For autocross I cut the noise from my car by doing the following:
1. Wrap the pipe with header-wrap. It greatly reduces the pinging that
comes off the pipe. (Some folks who know about tuning use the wrap for
performance enhancement. I just wrapped the pipe to deaden the sound.
I've not noticed any performance change for autox)
2. Install a silencer (like John Whitling recommended). Aaen has a nice
assortment. Just keep the total exhaust length under 24", measured from
the centerline of the axle. :-(
Last year when I went to the Fort Myers Tour event, we were warned about
noise limits. Before making the trip, I had a muffler shop make up an
automotive muffler to attach to the Aaen pipe. It didn't look pretty and
weighed about 10lb. I wasn't all that concerned about performance...just
wanted to make it quiet. I was amazed to find that it was no more quiet
than the small Aaen silencer. It became very apparent that a LOT of the
noise comes from the INTAKE!
Many people have commented about how quiet my car sounds compared to
others who don't have the pipe wrapped.
-Jeff B.
Lee Tilton wrote:
The dirtiest looks we get at an autox event is when we sit in the
staging line for 5 minutes with the motor running at 3k rpm. The sound
even gets on my nerves. Is there any way to quiet the exhaust without
sacrificing performance?
Lee
________________________________
FormulaCar Magazine - A Proud Supporter of Formula 500
The Official Publication of Junior Formula Car Racing
Subscribe Today! www.formulacarmag.com or 519-624-2003
_________________________________
_______________________________________________
F500 mailing list - [email protected]
To unsubscribe or change options please visit:
http://f500.org/mailman/listinfo/f500
*** Please, DO NOT send unsubscribe requests to the mailing list! ***
