Firstfives.org

It will help by both reducing the engine bay ambient temperature and by increasing exhaust flow by retaining heat inside the header. This raises exhaust temperature thus lowering its density, and as a result it flows more easily. Same overall mass flow rate, but with less resistance.

What about the improved airflow through a nonstock filter? Is it possible to buy a box filter that is equivalent? Or is the advantage negated by the intake of warmer air (assuming the cone filter is not extended)?

Would like to know this myself!

Need to give a shout out to Peter Florance for writing that throttle body FAQ!!!

Thanks to that, and a bit of my own tweaking, I have already got this thing to go from not idling at all to idling rock solid and no longer dieing upon throttle release!

Now to get the timing..

Ok, I just went out and had another go at it and by some magic I was able to squeeze it out. Putting it back in might be another story, but if it came out then it'll go back.

Time for some adjustments/cleaning!

Hey guys

New to the forum, I am in the process of trying to revive my old 530i (drove it a few years back in high school). Back up in my home town for a week right now and my goal is to get this thing running smoothly by the week's end.

Anyways, I've been searching around here for about an hour ...