Interesting thread.
A few comments/observations from me. I have just bought a 325 e30 86 vintage which I will take some weight out of, lower to drop the centre of gravity, polly bush, fit the lightest rims and tyres I can to reduce unsprung weight and balance as best I can via setting upfrom a corner weight perspective. This will be used as the winter hacker as my fisher fury kit car with aero screen is just too cold to use through another winter. If the e30 is even near to a 7.5 second car I would be surprised but who cares? Quick cars are only quick with people driving them who know how to make them go quick. Other than a drag away from the lights 0-60 has little relevance! The ability to carry corner apex speed, brake, turn and accelerate is what in my mind makes for fun with a car.
My fisher fury has a blown pinto engine in it. It weighed 537 kgs last year and was rolling roaded at 148 bhp at the wheels, so not too different from a 325.
I can only get a mid 5 second 0-60 with this but the torque of the blown engine combined with little mass makes for explosive overtaking acceleration.
My points are this
Power to weight is what makes for a quick car.
Torque is where its at!
Unsprung weight makes a big difference to how a car handles
0-60 is not impotant to having fun!
Just my tuppence worth. Rambling on as usual! In summary, no way will you get sub 7 second with a standard 2.5 e30!
