New windscreen wiper arms (Jul 10)

With all the exciting stuff finished it was time to attend to a few mundane jobs.

First up was to change the 964's almost useless wiper arms....I think they're designed to slow you down to 30 mph when it's raining because you can't see!

At the end of the model line Porsche replaced the weedy single sprint wiper arms with more beefy double spring versions. Here's one old and one new fitted:



Pic showing the two springs on the new one and single spring on the old one:



They look a bit more meaty now and should do a better job clearing the water away



The pictures above show that I initially fitted Bosch wiper blades. These turned out to be very poor so I changed them to Porsche original. The latter are much more delicate and for that reason fit and clear the screen better.

First trackday after rebuild (Jun 10)

By the middle of May I'd done the required 1,000 miles running in (nothing over 4,500 rpm) and it was back to Unit 11 to have a check over, the valves adjusted and the thin mineral oil replaced with Mobil 15W-50 Mobil motorsport oil. I could then drive it as intended and see what difference the rebuild had made.

June arrived soon and it was time to test it out at at Oulton Park.








The engine performed flawlessly, although I can say that I didn't push it too hard on its first time out. At this stage I didn't really think that the engine felt like it had any more 'go' than it did before the rebuild.

This was also the first time I got to noise test it with the cat bypass fitted. We had a concern that it could be too loud if the secondary bypass (cup pipe) was also left on so the normal secondary silencer was fitted instead. As it happens the reading was only 98 db which means it should have no problems at any track.

At the end of the day I was getting some brake judder which was most likely due to uneven pad deposits on the disks. I think this might have been caused by the disks getting a bit on the thin side (they're all 3 years old now) and getting hotter than normal so I'll be putting new discs/pads on before the next trackday in late July.