Macca

Well check this out. Comparative data from the definitive source back to back against other factory variants it has tested over the last 14 years.

Whats the surprise. The surprise is the factory 991 GT3 is lighter than most of the other factory equipped launch cars supplied to market over the last decade!

What isnt surprising? The 991 GT3 aced every benchmark....significantly (just look at braking - an AMS new record using the PCCD and also look at in gear acceleration!).

NB. tests are carried out two up with test gear (assume 100-110kg extra weight) and full tank of gas. the factory tests the performance with one (driver) etc.

Thanks to Boxster Coupe GTS on the Rennteam board....

mhh

You are a bit late.

https://rennlist.com/forums/991-gt3/...test-data.html

Macca

Ooops. Thanks for that. I like my headline better LOL!

mhh

If we keep posting in this thread, the other one will fade away.

thedoctor

Great test and data. Would've been awesome if they threw in the RS's aswell

kosmo

interesting that the weight distribution is about the same given the large (4in?) increase in wheelbase.

why is this? the RWS that heavy???

Petevb

In gear acceleration is interesting to look at when you remember the 991 is a 7 speed, so 6th gear ends at roughly the same speed as 5th in the earlier cars. By that measure it's less flexible than many of the previous cars, which would be as expected given the low RPM torque hole. Of course I'm not sure how much in-gear acceleration really matters any more with the PDK- much quicker to simply shift down a gear.

I'm not shocked about the weight. Porsche has been lying through there teeth the last few years about curb weights, about time they corrected that.

Nizer

More to do with PDK, wider rear body work, decorative engine bay cover.....

Petevb

By itself, no. See my theory in the other thread:
https://rennlist.com/forums/10715750-post16.html

wanna911

Seems to me that the increase in wheelbase somewhat negates the moving forward of the engine. increase in wheelbase means the axles mover further away from the COG. As long as the engine is prominently behind the rear axles this would have a reverse affect on the weight balance even though the engine is lighter. And the RWS is adding what like 60 lbs or something.

That's just a guess.

Petevb

Not a correct guess, unfortunately. While the math is straightforward, perhaps a simple thought experiment will help understand why increasing wheelbase helps the weight distribution:

First, understand that the engine hanging back behind the rear axle is actually lifting the front axle- it's like a seesaw, with the rear wheels being the fulcrum, and the ~500 lb motor sitting on one side. Now imagine you take the wheelbase (the other side of the seesaw) and make it shorter and shorter. The shorter the wheelbase the less force on the other side of the seesaw, until at some point there isn't enough weight to counterbalance the motor, and it lifts the front wheels clear off the ground.

Not sure it that makes sense, but increasing the wheelbase helps CG- did it in my car.

Total weight of RWS is only 33 lbs, nearly half of that's in the electrical system so not over the rear axle.

Dude-

Those numbers are unheard of. Incredible.......

Sorry, I thought I was still in the BMW forum.

Back to Porsche forum. Nice numbers. Kind of what I expected. would be nice if they tested with 1 person to see if Porsche claims are accurate or understated.

MaxLTV

Yes, in Porsche forums, "incredible" means "not credible enough for me to believe" :-)

mooty

why was this a surprise or upset?
we should expect cars to get better and better

Nizer