Quote:
Originally Posted by Eisenheim
I'm particularly curious about the engine rebuild and the Garrett GT35R Turbo. Is it normal for these cars – 964 Turbos to require rebuilds every +/- 100k miles? Is it common to see Garrett GT35R Turbo’s added as an upgrade to these cars?
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Difficult to put a precise mileage number on engine rebuild needed, but the higher head and cylinder temps and pressures of the turbo engines are hard on the valvetrain, and if owners turn up the boost with reckless abandon, then the piston rings and ringlands take a beating from detonation. I see that a cam change was done, so maybe the complete rebuild was part of the "while you're in there" bit, or perhaps high cylinder leakage numbers showed up during a service (not to mention that that engine had the lame-o dilivar head studs, top and bottom, that are prone to breakage, and/or insufficient clamping force that leads to fretting of the cylinder head/cylinder mating surface . . . it wasn't unit the 993TT that Porsche got the studs right - a many decade joke, really).
The Garrett GT35R turbo is a common unit used by people who mod and are willing to have some light fab work done to exhaust plumbing . . . I've never been in a Turbo with on of those, but many who have used them in the 930 Forum say that they are most excellent and a big improvement over even the 3K K27 7200 turbochargers that came on those cars (which are themselves a huge improvement over the horrendous, 3K 3LDZ that Porsche used from the 1976-1990).
Seeing in the listing that the car has a modified WUR is a good sign; you can't put a turbocharger like that on one of these without making the WUR adjustable (particularly for full throttle enrichment control pressure) without asking for big trouble (detonation under boost).
The air-to-fuel ratio instrument installed in the tach is super cool (and very useful)!