 70-75. Basically, that means that cool fresh air isn't making it into the air box, it's being preheated by the engine...

I like rodger's snorkle.. That might be an excellent way to get cooler denser air.