Denzil,
If you want to have a quiet system with "tube headers" you can. Lengthen the
secondary pipes 10" - 12" (254mm - 300mm for the imperially challenged) to
lower the resonant frequency of the system. Fit a good resonator just after
the 2 into 1 section joins. Add a good quality muffler after the rear
suspension arch and it should be reasonable. Not as quiet as stock but you
will have better performance that a stock system and have better fuel
economy as well.
I think the "tube headers" are worth the expense as the best bang for buck
improvement you can do and will pay for the cost quickly in improved fuel
economy.
My tuppence worth anyway.
Cheers
Feral Errol
mailto:[EMAIL PROTECTED]
http://www.datrats.com.au/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Denzil Palmer
Sent: Friday, March 23, 2001 8:13 PM
To: [EMAIL PROTECTED]
Subject: Re: Newbie
Brian,
I beg to differ on the issue of headers they are very noisy from inside an
un-insulated Datsun, best to use a stock 4/2/1 cast manifold which flow
pretty well and quietly, going back to a 2" pipe and free-flow muffler.
The tube headers I had on my L20B drove me mad on long trips, and also gave
a lot of trouble with exhaust system resonances and vibration which the
heavier cast-iron manifold managed to damp out.
Especially since you say you aren't one-eyed about performance.
Denzil Palmer
----------
>From: "Errol Smith" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: RE: Newbie
>Date: Fri, 23 Mar 2001 9:02 PM
>
> Brian.
> I would fit a good L20B black rocker cover high energy engine from a S2
> Bluebird, bolt on some extractors and put it on LP gas
> That way you will have some grunt and be economical.
> Just my tuppence worth
> Cheers
> Feral Errol
> mailto:[EMAIL PROTECTED]
> http://www.datrats.com.au/
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Brian K.
> Sent: Friday, March 23, 2001 2:07 PM
> To: Thudd
> Subject: Newbie
>
>
> Hello all on the list!
>
> I have an old faithful 180B which has served me well for many years,
> however the engine is now approaching the end of its life. I could get it
> rebuilt, but for not much more I can get a new engine and have that
> done. I asked one workshop on the recommended option, and he suggested an
> L20B motor. This seems like a good option to me; it's an easy swap and
I'm
> not trying to make a performance car out of it, just something with a
> little more urge than normal. However, anything that I *can* get out of
> it, I *will* (within a fairly tight budget; I don't want to spend heaps
and
> gain little).
>
> So what advice can anyone give on an L20B swap into an 180B? What can be
> done to the engine during a rebuild that would extract a little more
power,
> without going overboard? By 'overboard', I mean I'm not interested in
> building some 200HP race-ready monster. This is my daily driver, and
> spends most of its time doing a highway commute.
>
> The workshop suggested putting a different head on the motor; I can't
> remember which one but he said it'd be about $400 extra (including
> polishing etc). A new exhaust system will definitely go on, I just don't
> know what yet.
>
> Thanks in advance,
>
> Brian K.
>
>
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