By David Vizard; if you don't know the name this would be a good time to find out about him!
In the May 2005 "Popular Hot Rodding"; grab it up and read it 3 times.
This is a very good article and will no doubt help EVERYone who reads it (or is at least going to do any exhaust work!)

well this is worth a self-bump; it is too good to pass up and I realize that nobody will bump it until they have had a chance to buy the mag and read the article. Plus the fact that the whole thing is the cost of buying a single 3" 90 bend at a local parts store.... and might help you pick the RIGHT size 2.5" bend instead LOL!!

It is about 10 pages with lots of technical and graphs and logic; great stuff; I hope someone else will have a look and chime in.
After reading LOADS of ...."individual theory"... here and elsewhere on 'Exhaust' it is nice to find someone who has tested scientifically and is publishing the info clearly. Like I said, just great stuff.
How to make horsepower and STILL not be obnoxiously loud........
testing specific mufflers and mentioning brand names.........
it is great.
ok....
someone else?

Any chance you could scan the pages and post them here or somewhere else?

Sounds like a good read!

Thanks\
Iwan

I use to have stacks of PHR
Lots of good information in those pages.
I will go buy one tonight, thanks for the heads up