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Originally Posted by vwbloodline
I didnt know for sure where to post this so here it goes. First off thank you to everyone who has answered my questions in the past you have been a great help to me.
Realistically how would a 220hp/200ft 2500lb mid engine Karmann Ghia drive. I am looking to get a loan and start building my daily driver and was wondering how a car that light and that much power would be like to drive. I will be using an ej20t and the subaru transmission. With that said how would a 300hp/300ft Subaru engine and transmission driving experience be. I assume no one has done that but I am new to building a mid engine car and was wondering was equivalency it would be in terms of speed and handling compared to other cars. I will be more than likely using and opel gt front axle and double a arm rear suspension. Thank you
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Nice to see that you are ambitious. I would question the weight though. You should aim for around 2000lbs and accept say 2100lb plus driver and with that the Scooby would provide around 250 - 340 bhp/ton. That would put you into supercar territory alongside Ferraris and Turbo Porsches. The gearing on a Scooby is good for about 140 mph so unless you put longer legs on it the acceleration will be quicker. Consider a Macpherson/Chapman strut rear suspension as it should be easier to accommodate and will be no less quick than double A arm.
I am unsure of the Opel GT front end but that does seem a bit down market when you've got such a specialist engine, drivetrain and rear suspension. It would be almost as economic to build in a proper double A arm front end. Also, consider the braking. The performance being in the supercar bracket will demand supercar brakes albeit less than the exoticars as they are heavier and will be faster (due to gearing). With the different front/rear weight bias and a relatively clean sheet of paper you could tailor the brakes very closely to the ideal and not be hampered by the Opel 30 year old design.
On the tyre front, don't over tyre it as you will have a a lightweight design that will need to make the tyres work. I would have thought that < 205 section for the front and < 225 rear would be ideal. Wheel diameters would be a function of the brake disc diameter more than anything but don't get lured into silly low profiles as the taller profile tyres are more tolerant of imperfect suspension design.
Be also aware that the power you are contemplating putting through the KG is much more than even Dr Ferry Porsche envisaged so that a fabricated structure might be necessary - certainly the existing floor pan won't be up to the task. The KG separate body does however, give you the possibility to fabricate a lower frame with all the components attached that the body just fixes to.
Anyway, those are my (rambling) thoughts but it does sound like an interesting project though.
evilC