CIS turbo power/boost limits

[james accordino]

--- Q <Q at intendedacceleration.com> wrote:
> Jukka & all.
> 
> I think the folks have several articles mixed
> together.
> 
> Using a stock turbo. . . I could easily get about 18
> to 19 psig with
> slightly lower control pressure.  Two European car
> articles were done with
> good gas 104 octane. (artistic license or something)
> 
> I tweaked some things to get the 2.4 bar.  Yes
> things were stressed and a
> little hot, but race gas is like an insurance
> policy.
> 
> On a turbo coupe with a 20V CIS head I've even seen
> 30 psi and severely
> heated air using a stock turbo.  Yes the compression
> was 5.5 to 1, a
> Colorado Car.  It could do a 4 wheel smoking start
> and leave a sport Q (Oh,
> all right for only the first 500 feet)
> 
> 
> On Carl Jerritts car there was an RS2 turbo
> Some Mercedes injectors with increased fuel pressure
> (shim method)
> 16" x 16" x 3" intercooler
> and other stuff I can't remember now.
> 
> We saw 25 psig briefly several times (I didn't want
> to push someone else's
> car) when Carl & I were playing at Second Creek,
> outside of Denver with Karl
> Baehre of Prestige Audi.
> 
> Audi Sport had, but no longer available, an air
> meter with a donut around
> the sensor plate to change the air flow.  I've used
> it also for about 320ish
> hp on the turbo coupe cars.  When I bought mine I
> think they had 4 left.
> 
> Now that I think about it I bought it back from the
> guy when he installed a
> AAN engine.  It must be around somewhere.  It
> delevers so much fuel that you
> have to use a control pressure regulator from a VW
> that is set for about 94
> psi or the engine drowns in fuel.
> 
> The Rally Version used Bosch B 438 105 255  If you
> can find one they are
> worth new $2200.00 US

Ned, thanks for the info.  You obviously seem to have
a wealth of info WRT the turbo I-5.  I'm sure I could
bench race with you all day and learn a ton.  Maybe
you could help me with a small question.  Where can I
get some gut parts for the metering head?  O-rings,
and other parts?  Do they make them in Viton now?

Thanks
Jim Accordino