Cam Pitting, Piston Oil Squirter Testing Without Splitting Case

[Henry Schmidt]

Originally Posted by Martinlassmann

4mm with an early 4 rip pump or 964?

Pump makes no difference.

[burgermeister]

What my rockers looked like. This is <15,000 miles of driving using BP20W50 oil.

[ahh911]

Meister,
Are these the one's you had reworked? If so, how are they doing?
Phil

[burgermeister]

Yep, John reground that set. I have not checked it over in detail, but I do peek at whatever cam lobes are visible at the annual valve adjustment, and I have not found anything. Mileage on the set is probably 20-25K. A decent amount of track use initially, though only a 2 day weekend in the last 2 years.

[Harpo]

Thanks Henry, good to know, thanks for sharing!

Originally Posted by Henry Schmidt

In my opinion the factory oil cam feed restrictor is too small.
From memory... 2.5mm. The non-restricted fitting is 6mm.
We modify the opening to 4mm. This gives us the best of both worlds.