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RE: Colors under the hood, longish (heat, crossflow heads)
> Date: Wed, 8 Apr 1998 22:26:40 -0600
> From: "Frank Amoroso" <email@example.com>
> Subject: Re: Colors under the hood, longish.
> If I recall correctly the 944 turbo takes this a step further by positioning
> the turbo on the intake side. Cool.
Nope, Dad's 951 has turbo pretty low on exhaust side after a longish two-piece
EM (starter is underneath/towards intake side), intake flow goes through
intercooler in front over to the other side. It's a crossflow head, anyway,
with the cam in a superstructure and cover on top of the actual "head".
Distributor on front of cam, block canted at about 20 degrees, and it's all
packed in there pretty good and tight.
Might get to drive it down to PowerHaus (Tempe) in a couple weeks to see if
they can fix the lack of boost over 5k. Maybe it's really detecting knock from
our lower-octane (high-altitude) gas - 91 (R+M)/2 is all we can get here, my q
is happy but Dad might have got a head that was milled as well as ported.
> - -----
> From: Phil Payne <firstname.lastname@example.org>
> >Back on topic - the _major_ weakness of the I5 10V engine in turbo form
> >is that the bits that have to be cold and the bits that get hot are on
> >the same side of the engine block. In my (not so humble) opinion,
> >the _major_ improvement in the 20V engine is not the over-complicated
> >valve gear or the Motronic controller - as good as both are. It's the
> >fact that the hot bits and the cold bits are separated by the engine
> > Phil Payne
> > Phone: 0385 302803 Fax: 01536 723021
> > (The contents of this post will _NOT_ appear in the UK Newsletter.)
1991 200 quattro, 87k, crossflow head, no pinging on 91 octane,
1988 GTI 16v, 175k, crossflow head, runs fine on 85 octane @ 4700' except a
little ping on snap throttle opening (so don't do that)