Hi Rubbond, I found this site which unfortunately relies on quarter mile timings but the formula doesn't allow for drag or power train loss etc as far as I can see. There are some other interesting formula on it though
http://www.ajdesigner.com/phphorsepo...ight_ratio.php
Sometime ago I found a site that did very accurate modelling of the effects of turbocharging your engine, it allowed for a very wide range of performance factors, but subsequently I have never been able to re-find the site. Does anyone have any pointers?
Paul