.21 Engine Extreme Race Tunning?
 

How to tune an engine to extreme race tunning?
Some drivers they tune their engine very lean, and the result is
crazy speed.
When we're tunning the engine to race tune, what should we do?
Is it difficult to set up the clutch when the engine is in Race Tunning?

The leaner you drive the engine, the faster you go, until some point. You sould check the engine temperature, feel the throttle response, see how the smoke comes out when you accelerate....

It's always a combination of engine-tuning / clutch tuning / chassis tuning / driving style, everything affects on everything. Oh and of course the weather plays a big factor too.

So my advise is, if you're not sure, keep it on a safe side and drive it a little bit rich.....

-X-