They're made from pressed steel sheet - kinda like a muffler :)
Most cars have cast iron manifolds but I guess Datsun wanted to save some
weight and design a better manifold, more like a header, so they used
pressed steel except for the collectors and flange.
Mike
----- Original Message -----
From: "Stephen McCartney" <sgam@hotmail.com>
To: <rickultracolor@iprimus.com.au>; <datsun-roadsters@autox.team.net>
Sent: Tuesday, December 04, 2001 1:13 AM
Subject: Re: 2000 exhaust header pipe
> Rick, the original headers are readily identifiable. If you can imagine
> that someone took two halves of a header (literally split down the middle
of
> the tubing) and welded them together, that's how they're built. I've
never
> seen such a weird exhaust manifold in my life! Also, whilst they're
better
> flowing than my brother's EK Holden manifold (all 90 degree bends!) it
> certainly isn't what you'd refer to as "extractors". !
>
> Cheers,
> Steve
>
>
>
> >OR MAYBE the set of headers I thought were original were actually better
> >quality after market ones !!!!
> >
> >Regards,
> >Rick
> >
> >
> >----- Original Message -----
> >From: "Stephen McCartney" <sgam@hotmail.com>
> >To: <datsun-roadsters@autox.team.net>
> >Sent: Monday, December 03, 2001 1:56 PM
> >Subject: Re: 2000 exhaust header pipe
> >
> >
> > > Sounds like a good excuse to get some more horses out of your car. A
> >decent
> > > set of headers will make a huge difference compared to the factory set
> >up.
> > > We've had cars in Melbourne dyno'd with 15-20 more horsepower *at the
> > > wheels* simply by fitting a custom header & 2 inch exhaust. I haven't
> > > measured my car's HP, but it certainly made a difference. It makes a
> > > standard 2000 Solex look wheezy! And the good thing is, it gives you
> >more
> > > tractable power, right across the rev range. We've got great intakes
on
> > > these cars, it's the exhaust that lets them down.
> > >
> > > Cheers,
> > > Steve
> > > ('68 2000 Solex)
> > > Actually, with the way our dollar is, it might even be cost effective
to
> > > order a set from Lou Mondello here in Australia...
> > >
> > >
> > >
> > > >From: Marshall Colley <mcolley@earthlink.net>
> > > >Reply-To: Marshall Colley <mcolley@earthlink.net>
> > > >To: <datsun-roadsters@autox.team.net>
> > > >Subject: 2000 exhaust header pipe
> > > >Date: Mon, 03 Dec 2001 10:09:58 -0700
> > > >
> > > >I recently hit a rock on my dirt road that broke one of the four
> >exhaust
> > > >pipes off at the point where they are collected (at the flat plate)
and
> >was
> > > >wondering if it's possible to weld it back on. I have a Mig welder
but
> >the
> > > >area looks real tight and I'm not certain I can get the Mig into the
> >center
> > > >of the collector area to do the weld. It appears certain that I will
> >have
> > > >to take it off the car.
> > > >
> > > >Does anyone have experience in this area as to the feasibility of a
> >weld
> >or
> > > >am I better off replacing the header? If so, does anyone have a
spare
> > > >exhaust header for sale?
> > > >
> > > >I have a 68 2000.
> > > >
> > > >Thanks,
> > > >
> > > >Marshall
> > > >
> > > >/// datsun-roadsters@autox.team.net mailing list
> > > >/// Send admin requests to majordomo@autox.team.net or go to
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> > > >
> > >
> > >
> > > _________________________________________________________________
> > >
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>
>
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