997 C2S gear ratios

[chappardababbar]

I read a lot of complaints about 987/981/991 gear ratios being too tall but I never read this about the 997 C2S

I went out for a drive in my C2S this weekend and honestly I felt they were spot on. Assume the ratios in the 997 are shorter than the aforementioned generation cars?

[The_Doc]

I'll be honest, at above 4000rpm I'm grinning far too widely to care about how long the ratio is. I watch the redline and enjoy the manual gear change into the next gear. 6th gear is great for motorway speed, and the fact it could take you on to 180mph is frankly amusing.

I've not owned at 996 or 991

[jakesmith]

I feel they have a great balance for UK road speeds, I don't find myself changing too much and feel involved with the drive

[Bungle007]

I think the ratios are the same from 997 to 991, albeit the wheels are larger on the 991, meaning taller overall gearing. 997 gearing feels good on the road.

[chappardababbar]

Bungle007 said:

I think the ratios are the same from 997 to 991, albeit the wheels are larger on the 991, meaning taller overall gearing. 997 gearing feels good on the road.

That's interesting

[hartech]

This response is not going to be much use because I am not good at detailing differences in individual model specifications - but the 987, 981 and 991 are not the same gearboxes.

I seem top remember that the Boxster S and 996 gearbox ratios are the same but the 997 Gen 1 is geared about 5% lower in top with less of a difference in lower gears (despite having the same final drive ratio and more power and torque).

I don't have the 991 ratios to hand (sorry too busy to look it up) but if someone wants to research it most handbooks contain the relevant information. If you post the internal and final drive ratios - the larger the ratio number the lower the gearing and you can divide one by the other to compare the % higher or lower the ratio is and then if you multiply that by the maximum revs this will indicate the differences perhaps in a more tangible way?

You have to be careful when making assumptions about the wheel sizes as a bigger wheel does not have a proportionally bigger outside diameter to the tyres - instead the outside diameter is usually almost the same and it is the tyre wall height that reduces as the wheel gets bigger.

However different tyre profiles do make a slight change in the rolling diameter but usually not enough to be felt in terms of acceleration.

Hopefully someone with more knowledge of the specifications will come along and define the differences better.


Baz

[STiG911]

The_Doc said:

I'll be honest, at above 4000rpm I'm grinning far too widely to care about how long the ratio is. I watch the redline and enjoy the manual gear change into the next gear. 6th gear is great for motorway speed, and the fact it could take you on to 180mph is frankly amusing.

+1

[Porsche911R]

chappardababbar said:

I read a lot of complaints about 987/981/991 gear ratios being too tall but I never read this about the 997 C2S

I went out for a drive in my C2S this weekend and honestly I felt they were spot on. Assume the ratios in the 997 are shorter than the aforementioned generation cars?

a 997.2 x50 car will outdrag a GT3 to 100mph just because of the shorter ratio's

[braddo]

Porsche911R said:

a 997.2 x50 car

Isn't that what a GTS is? Does a GTS's book time for 0-100 beat a GT3?

[Cheib]

One thing I love about my 997 GTS is how the gearing works so well at road speeds....second and third gear are perfect for keeping the engine on cam when enjoying country lanes.