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Dependability? I bought my 89K 1986 turbo in 1997. Since then it has run slightly over 100 DE's. When I first got it, I put a K27 on it, MAF, and have run 1.1 bars boost with 3 bars FP. Admittedly, it has two oil coolers and a channeled/doored oil pan and has had an oil change every third DE plus rod bearings at 125K. Other than a wiring problem and the standard Porsche oil leaks, it has never broken. It now has 174K on it and runs as well as it ever did. It is on its second K27 and has an upgraded head gasket that was installed in 1998 when the turbo was first upgraded.
It is a reasonably fast car. I do not run the engine over the original redline of 6.4 although the chips allow 7K. Maybe that is why it has remained intact. If you maintain these things and stay away from high rpms, they tend to last a long time.
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Lawrence
1986 951
2002 SLK32 AMG
1987 328GTS
2011 528i
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