Originally Posted by fyrstormer

I ran the car with the body off today to see how much speed was being sacrificed to generate downforce. The car went 2mph faster, and was significantly harder to control. Obviously that energy is being put to good use keeping the tires stuck to the ground instead of making the car go faster, but damn I wish I knew where the extra power is hiding. I leaned-out the fuel mixture a bit and it *still* goes 45mph with the body on. It just seems implausible that all these changes I'm making could have no measurable effect whatsoever. Even the exhaust note is the same pitch at top speed, so the GPS speed readings are definitely accurate.

The only things I haven't tried at this point are:
- Hotter/colder glowplug (maybe advancing the ignition would help? I dunno, but I don't want to waste a new glowplug to test it; maybe I can get away with borrowing a hot plug from a different engine)
- Higher gearing (unlikely to do anything at all unless the engine is operating significantly above its power peak at its current top speed)
- Degrease all bearings and re-lubricate with oil (impractical for a basher vehicle)
- Replace the T3.0 carburetor with the stock carburetor (this would decrease the venturi size, which I'm pretty sure would *reduce* its top speed, unless there's something I'm misunderstanding)