11-Dec-2009

The brake upgrade is complete and there is a definite improvement. However I’m still not happy with the handling of the car. I think there are a number of issues that are causing this but the main problem with the Marcos is that if you adjust the suspension it affects the front wheel geometry. Since the front suspension wishbones are not adjustable you have no way of correcting the geometry when you adjust the springs/ride height. On a Triumph car the suspension mounts bolt on so it’s possible to place shims behind the mounts to correct the steering geometry, but when they made the Marcos they decided to weld them in place. I have basically come to the conclusion that I need to have adjustable top wishbones made. This means I can set the springs up correctly to get the correct ride height (maybe even have the corner weight set up). Once this is done I can then adjust the front suspension to get the correct camber and caster. I also think I need more adjustment on the rear axle as only one of my radius rods is adjustable so I will probably modify the rest so they can all be adjusted. Hopefully I can get these mods done over the next few weeks so I can then spend some time getting the suspension set up correctly.
The rebuilt gear box and overdrive also worked but it seems to have a bad oil leak between the overdrive and gearbox. When I was rebuilding it I noticed the aluminum overdrive to gearbox adapter was slightly warped but I was hopping using lots of gasket sealer would work. Turns out it didn’t so I will need to remove the gearbox again to replace the gasket and possibly have the adapter skimmed at the machine shop. Looks like nothing is ever simple on a Marcos!