Dan Bingham brought his 1973 VW Beetle in for a setup on the rolling road. The Beetle has just received a pair of Weber IDF’s. We set his ignition timing, balanced the carbs and set the idle mixture and speed before running it on the rollers. A quick change of the main jets saw the CO up to 5.65%. Spot on.
A late model Spitfire with 2500cc straight six and carburetors and a 2500 PI with fuel injection. The Spitfire suffered from a misfire at higher revs. Insufficient fuel supply saw the installation of a new Facet fuel pump. A straight forward setup and power run and it is ready for a track day. The PI was suffering from fouled plugs on 4, 5 and 6 and rich running. This was due to a worn out fuel metering unit. A replacement refurbished metering unit was installed and all throttle bodies balanced.
An unusual racing car perhaps, but in Group 1 trim should fair quite well. The car shares the same 3.0 litre fuel injected engine as the 3.0 CSL. Group 1 regulations are far more restrictive of course but it should still hustle along fairly well, especially on a fast circuit. The car came in for a roll cage and a coat of paint in period livery.
Dave Broughton of 911 Classics brought us a 911 race car running Bosch slide throttle fuel injection. The car was not running right so Dave asked us to put it on the rollers and find out what was going wrong. Graham ran the car up on the rollers and found that it was massively weak. Only 2.04% Co. An adjustment to the injection pump put that right bringing the Co’s up to 6%. The 911 is now delivering 198bhp at the wheels.
The small bore engine is in the subframe and yesterday we lifted the pickup body over the top and dropped it on. We are currently fitting up the brakes, wiring and plumbing before the Shorrock super charger goes in. This will be a very unique little pickup when its done.
