Planet-9

Does the Rev limiter really protect the engine?

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YOUR RESEARCHDoes the Rev limiter really protect the engine?

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POST 1Original post

After reading this: If so, before you put in your offer ask for a print out of the engine history. The car records every spark of a plug in the critical rpm ranges, even when it happened in the life of the engine. It's like a number of copies for a copier. The range is broken down into 1-4 or 1-6 zones. You don't want to see any zone 2 and up firings and zone one fires of 80k and above means the car has been abused. That information is straight from the the horses mouth (Porsche's SoCal Regional Service Manager - last night). Does the rev limiter protect the engine from being abused?

POST 2Original post

Yes and No. First, you should realize that most early Caymans have an error in their programming that falsely reports revs across all rev zones - see my posting about the lifter replacement I had and what my shop found in terms of over revs and what Porsche did to correct it. Second, the rev limiter protects you on the way up to redline, but does not protect you from missing a shift and say going from 3rd to 1st and over-reving because of it. You are correct that this information is stored in the ECU. However, there is an ECU tuning solution coming shortly that will let you check your own over revs and erase them should you not wish to share that information with your dealership.

POST 3Original post

OK, I found your previous threads on the subject. Thanks.

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