Quote:
Originally Posted by scarceller
After reading this great thread I see that Porsche introduced these restrictors in the 964 (early 90s).
I'm wondering if the engine had anything else changed at the time that the restrictors where introduced?
For example: did the oil pump change significantly at the same time? Or anything else oil related?
The reason I'm curious about these questions is to be sure that I don't put these restrictors into a 84-89 3.2L that does not have all the required factory mods that go along with the restrictors.
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Yes, the 964 did receive a higher flowing oil pump. Not sure about any other changes in the oil system. However, apparently Porsche sent a technical bulletin out to install the restrictors (er controllers) on older cars as well. Read more on Rennlist.com. Go to forums, 911. Search for "911 camshaft oiling update - anyone done this ?" A lot more info to consider there.