So, this idea would be for a CRX? 6.5HP isn't much at all, so vehicle size is highly important. Even in a CRX I'd highly doubt you can sustain 70 mph with only 6.5 hp. I'd highly suggest plugging your numbers into our calculator here to get an idea of what you can do with 6.5hp:
Aerodynamic & rolling resistance, power & MPG calculator - EcoModder.com
I'll also suggest making a garage entry so we know what vehicles you have in the future. As someone try helping others out its really helpful to know.
