[Roadsters] wheels, exhaust

[Gary and Cindy Ault]

Larry,

John has it right.  The factory muffler is straight-through, with one, 
cone-shaped, perforated baffle which restricts the pipe diameter to about 
half.  If you have a factory late-model resonator, its pipe ID is slightly 
smaller than the inlet, and there is no baffle at all.  It's just a 
glass-pack.  The factory parts produce a pretty mellow sound, nastier with a 
header.

Gary

----- Original Message ----- 
From: "John F Sandhoff" <sandhoff at csus.edu>
To: "Larry Braddock" <larrybraddock at ca.rr.com>
Cc: <datsun-roadsters at autox.team.net>
Sent: Friday, November 05, 2010 1:20 PM
Subject: Re: [Roadsters] wheels, exhaust


>> Then I measure [my wheels] and they're 14" and the steel rims
>> on my 66 are 15".
>
> Stock is 13" on the early 310's with drum brakes, and
> 14" for the later ones. There's two widths of 14" as well, as
> I recall early was 4" and later was 4.5" but don't quote me.
> Your 15" wheels came from somewhere else...
>
>> My muffler is way too loud. I look underneath and see apparently
>> 1 muffler 1/2 way back, and another near the rear.
>
> The one in "the middle" is the muffler, and the canister near the
> end is a resonator, to smooth out the exhaust note.
>
> I suspect the innards have blown out of the muffler and maybe
> the resonator.
>
> -- John
>     John F Sandhoff   sandhoff at csus.edu   Sacramento, CA
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