Re: (tech)2.0 L 16V Build.

[MIKE BLAIN <reptileis@home.com>]

Thats great info Riley.

One of the things that I am completely in the dark about is - if I run a TDI
crank( 95.5mm), will the height requirements of the pistons change? as well as
the lengths of the valve stems?


Riley McDowall wrote:

> At 9:43 PM -0800 3/1/01, MIKE BLAIN wrote:
> > Here is the goal-    2.0L 16 V - with 1.8L head, Scirocco 16V Exhaust
> >Manifold, Polished Intake Manifold.    I want 180 hp (total) I want more
> >bottom end then top speed.  The car will be a daily driver for the most
>
> I know Brett's already mentioned this, but I dont' think you're going to be
> able to have your cake AND eat it too.  You can either have A) 180hp or B)
> a torquey daily driver.  Unless you get into nitrous or a forced-induction
> situation, you won't be able to maintain great torque characteristics at
> reasonable rpms.  To get to 180hp, you'll need to get into cams that
> sacrifice torque below 4000rpm.  Unfortunately, there's no way around that,
> especially if you plan on sticking with CIS-E.
>
> >I NEED
> >1)Valves-   high performance?  what brands?  will the lengths change or
> >stem thicknesses?
>
> Really the only option you have when it comes to valves is using stainless
> steel.  From what I recall, the advantage in using stainless valves is
> their ability to stay clean - carbon doesn't build up on them like it does
> on the OE steel ones.  You might also be able to thin the stems down a bit
> when you port the head, but that's a really minor issue.
>
> >2) springs-
>
> The general consensus is to get either TT or Schrick valve springs if you
> plan on using cams more extreme than a 260.  You should look at the lift
> numbers, but that's a rule of thumb that most people use.
>
> >3) cams. I want schricks-  should I run 276 or 286 or?   remember this
> >is a daily driver.
>
> The biggest cams you can use while keeping your lifters hydraulic are the
> Schrick 276es.  If you care about beating people in stoplight drags, don't
> buy these cams :)  Get the 268s, or better yet, get an asymmetric set (260
> intake w/276 exhaust).  I can pretty much guarantee you'll like the torque
> characteristics of this set better than a set of 268s.  You don't have to
> use Schricks, either - I've got Pipers, and there's no reason why you
> couldn't put together a similar set from what Kent offers.
>
> >4) crankshaft-  I heard something about getting the "diesel" crank.  and
> >then something about a TDI? should I just maintain with the stock crank?
>
> A TDI crankshaft might get you to 180hp + the torque you want.  I've never
> seen one dynoed though... Be aware that you'll sacrifice your high-rev
> capability, though, and plan accordingly - get a set of torquey, midrange
> cams (like the Schrick 260s, or Autotech's, or the upcoming TT cams).
>
> >5)Lifters
>
> Just get new ones... peace of mind is good :)
>
> As far as the rest of the head goes, while you're getting it ported and
> polished, make sure it gets a rebuild too.  New lifters, new cam chain, new
> springs (if necessary), new seals, etc.  The last thing you want to do is
> spend all this money and then have to go back into the head a month later
> to fix a failed lifter.
>
> The only other thing I can think of is a VW Motorsport head gasket.  It'll
> raise your compression ratio, which will give you a bit more torque, but
> will probably require at least 92 octane...
>
> HTH!


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