Mark,
I've seen the difference the fuel makes and it is a MINIMUM of 40bhp on Harvey's dyno on a restricted engine. That is a WORLD of difference in power and response of an engine running pump fuel and an engine running race fuel, when 310-320bhp is the maximum achievable on a restricted engine.

If you're really stupid enough to believe there is no significant difference between a restricted engine on high octane race fuel and one on pump fuel, then you're more stupid than I thought .

Obviously the pump fuel cars run significantly compromised compared to those that run race fuel - if there wasn't any difference, then the factory teams wouldn't be chasing every single bhp / lb ft running compression ratios in double figures . You put one of these engines on pump fuel and it wouldn't last a stage mile, that's FACT .

You can build a pump fuel rally engine, but a race fuel engine will walk all over it, so I can't understand what it is you're trying to say . It sounds like you're implying pump fuel cars run comparitive power, which is just laughable.

Unless of course you're suggesting that you can change the laws of physics in the same way that Jesus turned water to wine, you're turning Optimax to Elf turbo fuel .