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Last track day before lock-down. Friday March 13 ...
big BANG at the middle of the straight, impressive cloud trailing the car.
After 10,000 track only km, finally a piston rod gave up; as result a fatal engine crash.
It was a shame, as it was the plan to give the engine a complete rebuild with update to 3.8L in May this year.
So the question was, what could be salvaged from the old engine?
The answer, not much ...
More or less everything in between the cylinder-heads was a goner
housing, crank shaft, intermittent shaft, oil pump, cylinders, pistons, rods ... all goner.
So what to do?
For a 3.8L upgrade a lot of stuff would be reusable, but these parts are mostly all gone ... so why not go for 4.0L than, as all parts have to be new anyway?
Last track day before lock-down. Friday March 13 ...
big BANG at the middle of the straight, impressive cloud trailing the car.
After 10,000 track only km, finally a piston rod gave up; as result a fatal engine crash.
It was a shame, as it was the plan to give the engine a complete rebuild with update to 3.8L in May this year.
So the question was, what could be salvaged from the old engine?
The answer, not much ...
More or less everything in between the cylinder-heads was a goner
housing, crank shaft, intermittent shaft, oil pump, cylinders, pistons, rods ... all goner.
So what to do?
For a 3.8L upgrade a lot of stuff would be reusable, but these parts are mostly all gone ... so why not go for 4.0L than, as all parts have to be new anyway?
That is the plan!
Ouch!
Good luck with the rebuild, in whatever direction you go!
very difficult to say ...
The mechanic was able to locate pretty clear the failed rod as cause.
He mentioned broken bolt or rod failure, not clear. On thing is that the rods in early engines ('94) were 'lighter' than the later ones ...
And yes we went the 4.0L way, details will follow.
As there is mostly no seriously to consider engine expert for the 993 here in the UAE, except one, there is also no machineshop for the needed work on some parts as i.e. the heads. Therefore it was clear for a long time to send the engine to Germany for the rebuild. I met Christian Treiber the first time in the Philippines when i chased down this beauty Outlaw 4.0 . As said, the plan was to build a 3.8L , circumstances opened the opportunity to go for the 4.0L. And so we went ...
Due to Corona, a lot of stuff could only be realized in slow motions, as e.g. shipping, machine work, parts supply etc..
First step was to get the parts together
Machined cylinder heads with bigger valves and extended inlets
very difficult to say ...
The mechanic was able to locate pretty clear the failed rod as cause.
He mentioned broken bolt or rod failure, not clear. On thing is that the rods in early engines ('94) were 'lighter' than the later ones ...
And yes we went the 4.0L way, details will follow.
It’s known that the early ones had some uniqueness. Build date for yours? What’s the part number and can you weight one for us when the chance provides.
Engine has to be built before April '94
Otherwise, sorry not sure ..
Has to come out of the first mentioned group based on the engine # M64.08 64R 507xx
As described earlier, this is a Tiptronic car
Beside its unique status here in the UAE, and its much better performance against typical opinion (from mostly guys who never drove one), it limits right now the actual possible / acceptable torque output.
Over the years, the car built happened in stages like suspension, chassis, now engine and so on.
With the actual setup, we don't even have to change the intake system to reach the max desired hp/torque values. Means also that it will be a very reliable engine.
However, we discussing already the possible implementation of a 996 GT3 gearbox, re-geared. It's actual cheaper as the nowadays ridiculous asking prices for abused manual 993 gearboxes.
If that is done the engine upgrade stage 2 (intake, ECU etc) would follow.
Today, the engine is mostly done. Hope to ship it coming week
still needed for street use (will be ECU controlled)
Dates are known. But there was always an outlier with Porsche. Hence why I asked
same can be said about the g50 that isn’t welded with 1 & 2
Just found this in my collection of writeups. Not sure if it helps but who knows ...
5. Es gibt laut Leitfaden drei Baustände des Pleuels. Der erste abgespeckte Baustand geht bis Motornummer 63 S 02521. Der Baustand 2 bis 63 S 05848. Ab Modelljahr 96 wurden im Baustand 3 die Pleuel des Turbo verwendet. Bei Baustand 1 gab es mehrere bekannte Pleuel-Abrisse bei Leistungssteigerung und/oder hohen Dauerdrehzahlen. (Behebung Sauteuer)
quick translate:
5. According to the guidelines, there are three construction stages of the connecting rod. The first slimmed-down construction stage goes up to engine number 63 S 02521. Construction stage 2 to 63 S 05848. From model year 96, the connecting rods of the turbo were used in construction stage 3. In construction stage 1, there were several known torn-off connecting rods in case of power increase and / or high continuous reffing. (Remedy freaking expensive)
12-03-2019, 05:03 AM
