Thread: BRZ vs E46 M3
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Old 02-16-2012, 06:38 PM   #54
KeepGuessing
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Quote:
Originally Posted by 7thgear View Post
i'll buy the cayman comparison

lateral grip is primarily a function of width, cg, weight and roll center

if all else being equal (ie, tires), then if the FRS's center of gravity is indeed low, and its suspension design properly utilizes that, then i see no reason why an FRS would not corner just as, if not faster, than a cayman.

obviously the interior and feel are TOOTTALLYYY different, but thats why this is a poormans porsche

Well considering some of the information thus far has been "lies of omission/exclusion" i'd be hesitant to just feed off of what's been said about the car just yet..


for 1, the Cayman's Center of Gravity is measured with it's stock wheels/tires..
That's a 17" wheel and a 55mm sidewall tire in the front and a 17" wheel and a 50mm sidewall tire in the rear, along with however much rake the car has.....Let's not forget the car has 5" of ground clearance..

The FR-S however has multiple wheel tire size options..

The GT86 RC for example, comes with 16" wheels, the BRZ with 17" wheels and 45mm sidewalls, the toyota 20 spokes are 18" wheels with 40mm sidewalls.. So that "Lower than the Cayman's center of gravity" varies substantially before the car has even hit the car lots.

I know thusfar toyota has said it's weight will start at 26xxlbs...But now that line has been blurred with the inclusion of the Toyota GT86 RC, which is the "26xx lb" model they were talking about.

So if the car with the factual "lower than cayman center of gravity" is ALSO the RC, then chances are every car with larger selection of wheels and tires doesn't quite fit the same claims.

As for the "If all things are equal i don't see why it couldn't corner as fast" by all things equal do you mean PURELY in the tires? or do you mean going through substantial measures to get the same generalized specifications from both...

Because then we're talking optimal suspension tuning for both, because the porsche is setup for tire preservation and guel economy (being a Base Cayman and not an S) while the FR-S is not as noted by the stock cast/camber...Then you have to factor in that the FRS stock suspension setup IS a compromise for performance and economy, which is why the negative toe under hard cornering is prevalent unless addressed...etc etc..

but if we're talking JUST equal tires? no..
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