questions about a turbo cam for 5kcstq/4kstq

[Ken Keith]

Robert Deis <rdeis at io.com> wrote:
>
> This includes a high rpm cam, but from what I've seen on non-audi turbos
> the cam comes late in the game because intake and exhaust plumbing provide 
> a much greater benefit with fewer side effects (if any) and at a lower
> cost in time and $$.

When you say late in the game, you are refering to the sequence 
of upgrades, right?  As in chip/WG spring, exhaust, intake filter, 
porting/polishing/extrudehoning, and such?  

The other meaning you may have meant is when the power comes 
on in the rpm band "game".
 
> If you're interested in getting the power on low in the rpm band before
> the boost kicks in, you're prolly best off with a stock cam because
> factory engineers tend to cheat their designs toward this direction at the
> expense of top-end power anyway.

Darn.  I am interested in low end power.  I already have the n/a 
cam.  I still wonder if there are any stock or aftermarket cams that 
are biased towards low rpm power.  Don't get me wrong, I want 
high end power too.  I just feel like that will be handled by the turbo 
at some point.

I guess I could get an adjustable cam gear, and (let me see if I get 
this right), retard it to shift the powerband lower.  (is that the right 
direction?)  Am I being too simplistic about their application?
  
> > I understand valve overlap is undesirable in a turbo engine, since it 
> > will result in blowing boosted fuel mixture out the exhaust valves 
> > and system.  Is this bad for power, or just fuel economy and the 
> > environment?
> 
> And probably the manifold and turbo- that *could* act just like an
> afterburner..  Some rally cars do this on purpose to prevent turbo lag.

What's this I hear about people putting a spark plug in the exhaust, 
to light off unburnt fuel?  What triggers the spark?  What does it 
run off of?

I guess the EM heat in itself is enough to light off a rich mixture, 
since a souped up Corrado G60 will spit flames upon shifting.  This 
is without a spark plug in the exhaust, and even without a hot turbo.

Did I mention that I'm curious about putting nitrous on my 4kstq 
project?  I've got a partial setup.  Is anyone running NOS on this 
list?

Thanks,

Ken