Wanted: Sport quattro (KW) head cross-section

[UrS4boy]

I am back on the case of the 16V to 20VT history story. This will include Oettinger, DRAKE and GRAF as well as the early VW 16V. I have bumped into comments from somebody at DRAKE suggesting how bad the VW 16V design was based on valve angles and the intake and exhaust port designs. On this basis, I am searching for a cross section of the Sport Quattro KW 20VT head, showing enough info to measure valve angles, etc. So far I have a KW cut-away (but not enough detail for my needs) and a very recent new "S1" head with amazing detail (but 30+ years too new). I am hoping for something like the early 16V VW brochure but for the Sport Quattro KW.

[grundey]

take a look here about VW 16V head

http://www.clubgti.com/showthread.ph...ensions-thread

[andy10v]

have bumped into comments from somebody at DRAKE suggesting how bad the VW 16V design was based on valve angles and the intake and exhaust port designs.

These ones?

http://www.not2fast.com/vw/stuff/collins.txt

[UrS4boy]

take a look here about VW 16V head

http://www.clubgti.com/showthread.ph...ensions-thread

Thanks BTDT. I also have the equivalent photos from a sliced AAN head. (very much the same).

I am specifically looking for KW 20VT sport quattro head info.

[UrS4boy]

These ones? http://www.not2fast.com/vw/stuff/collins.txt

Yes. Exactly. I also have lots of Oettinger, Drake and GRAF photos. Specifically want to see a cross-section of a KW Sport quattro head so I can figure out the differences between the KW head and an AAN head, for example.

[twoqu]

Not a cross section but a well respected journalist (Jeremy Walton) quotes Dr Fritz Indra as saying:
"The valve layout reflected this desire for compact head design too, the exhausts running parallel to the cylinder block line with the intake valves tiltled outwards at 25 degree."
Source is Audi quattro the development & competition history by Jeremy Walton. Chapter 8, P154.

[UrS4boy]

Source is Audi quattro the development & competition history by Jeremy Walton. Chapter 8, P154.

Thanks Robin. This one? http://www.abebooks.co.uk/Audi-Devel.../7031231372/bd

[twoqu]

Yep! I have what I assume is the first edition 1984! So its contemporary!

[andy10v]

A couple of articles on this page mention 25 degrees

http://www.t85q.com/quattroSportArticle.html

[UrS4boy]

A couple of articles on this page mention 25 degrees
http://www.t85q.com/quattroSportArticle.html

Andy: thanks very much for the link. I've save all the pages in that article. I notice that in addition to the "25 deg" comment they also mention "asymmetrical" which I take to mean that instead of the intake and exhaust valve stems both being 12.5 deg off the centerline of the piston, the are something like 5 degs and 20 degs. The issue now we be to figure out what the real numbers are.

I am starting to clue in that Audi would not have published a cross-section of the head back in the day because that would have been giving secrets to the enemy. Loose lips and all that.