re. Turbo convertors type 85

[JShadzi at aol.com]

Basically the idea is that you "bolt on" all the relevant turbo parts, but keep intact the stock fuel/igniton system parts and motor.  My recommendation would be to leave your motor as is, but use the MC turbo and manifold parts (from an 85 or 86 5kt) including the exh. manifold, K26 turbo (becuase they are a dime a dozen), downpipe (which will require adapting to your stock cat, wastegate, etc.  The intake manifold is up to you, you can try to keep the stock or using the MC intake is a nice way to go too.

Most of the K26 turbos are watercooled also unless you go with one of the earlier oil only turbos, which are not as good and not recommended.  Its not too difficult to adapt the water provisions, you can tap into the heater core hoses for coolant in and into the upper water outlet at the head for water out of the turbo.  Oiling will need to be adapted, you can drill and tap the bottom of the block for the oil return, and pressurized oil can be tapped off the oil filter housing quite easily.  Granted, the MC bottom end makes these adaptations easier beause it already has the provisions for the oil/water.

Basically you are reconfiguring your intake plumbing and exh. manifold, its not rocket science, the idea is that your CIS-E fuel system can support quite a bit more hp that the 115 its supplying right now, 175hp or so approximately.

You can read a write up about a conversion I did here :  http://marcswanson.ne.mediaone.net/%7Ejshadzi/80_turbo.html

Feel free to shoot any specific questions my way.

Javad
80tq.com

> Not that I would ever be disappointed by the power output of my 4kq,
> especially not after having spent a weekend driving my Porsche, but what
> all is required to do a callaway style conversion on a 4kq?
> I know Mr. Gough has done one of these, and I have his old explanation
> around somewhere in my e-mail, but I don't remember a final write up.
> I have read that the 5k turbo diesel turbo and downpipe have been used,
> and Matt mentioned using a k26 from a urq.
> Are all of these turbos oil cooled?
>
> What were he details of the conversions you have driven in Javad?
>
> Thanks!
> Greg Roa
> Cincinnati, OH
> 86' 4kcsq  (getting prepped for a paint job finally)
> 93' 90 CS
> 83' 944  (out of hibernation over the weekend)
>
> >From: JShadzi at aol.com
> >Date: Mon, 11 Feb 2002 10:28:15 EST
> >Subject: Re: re. Turbo convertors type 85
> >To: bswann at worldnet.att.net
> >Cc: Quattro at audifans.com
> >
> >Ben,
> >
> >There is no reason to think that a properly set up "Calloway"
> conversion will
> >not hold up.  The bottom end of a 4kq does not differ too greatly from
> the
> >RS2 bottom end believe it or not.  The 4kq motor in general is VERY
> >understressed, it has potential to run all day at easily twice the
> output.
> >The stock CIS, CIS-E and CIS-3 fuel systems can all safely fuel to
> 8-10psi
> >with good fuel ratios, easily.  You don't need the MC management swap
> to run
> >that level of boost with a K24 or 26.  Also, timing should be set to 6
> btdc.
> >I've driven such conversions over 40k miles commuting, no reason to
> think
> >that it won't hold up.
> >
> >Mike mentioned blowing head gasket running 18psi, this IMO is out of
> the
> >stock fuel systems capabilities, and I don't know first hand how he was
> >making up for the extra fueling, but with the proper supplemental
> fueling
> >devices that shouldn't be a problem either.
> >
> >Javad