In late 2006 my passion for Porsche that had been kindled by owning a boxster lead me to search for a 911. In February 2007 I found a lovely, well used 964 carrera 2 coupe in GP white and embarked on a new adventure. This running report is about my 964 that would be used for high days, holidays and track days and be a 'project car'. It wouldn't matter if it spent time waiting for things to be fixed as it wouldn't be used as a daily driver.
Saturday, 24 September 2011
So since the DIY service the last couple of months have all been about just using the car for its main purposes - tracking and touring. The trackdays were an evening session at Donington Park and the annual BoXa trackday at Rockingham. At Donington I still hadn't started tinkering with the adjustability of the KW suspension so just spent the session getting to used the more substantial grip that the KWs and Toyos have given the car. What I noticed in particular is that Old hairpin had become a full throttle corner from the apex and this was a major grin factor due to feeling the car moving around underneath me but at the same time feeling under control. Similarly the hairpin on the Melbourne loop could be taking much tighter than I could with the old set up. A 964 owning friend who came for a ride commented on how much more planted my car was on the fast corners compared to his which runs on standard suspension. However, I did notice that at the heavy braking points that the car had developed a trait of feeling quite squirrely at the back end i.e. losing grip and sliding about. So Prior to Rockingham I decided to check the rear rebound settings. This in itself is not a 5 minute job as both air box and the HVAC blower unit in the engine bay have to removed. And then the actual adjustment has to all be done by feel as you can't see what you're doing. I found that the rebound had been set at four clicks from hard so adjusted it to 8 clicks from hard. On the test drive I immediately noticed that the back end was more lively and a lot more responsive to throttle inputs i.e. be too heavy footed and it would step out. However, had this had any effect on the rear braking...well the Rockingham experiences say yes. Again Rockingham has some hard braking points and the back gripped much better because the softer rebound was allowing the shocks to keep the tyres in contact with the track better than when they were set harder. It's amazing what tiny adjustments can do to the balance of the car and even more amazing that given my limited driving skill that I can detect them. On track at Donington mixing it with the RS boys:
Thursday, 15 September 2011
This was a full weekend of graft with a couple of hours off to watch the British GP. The aim was to change the plugs, upper and lower valve cover gaskets, air filter and oil. I had also bought a new rear heat shield to replace the rusting old one. On a 964 this means removing most of the exhaust system and lots of engine covers. Here's the pile of stuff that I had to take off:
I'm pleased to report that the exhaust issue has now been remedied. The boys at Unit 11 Warrington got a new flange fabricated which is a few mm thicker than the old one. This allowed them to saw off the old flange and weld on the new so that the same spacing was retained (important to ensure that the cat could be bolted on without stressing the exhaust system). A complete new heat exchanger for that side would have cost £2,000 (and a good used one up to half that). The all in cost from Unit 11 to make and fit the new flange was a tenth of that! Here's the old flange now separated from the car:
Since buying the car I've had flaky oil pressue sender. The needle used to bounce around a was useless for getting an accurate reading. To remedy this I fitted an aftermarket sender (supposedly from a reliable source) which didn't work at all. The replacement I was sent also didn't work! These were £30 not very well spent. So at the third time of asking I got my money back on the aftermarket ones and bought one for £70 direct from Porsche. This one works like a charm and just goes to prove there are certain times when only original parts will do. Here, left to right, are the old one, the duff aftermarket one and the original Porsche one: