Re: Temperature and Air Volume
Cooler denser air improves power in any engine. You just feel it more with these marginal china girls. Mine all respond big time to fall weather conditions with much peppier performance and better mileage.
I'd say the difference between 90deg days and 70deg days is at least 1hp...minimum!
Maybe quite a bit more depending on your particular jetting and setup...
If more is better, then too much is just enough.
If you can't afford it, build it yourself.