Nick,
It depends if your head has brass or steel valve seats. With brass seats the
added Sulphur in unleaded combined with the lack of lubrication causes valve
head recession into the seat. If the head has steel seats it is not a
problem. This means tappets need adjusting frequently and eventually the
valves pull right into the seats with performance drop off.
Cheers
Feral Errol
mailto:[EMAIL PROTECTED]
http://www.datrats.com.au/
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Ken Abraham
Sent: Wednesday, May 30, 2001 6:23 PM
To: [EMAIL PROTECTED]
Subject: Re: A STUPID QUESTION ABOUT ENGINE SWAP
Umm,
I am running a (modified) S2 B/Bird engine on unleaded, occasionally with
PULP, but NEVER with LRP.
What should I expect, and what causes the problem.
Regards,
Nick
1978 Datsun Stanza
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, 30 May 2001 4:29 PM
Subject: Re: A STUPID QUESTION ABOUT ENGINE SWAP
> Zac,
> Popular theory is that the black top L20B from S2 Bluey isn't. It's the
made in
> Aus engine. I seem to recall a letter from Nissan about this. It's LRP for
> these engines.
>
> Tom,
>
> The HE L20B did have a higher CR ~8.8 compared to ~8.4 but i'm not sure
how it
> was done - like smaller chamber or less piston dish. There is another
number
> stamped on some L20B's but i can't recall what it is - A W?? rings a bell,
> could be wrong - Errol may know.
>
>
> regards
> Terry
>
> > I thought all L-series were fine with Unleaded?
> >
> >
> > > Terry,
> > >
> > > Thanks for that list, sorry I got confused about your first statement.
One
> > > other question, what head was on the 'high energy' Bluebird L20b (the
one
> > > with the black rocker cover?) and was this the reason it was called a
'high
> > > energy' motor? Increased compression? I understand that they're crap
> > > anyway because you can't use unleaded fuel with them but I'm curious
anyway
> > >
> > > Cheers
> > >
> > > - Tom
> > >
> > > ----- Original Message -----
> > > From: <[EMAIL PROTECTED]>
> > > To: <[EMAIL PROTECTED]>
> > > Sent: Wednesday, May 30, 2001 12:29 PM
> > > Subject: Re: A STUPID QUESTION ABOUT ENGINE SWAP
> > >
> > >
>
>
> ----------------------------------------------------------------
> This message was sent using the AustarMetro Internet Web Mail System.
> http://www.austarmetro.com.au/
>
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