The next challenge was to get the gears working. I endlessly power bled the clutch, and tried to drive the car on the stands . I could not select any gear with the engine running, let alone reverse which would not select even at rest.
On the Friday, with the rolling road session booked for Monday, I had to pay over the odds for a clutch master cylinder. This is a tiny cylinder above the clutch pedal that upon inspection was damp, suggesting to me that it was letting fluid out and air in. I spent the Saturday under the pedals with my legs poking up over the seat which I had refitted in a brilliant act of masochism only days before.
I didn’t work - I had a pedal but no clutch.
With one day to go I resigned myself to taking the gearbox off and inspecting the clutch, so that’s what I did.
I didn’t actually find anything. I was going to refit my original box but I need to get the LSD looked at, and in any case, the box would not stop the clutch working unless the thrust bearing / arm were damaged or missing. They weren’t.
I decided to change the clutch / I had a good one on the shelf and it ruled out the paddle clutch which I have never got on with that well. For a competition clutch it was too slow to release, and made you sound like granny riding the clutch. Not a good fit.
I bled it again, the same way I had 59 times that week it seemed and blow me it worked. I had a clutch.
So I made it to Wayne’s with the body panels fitted up and no reverse gear. We used the winch to get it in his workshop after I rolled it down off the trailer. It started, ran but had not been run in. We did what we could to run in the rollers before giving it some abuse, but fortunately it had only had shells and no machining etc so was not the first engine to go pretty much straight into service this way.
Not used to the ‘four times is a charm’, Wayne flattened the battery and we lost some running time so reinvested that in making my spare ECU recognise the car (immobiliser chip) and copying the code from my old ECU onto it as a base map.
The day was a success overall, and as many of you know Wayne is a genius and a great guy. We got 285bhp and 250 ft lbs of torque which is a bit down on what I had hoped. Using the Championship method of calculating gearbox losses this is more like 295bhp, so just shy of what it would be as standard in a 996. The issue, Wayne believes, is getting v enough air in the tiny side intake in a 996 versus the much better over car airflow and short inlet tract on a 996.
So I then had 4 days to sort the gears. It took some working out too. Everything pointed to the cables, so I changed brackets, bent them etc to try and gain more ‘pull’ on the cables where needed. This didn’t work.
I then had the brainwave to remove the cables where needed consol completely, and move them manually. With the car in the air, and the battery charged, I would jump in the car, start it and lift the clutch on tickover. Reverse is easy to see, or would be if the wheels went backwards, but they didn’t. They went forwards.
1st gear = 7mph
2nd = 14mph
3rd =21mph
4th = 28mph
5th - missing in action
Even moving the linkage into the positions they should be in gave me no reverse or 5th. I took some measurements of the orientation of the linkage and it was clear that it could not physically get to that plane. The reason?
Somewhere along the line, this spare box I have never used has seen some action with a trolley jack which bent it. If I undid it completely, the linkage could move enough to get 5th / reverse. So, the simple solution was to make some spacers that allowed enough movement for the linkage to move enough. I have a 3rd spare box which I can swap this out completely on time, but this was one day before the first event!
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