Making 75 db

Official Information about WHRRI racing, straight from the BOD and Chiefs of Specialties
Post Reply
User avatar
John McFarland
Posts: 48
Joined: Tue Oct 06, 2009 1:53 pm
Location: Mentor, Ohio

Making 75 db

Post by John McFarland »

Ok, so I'm coming up next weekend for race 4. I see sound is 75 db. How hard is that to make? I have no idea where my car reads. It has never been a problem at Mid Ohio or Pitt, but they have a higher allowance.

My current setup has a Magnaflow round muffler after the header and the exhaust runs out the back straight out. What are others out there doing on their setups that keeps the noise down to limits? I have this weekend to get all my final prep so if I need additional sound deadening I can get that done too.
John McFarland
ITA Nissan NX2000
User avatar
Brian
Posts: 881
Joined: Thu Jun 21, 2007 9:21 am
WHRRI Member Number: 1843

Re: Making 75 db

Post by Brian »

It seems like the generic solution for a car that is marginal on sound here is a 90 degree angled exhaust tip, pointed Down and Right (135* compass- as viewed from the rear).
"A nation which makes great distinction between its scholars and its warriors will have its thinking done by cowards and its fighting done by fools."

Thucydides, 460 B.C.
Post Reply