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

[scirocco81 at vwmail.net (Eric S)]

Whomever you were speaking with was smoking crack.  CIS-E and the knock system are separate, and you can use the knock system on a car with straight CIS.

Here, this should clear things up:

http://www.driversfound.com/scirocco/techtips/engine/knocksensor/

--
Eric
www.VintageWatercooleds.com

79 VW Iltis
81 Scirocco S (*TDI* swap and complete restoration in holding pattern)
81 Rabbit Truck LX Diesel (FOR SALE!)
81 Rabbit Truck 2.0 16v Motronic
83 Scirocco Wolfsburg
91 Cabriolet (2.0 Crossflow 8v swap and mechanical rebuild in progress)


--- Dan Smith <sad_rocc@yahoo.com> wrote:
>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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