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, Wed, 18 Oct 2000 15:43:58
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I don't know exactly what was replaced in the gearbox but it was
upgraded from M99 standard to use the same parts as M00 Viggen and
M00 9-5 Aero. The clutch plate was also replaced with a newer slightly
stronger version (standard in later LPT 9-5). I think Saab is using
the same gearbox parts in all gearboxes built now. Upgrading the gearbox
will be expensive (unless you can get Saab to rebuild it for free) and
perhaps not worth it (probably costs about the same if it breaks later).
Even though the engines looks similar on the outside the Aero is
different. Larger flywheel and clutch, different valves, different
turbo, different rod between piston and crankshaft, oil cooled pistons,
et.al. Some of the Aero parts migrate over to the LPT engine (just as
parts in the gearbox) as it is cheaper to just manufacture one part.
The different Aero valves, for example, is now (M01) standard on all 2.3
liter engines.
How the reliability of the LPT engine is affected by tuning to the power
levels of the Aero is entirely determined by how it is driven. The
standard followed by Saab is that the engine should survive a continuous
run at full power and load for 600 hours. The 3.0 V6 lasted for just 200
hours (Opel standard :-) before Saab modified it.
What kills a tuned LPT engine, as I understand it, is long runs at high power (high exhaust temp that kills exhaust valves, pistons, and turbo)
and too much torque at low rpms (kills the gearbox and clutch).
I've never heard of anyone that has managed to kill their engine at these
levels though. The clutch and gearbox is a different thing as I found out
in my old 9000 turbo M88. :-(
, Mon, 16 Oct 2000 17:21:09, Tue, 17 Oct 2000 16:41:27, Wed, 18 Oct 2000 11:06:50, Fri, 20 Oct 2000 08:23:19, Wed, 18 Oct 2000 15:43:58
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