re. Question for you turbo experts...

[Ben Swann]

[Ok, have an application question here....

I'm contimplating switching the turbo in my 86 5ktq to a K24.  IF I do this
conversion, what is the OPTIMAL boost pressure for that turbo, while
keeping
the rest of the motor stock.  I will be installing a bypass valve as well,
but no other real modifications at this time.  I already have a QLCC chip
installed with a 1.8 bar spring.

I know the K24 spools up faster and the K26 has a higher top end, but
someone on here did a bit of comparision with a lower amount of boost on a
K24 and it seemed to pull better.

Anyone have any thoughts on this?

Rob

86 5ktq
89 200tqa]

Rob,

OK - no expert here - ex=has been & spurt is a drip under pressure.

As I've been learning more, thanks to the list people like Javad, SJ, SJM
and others, as well as other sources of info.  It is not just the level of
boost pressure attained, but velocity and lower back-pressure, but not as
much diameter increase as on a NA engine.  With a stock setup(either turbo)
I'd hazard an educated guess that around 2 Bar would be optimal.  Anymore,
and you are just forcing air.

Removing the bottlenecks increase effeciency and performance - Manifold,
Exhaust, Intercooler, proper CAM etc..will all result in gains, especially
when done in conjunction, without actually seeing additional boost
pressure.

Yes?

Ben

'87 5kcstww - QLCC + other combined mods - running around 2 Bar 'cause
anymore just causes trouble with little gain.  Flow to be increased with
Stebro exhaust and cat., ELGIN 264i/260e cam,  2-piece manifold, little bit
o' portin, some more fuel, bypass valve, and a proper intercooler when I
can find one that I can afford.