RE: Boost -> HP??

[Todd Phenneger <phen9461@uidaho.edu>]

On Wed, 28 Oct 1998, Lewis, Gary M wrote:

> I have a chipped 5sp turbo FWD.  If anybody can point me to a HP dyno in
> LA's beautiful San Fernando Valley, I'll end the specualtion once and for
> all.  

	That would be great.

> I'd not heard this about the K24 turbo.  Better spool-up, definitely, but I
> was told that the K26 would handle more pressure.  Also, the K26 was easier
> to mod (to like a psuedo RS2) because the shaft was nearly twice the
> thickness of the K24, which was prone to schrapnel if you hung a bigger
> wheel on it.  The reason the 20vt's can handle 2.5 bar with a K24 was design
> changes in the intake and vacuum system, different from the 10vt's (hearsay,
> I've NO BTDT).

	I had not heard this about the 20vt intake/vacuum system.  Doesn't
really make sense to me though.  Why would this be so, because it flows
better?  Maybe but I still cant see it making a .5 bar difference on the
turbo.  The k26 may be eisier to mod and this will work too but k24 should
work as well.  You could modify the k26 to handle much more power, like a
psuedo RS2 I spose if you wanted to run like 2.5bar but if all you want is
2.2 I spose the faster spool up of the k24 might be nice.

> I was told 300hp was the magic number for FI mods.

	I think you need more FI mods to get 300.  BUt yes, with FI mods
you can get 300hp but you need more than 2.2bar to to this.  2.5 and an
RS2 might bring you close but I have no idea. 
	Point of Interest:  Even in the 20v, the k24 runs out of steam at
2.5.  If you really want 2.5 then go with RS2 and deal with longer spool
up times.  Just depends on what you want.  Around town, i'll take 2.2 with
k24.  On the track or for weekend car I'll take 2.5 and RS-2.  IF only I
could have both.  200q with 2.2 or 91 even better,  and a UR-Q with 20v
and 2.5. :) 
	Anyone ever ridden in a car with 3.0 bar.  Its fun.  Real fun.
Ned and Alex I think still have some minor fueling problems at that hp
though. (400?)  thats the guess in 20vt with all anciliary mods.  Just
draming or the 3rd, 4th, and 5th gear acceleration that feels like a 747
on takeoff.  In 2nd its unbelievable.  Neds car in 1st, my hat flew off
and hit the rear window.  :)  I spose Carl Jerrits car is close.  Anyone
else have power at this level on the list???  Didn't someone just go 2.5
or 3.0 with their S6?

> I'm not arguing with Todd, I'm trying to resolve these issues.  I have
> recently purchased an 88 5kcstq, and would like to make it faster (or at
> least as fast) as my 86 5kcst 5sp.  Due to FWD, I'm afraid to go more than
> 1.8 bar in the 86.  In the 88, I figure I can go to 2.2 bar with a fair
> margin of comfort.  If all I need is a K24 and 91 200tq IC (and a chip),
> great.  But I was under the impression that I needed a reworked K26 (or
> RS2),and a custom all aluminum single pass IC.

	I think Turbo and IC are mandatory for 2.2.  dI know turbo is but
I think k24 will work but I would think 91 IC would work.  CUstom single
pass even better though.   L8R
Todd