http://home.vicnet.net.au/~ozhog/Technical.../ozhogtech1.pdf
this link might help to show how the test is to be done properly.....
Breakdown....
Test to be done in open area.....
Mic's to be placed on a 45 degree angle facing the exhaust....
RPM:
1-5 cyl 4,000
6 cyl 3,200
8 cyl 3,300
Rotary, 4,500
It should equate to approx 100-110 KPH (maximum speed of vehicle by LAW)
(on road of course... )
No one else to be in the location during the test.....
But have a read through it's very interesting....
oh and INASNT what sort of exhaust do you have....
Loz
:burnout: