Yes you WILL get 30+ mpg average with SU's and a torquer cam on an L20B.
On my car I averaged 31mpg over 30,000 miles driving in general like a
controlled maniac, if that makes sense. On a high 15 second car. And yes
that was adjusting periodically for odometer error(tyre wear is actually
quite noticeable in this respect!).
Denzil Palmer
----------
>From: "Tom Richardson" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Subject: RE: L20B mods. + mpg
>Date: Tue, 27 Mar 2001 1:52 AM
>
> Ryan,
>
> It's cause you cane the crap out of your car, that's why! (If that evening
> was anything to go by :)
> Also remember your stereo would weigh quite a lot, which wouldn't help at
> all
>
> - Tom
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of 1600 BoY
> Sent: Monday, 26 March 2001 10:46 PM
> To: [EMAIL PROTECTED]
> Subject: Re: L20B mods. + mpg
>
>
> u said u should get 30plus mpg with sus. i got a l20b, mild cam, and i dont
> know if its the way i drive it(hard) - or not but im getting about 20mpg...
> its got a 240k carby on it.
>
> any suggestions why it would be so low?
>
> thanks,
> ryan
>
>
>>From: "Richard Clough" <[EMAIL PROTECTED]>
>>Reply-To: [EMAIL PROTECTED]
>>To: <[EMAIL PROTECTED]>
>>Subject: Re: L20B mods.
>>Date: Mon, 26 Mar 2001 22:15:37 +1000
>>
>>I agree, SU's are the carbs for road performance and fuel economy, they
>>dont
>>have inbuilt power jets primed with an accelerator pump. They dont come on
>>really hard but they let an engine breathe a lot better than a stock carby
>>set up.
>>You should easily get 9 litres/100Kms or 30 plus MPG. with performance that
>>will surprise your V8 Commodore punters.
>>
>>----- Original Message -----
>>From: "Michael Cassidy" <[EMAIL PROTECTED]>
>>To: <[EMAIL PROTECTED]>
>>Sent: Saturday, 24 March 2001 23:58 PM
>>Subject: Re: L20B mods.
>>
>>
>> > I've used Su's before, good carbs, better performance, Great induction
>>noise and
>> > they DONT use alot of petrol, Actually i think the economy didn't change
>>much at
>> > all with the change to su's... Trust me give em a go.
>> >
>> > "Paul W. J. Stanley" wrote:
>> >
>> > > Thanks for the info Ken. I'm thinking of adding a few 'bits' to my
>>1981
>>200B
>> > > L20B. Does anyone know the difference between the L20Bs that came out
>>in
>> > > various Datsuns? I guess the 'desirable features' is all you need to
>>know.
>> > >
>> > > I can get some extractors and the electronic ignition. Is there a
>>different
>> > > water pump for the auto? My motor is from an automatic. I can also get
>>the
>> > > clutch and flywheel, and a 'big' cam. That's the only info my friend
>>has
>> > > about it...he says it's extreme.
>> > >
>> > > I wouldn't mind DIY port work too...might look into that. I've got a
>>ye
>>olde
>> > > carby...I dont think I'll get twin SUs because I'm a cheapskate on
>>fuel
>>(you
>> > > have to use PULP with 9.5:1 don't you?)
>> > >
>> > > Paul
>> > >
>> > > ----- Original Message -----
>> > > From: Ken Abraham <[EMAIL PROTECTED]>
>> > > To: <[EMAIL PROTECTED]>
>> > > Sent: Saturday, March 24, 2001 3:47 PM
>> > > Subject: Re: L20B mods.
>> > >
>> > > > G'day all,
>> > > >
>> > > > Some things to consider for a mild L20B
>> > > > I have done these things to my motor and am reasonably happy with
>>the
>> > > > results, there is a significant increase in performance and change
>>of
>> > > > 'character' compared to stock L20B.
>> > > > I have included approximate prices if you get parts from U-Pull and
>> > > Trading
>> > > > post.
>> > > >
>> > > > 1. Start with S2 Bluebird Motor (check for bore wear!). Desirable
>>features
>> > > > include, big valves, 264degree SSS camshaft, strong crank, lowish
>>mileage.
>> > > > cost 2nd hand $100
>> > > > 2. Electronic Ignition (From some Bluebirds) cost $50
>> > > > 3. Automatic transmission water pump and fan (i.e viscous clutch,
>>fan
>>does
>> > > > not spin faster than 2500 Rpm) cost $25
>> > > > 4. 6 cylinder flywheel and clutch (1 kilo lighter, bigger clutch,
>>very
>> > > > noticable performance boost in 1st gear) ;) cost $40
>> > > > 5. Extractors. cost $ 50 - $100
>> > > > 6. Twin SU (Genuine) carburettors on SSS manifold. cost ~$150
>> > > > 7. Port work. Open inlets to 1.5 inches for SSS manifold, modify
>>horrible
>> > > > factory exaust port. cost ~$10 for bits and pieces needed to DIY
>> > > > 8. Shave head ~1mm to increase compression to about 9.5:1 cost ~$30
>> > > > 9. Gasket kit and sundries cost ~$150
>> > > >
>> > > > All up about $600 - less if you shop around and buy wisely.
>> > > > Regards,
>> > > > Nick
>> > > > 1978 Datsun Stanza
>> > > >
>> > > >
>> > > > ----- Original Message -----
>> > > > From: Brian K. <[EMAIL PROTECTED]>
>> > > > To: Thudd <[EMAIL PROTECTED]>
>> > > > Sent: Friday, 23 March 2001 3:06 PM
>> > > > 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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