Rich,
Want loud??? Check out a rotary w/o mufflers. Yeeeoowww!!!!!!!
Mike
----- Original Message -----
From: "Ryan, Richard" <RRyan@frk.com>
To: "'Alex Avery'" <aavery@rica.net>; "Gary McCormick"
<svgkm@halley.ca.essd.northgrum.com>
Cc: <datsun-roadsters@autox.team.net>
Sent: Monday, January 08, 2001 7:08 PM
Subject: RE: Should I add a Header?
> I have never driven a roadster with a stock manifold. The race car has a
> header and open exhaust. Its so loud it hurts my ears when I am next to a
> wall on the outlet side.
>
> I have had experience with other 4 cylinder cars and for them there isn't
> any real difference in the noise level between headers and the stock
> manifolds.
>
> I stand corrected.
>
> Dick Ryan ex. 24022
> (650)312-4022
> Risk Management Dept.
> SM 2000/2
> FAX (650)312-5830
>
>
>
>
> Sorry, but headers are almost always significantly louder than cast
exhaust
> manifolds. The thinner wall of the header allows a lot more of the noise
> of exhaust blasts (at the head, where the forces are most pointed and
> loudest) to transmit--regardless of exhaust pipe, muffler, etc.
>
> Headers are louder than stock manifolds.
>
> >
> >"Ryan, Richard" wrote:
> >
> >> I don't think the sound level is determined by the header or stock
> exhaust
> >> manifold. The sound level is determined by the downstream things
> >> (resonator, muffler, glaspak, etc.).
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