New Project Update 7th December 2003
Update 7th December 2003
If you wish to view previous work then links to updates are above. Work before this date was organised in sections (chassis, engine, bodywork etc) you can see this work by going to "New Project Title Page" above.
I am sorry about the lack of pictures recently, but there has not been
that much new and interesting to photograph. The work has mainly been assembly.
The car is now mechanically complete. The engine runs, the clutch and gearbox work and the rear wheels spin. I had a few problems. The clutch bled very easily and worked for a while but then suddenly leaked fluid. The leaks came from a couple of the fittings, not where I had attached the braided hose but the actual conical seal. The leaks were easily rectified by fitting a soft aluminium cone (see below).
All the plumbing is complete. I had a couple of fuel leaks from the tank. Where the wires for the pumps pass through the top plate on the tank petrol was coming up the inside of the heat shrink. Also there was a slight weep from the fuel return plate, rectified by fitting a redesigned gasket.
To get the engine running I was able to check that everything worked before actual fire up. Oil was added and the pump turned with a drill. I turned the pump for over 5 minutes and there were no leaks and the oil level in the tank did not drop, proving that the scavenge is working. Oil pressure was also good.
By turning the engine by hand I could get a spark, proving the ignition worked, but I could not get a click from the injectors. The problem was traced to an incorrectly supplied relay. I had been given a change over relay instead of a relay that switched both pair of contacts.
The rev counter did not work either, even though it was wired as suggested. From the ECU there is a wire that supplies pulses for a tach., however the signal is very weak and would not give a signal that I required. I ended up taking a signal just before my coil pack.
When the engine fired I had to maintain higher revs than tickover to bed the cams for 20 minutes. The engine ran nicely but the noise from my expansion chamber was horrendous, like a 2 stroke but louder. I think it was giving a very strong pulse and sucking fuel through the valves on overlap which was burning in the exhaust and creating a lot of heat and noise. I have had to remove the chamber and replace it with a silencer. The car is now quiet, the exhaust system a lot cooler and the exhaust very rich. I will play with the chamber at a later date.
I am now working on the moulds for the wings. The front moulds are now layed up, and work will start on the rears.
All that is left to do on the car is the detachable body work, the hood and frame, wire the lights attached to the panels and tune the engine!
|There are 14 pictures on this page, posted 7th December 2003|