Date: Sun, 19 Aug 2007 11:49:02 -0700
Reply-To: neil N <musomuso@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: neil N <musomuso@GMAIL.COM>
Subject: Re: '82 diesel 1.8 conversion
In-Reply-To: <792457.23916.qm@web33508.mail.mud.yahoo.com>
Content-Type: text/plain; charset=ISO-8859-1
Cool. Ok.
I generally understand what you are saying.
Any decrease in HP when 1.8 head put on 2.0 , is due to the 1.8 intake
manifold shorter runs and at exhaust. Especially if these are not
tuned to whatever cam is being used. Correct?
Neil.
On 8/19/07, Robert Keezer <warmerwagen@yahoo.com> wrote:
> Neil,
>
> The main reason for going with a 1.8 head and
> intake manifold when using the Diesel hardware is
> is to fit the engine under the engine lid.
>
> Using the 2.0 stock puts the crossflow intake
> manifold above the lid, meaning you have to cut a
> hole in the lid .
>
> The benefit of the longer intake runners on with
> the crossflow head is hp gain.
> Long runners equal hp gain.
>
>
> The benefit of the longer runners is in a narrow
> range of RPM, most likely over 5,000 rpm, where
> it is rare to go in a Vanagon.
>
> The compromise then is the Digifant intake
> manifold. This has longer runners than say a VW
> Fox or Rabbit.
>
> Long runners are tuned runners. They help
> increase air flow to the cylinders. The more air
> -fuel you can cram into the cylinders, the more
> power you can get. The exhaust downpipes also
> need to be a tuned length, such as individual
> headers on a performance race engine have a
> certain length before joining together.
>
> Length of intake and exhaust is designed by
> formula starting with the cam . The pressure wave
> is timed to return to the valve just as it opens
> or closes.
>
> Incorectly tuned exhaust will lower hp .
>
> The Tiico has a good example of a tuned exhaust.
> The manifold divides the exhaust in 2 and sendsit
> down two seperate pipes a certain length before
> joining.
>
> The intake ports and exhaust ports are the same
> size for 1.8 and 2 liter.
>
> The longer tuned length is useful for a lighter
> car that can spool up rpm rapidly.
>
> In the heavy Westfalia you need a bigger engine
> or performance mods to do this.
>
> Robert
>
>
>
> --- neil N <musomuso@gmail.com> wrote:
>
> > Hi Robert.
> >
> > Do you know if there's a HP loss (tiny loss
> > likely) when using the 1.8
> > head on the ABA 2.0?
> >
> > Thanks.
> >
> > Neil.
> >
> > --
> > Please send me your Vanagon/Westfalia links!
> > http://vanagonlinks.googlepages.com/home
> >
> > Neil Nicholson. 1981 Air Cooled Westfalia.
> > http://web.mac.com/tubaneil
> >
> >
> >
> > On 8/18/07, Robert Keezer
> > <warmerwagen@yahoo.com> wrote:
> > > Hi Byron,
> > >
> > > I have done the 1.8 conversion and my
> > > recommendation is to use a 2.0 liter( '93-'99
> > ABA
> > > block with the 1.8 head instead.
> > >
> > > I have gone thru two 1.8's and so has a
> > > friend's.In my experience they don't hold up
> > to
> > > the demand the Westfalia puts on them.
> > >
> > >
> > > The 1.8's are underpowered in a Westfalia and
> > the
> > > strian is too much for the rods . I have had
> > two
> > > engines burn out rod bearings and likewise my
> > > friends.
> > >
> > > The 2 liter has oil spray nozzles that spray
> > the
> > > bottom of the pistons, cooling them and thus
> > > keeping the rods cooler.
> > > It also has more HP and torque than the 1.8.
> > > 2.0 blocks around here go for 200.00-300.00.
> > >
> > > You use the 1.8 head and head gasket. You
> > need to
> > > clearance the left firewall to accomodate the
> > > intake manifold. For fuel injection system
> > you
> > > can use CIS, CIS-E, DIgifant 2, Motronic.
> > >
> > > I find Digifant 2 the esiest fuel injection.
> > > ('88-'92 Golf -Jetta)
> > >
> > > My 2 liter has gone over 215,000 miles since
> > I
> > > installed it in 1999. It's a strong engine,
> > and
> > > smoother, less vibration.
> > >
> > > I know the Diesel sounds good but I would'mnt
> > go
> > > with anything less that a TDI or 1.9 turbo.
> > >
> > > The other thing to consider is the
> > transmission.
> > > Your stock Diesel trans is low geared and
> > makes
> > > the engine run about 1,000 rpm's higher than
> > if
> > > you use a air-cooled trans with all the
> > Diesel
> > > trans stuff like bellhousing, brackets and
> > > mounts.
> > >
> > > GTI engine , 1.8 , about 105 hp and 109 ft
> > lbs
> > > torque.
> > > ABA engine 115 hp and 126 ft lbs of torque.
> > >
> > > Of course, how you fuel it or mods your
> > > make/don't make, can increase/decrease those
> > > numbers.
> > >
> > >
> > >
> > > Robert
> > >
> > > 1982 Westfalia
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > --- byron nemela <byronknemela@YAHOO.COM>
> > wrote:
> > >
> > > > I need some help from folks who've done the
> > 1.8
> > > > I4
> > > > switch. Even better, I could use a mechanic
> > > > who's done
> > > > conversions in the Detroit/Ann Arbor
> > area...
> > > >
> > > > OK, so I've got a lovely rust-free '82
> > Westy
> > > > with a
> > > > blown 1.6TD, and I'm about to buy a 1.8
> > engine
> > > > from a
> > > > GTI for $300. (I know, why gas? A used
> > 1.6TD
> > > > will cost
> > > > me $2000 shipped and still be 68HP vs
> > 107... If
> > > > anyone
> > > > can sway me to a 1.9TD switch, please let
> > me
> > > > know.)
> > > >
> > > > Thing is I'm a potter not a mechanic, but a
> > > > buddy can
> > > > drop the bad engine and mount the new one.
> > Then
> > > > 'Bill
> > > > Muncy's' in Ann Arbor says he'll do the
> > rest
> > > > (charging
> > > > me $74/hr 'including head scratching'). So
> > I'd
> > > > like a
> > > > general idea of how big a job it is, how
> > long
> > > > it
> > > > takes.
> > > >
> > > > 'Tom's VW pages' online, gives great info
> > on
> > > > diesel to
> > > > gas swap, but if anyone can point out the
> > best
> > > > 'step-by-step' resource - that would be
> > great!
> > > > I just
> > > > want to reduce our 'head scratching' here
> > (and
> > > > would
> > > > love to find a local shop who's done this
> > kind
> > > > of
> > > > switch).
> > > >
> > > > ...and (just so you know how the VW gods
> > are
> > > > having
> > > > fun here) I've got two months off starting
> > in
> > > > Sept and
> > > > had planned to tour the southwest in the
> > bus!!!
> > > > I
> > > > guess better the engine blew here than
> > there,
> > > > but I'd
> > > > still love to have it on the trip...
> > > >
> > > > So if you 1.8 Vanagon drivers could help me
> > > > through
> > > > this process, that would be terrific!
> > > >
> > > > Thanks,
> > > > Byron
> > > >
> > > > '82 Westy 1.6TD (rod through head...)
> > > > '93 Volvo 940T (old reliable)
> >
>
>
>
>
> ____________________________________________________________________________________
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>
--
Please send me your Vanagon/Westfalia links!
http://vanagonlinks.googlepages.com/home
Neil Nicholson. 1981 Air Cooled Westfalia.
http://web.mac.com/tubaneil
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