PF vs. RD (heads only) Now with content!

[sad_rocc at yahoo.com (Dan Smith)]

Well, the thing is, I was told by 3 different seemingly knowledgable people (on the 'tex though, so you never can be certain...) that the knock sensor stuff required for the RD head HAS to be CIS-E. Besides that, I have CIS in my mk1 now to begin with, so one way or another I'll have to convert wiring. I would prefer to only rewire the car once, so it'll be either CIS-E or digi, not CIS-E now and digi later. So, is it true the knock sensor stuff has to be from a CIS-E car? Otherwise, an RD head with digi stuff seems like the best of both worlds to me.
 
Dan

Dan Bubb <jdbubb@ix.netcom.com> wrote:
If you want to convert a CIS head to digi the inserts are $2.42 at
http://www.vwparts.com
So, no reason to scrounge them from a digi head.
NOTE: early CIS non-air shroud heads cannot use this insert, so always check
before making big plans.
Dan

----- Original Message -----
From: Dave Ewing 
To: 
Sent: Saturday, September 06, 2003 8:33 PM
Subject: Re: PF vs. RD (heads only) Now with content!


> I've never tried to put the Digi inserts into the CIS heads but I know
> getting the Digi inserts out of a Digi head is practically impossible
unless
> someone has some input on this. That would be the difference between the
> two heads and probably the only difference (as far as I can tell). HTH!
>
> Dave
> ----- Original Message -----
> From: "Dan Bubb" 
> To: "Dan Smith" ; 
> Sent: Saturday, September 06, 2003 2:39 PM
> Subject: Re: PF vs. RD (heads only) Now with content!
>
>
> > As far as the heads are concerned I don't believe it makes any
difference.
> > I believe the injector inserts from the PF head will fit in the RD head
> and
> > that the RD head has the threaded holes for bolting down the fuel rail.
so
> > you could run digi with the RD head if that was the deciding issue.
> > Both heads have the same valve sizes so there isn't much to choose there
> > power wise.
> > OTOH there is no reason the RD head and engine wouldn't run just fine
> using
> > whatever CIS you now have if that made it cheaper and easier.
> > So, choose whatever head is easiest now. You can go to digi anytime in
the
> > future with either head.
> > Note: as a positive check buy an 037 133 555A injector insert and make
> sure
> > it will screw into the RD head if you buy the RD head and think you
might
> go
> > to digi in the future.
> > Dan
> >
> > ----- Original Message -----
> > From: Dan Smith 
> > To: 
> > Sent: Saturday, September 06, 2003 4:39 PM
> > Subject: PF vs. RD (heads only) Now with content!
> >
> >
> > > Accidently hit enter on the last email which sent it off. Anyways, I
> > change my mind all the time and so now, after this whole thread on the
RD
> > digi/not digi thing I may change my mind again. I'm trying to decide
> > wheither I want the PF or the RD head for my swap. It will most likely
> being
> > going on a 1.8L bored to a 2L. Originally was an RD block, but has
custom
> > pistons and stuff so I don't think it matters.
> > >
> > > The PF is digi, which is cool because then I can chip it and it's kind
> of
> > unique. Plus it opens up the possibilities of boost later on. Also, the
PF
> > motor puts out slightly more HP than the RD but I don't know if this is
> due
> > to the head or bottom end. The RD is CIS-E, which would still require
some
> > rewiring, although not as much I don't think as I have CIS now. It would
> > also be considerably cheaper. So, opinions? Should I take the leap to
digi
> > and possibly squeek out a couple more HP or is it just not worth it and
I
> > should stick with the local, cheap RD head?
> > >
> > > TIA,
> > > Dan
> > >
> > >
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