What was the weight differential V8 -Vs- V12?

--Adding weight to the front end will increase understeer and bugger up the front spring rate/body roll "comfort zone", resulting in the slightly disconcerting handling you describe.

We went through this with our 2.3-16 when we increased the front end weight with a supercharger/water/air intercooler system. There were other factors involved but the ultimate solution was heavier front & rear ARB's that brought the car back into balance.

Here is a link to a write-up we did on the effects of ARB changes on the car as it went through various iterations leading to the final blown configuration. It may give you some ideas.




Regards,
bobf

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2.3-16:ROTREXsupercharger;water/air intercooler;Megasquirt EFI/EDIS/COP;2.5-16cams&exh manifold;3"exh;YellowSpeedRacing adjustable suspension kit all round;28mm ARB front,22mm rear;C32 brakesfront,AmgCl55alloyrear;500e servo/mstr cyl;RDMTEKstrut towers;Speedtek camberarms rear;nylonsubframe bushes;Poly-u bushes front&rear,SPEC lightened pressure plate;manual locking 3.07ASD diff;short shift gear change;215 front,235X40X17 rear,EVO8.25 rims