OV9

JLv3.0 wrote: Tue Mar 05, 2019 12:12 pm Didn't your Pug hit 200 mph in third?

You're getting confused. It hit £200 worth of damage in third.

Bugger

GG. wrote: Tue Mar 05, 2019 10:48 am Think that's still the case but not applicable to cars sold in the UK.

I remember you made (what I presume was) a sarcy comment about "well at least leaving the EU will solve this" when I posted the story from Evo about mandatory speed limiters but the Japanese example does actually show how the technology can be left off for territories where that law is not applicable. The one good thing about electronically based systems I guess is that it can be either programmed on or off with minimal effort.

The point I was making was not about the ability to disable the limiter in different territories - it was, fairly obviously, that if we were in the EU we'd be bound by it.

Since you drive a manual 911 which is geared to about 90mph in 2nd, what will you do with the three redundant gear ratios?

That's fine - so you were not in fact being sarcastic. The internet has clearly jaded me.

Anyway on gear ratios, this is the in gear flexibility chart for the PDK version (I couldn't easily see the 6MT) which is actually slightly longer geared.



99mph is redline in 3rd in mine so you'd need 4th for 112mph and a longer gear for low revs on the motorway so I think you'd in reality only get rid of 5th gear and 6 would stay as an older style >1:1 overdrive. Or of course, make each gear 1-5 good for about 25 mph, leave 6th as is and retain a six speed box.

Or just leave it all as it is and get on with life seeing as cars already have the gearing that suits them

Yep - that too!

Plus obviously we're not envisaging that all cars would be retrofitted with limiters (at least not yet) so it's not likely to apply to my car anyway.

It makes sense for electric cars though, and iirc Volvo will be the first mainstream manufacturer to go full electric on their entire line up. 1 gear, 112 mph top speed, will probably trounce all other cars from 0 to 112 plus you can’t really drive at a sustained high speed in an electric car anyway. I imagine all the safety assists and autonomous stuff will still be able to monitor the car at 112 too.

tim wrote: Tue Mar 05, 2019 11:50 am Who here, in reality (not posting on the internet reality) regularly drives at 3 figure speeds these days? I don't think I would really care if my car was limited to 112 mph so long as it was just a speed limiter and not a power limiter.

I do. It’s in a perfectly safe way and no kittens were killed while doing so.

Also any kind of control in that sense is surely the thin end of the wedge ?

What if they did the same with bikes ?

Dave!

V8Granite wrote: Tue Mar 05, 2019 4:49 pm

tim wrote: Tue Mar 05, 2019 11:50 am Who here, in reality (not posting on the internet reality) regularly drives at 3 figure speeds these days? I don't think I would really care if my car was limited to 112 mph so long as it was just a speed limiter and not a power limiter.

I do. It’s in a perfectly safe way

only when driving to a local butcher with your recycling to buy a new toaster that has replaceable parts?

Rich B wrote: Tue Mar 05, 2019 4:51 pm

V8Granite wrote: Tue Mar 05, 2019 4:49 pm

tim wrote: Tue Mar 05, 2019 11:50 am Who here, in reality (not posting on the internet reality) regularly drives at 3 figure speeds these days? I don't think I would really care if my car was limited to 112 mph so long as it was just a speed limiter and not a power limiter.

I do. It’s in a perfectly safe way

only when driving to a local butcher with your recycling to buy a new toaster that has replaceable parts?

We had the roof box on for all the hemp we make our clothes from.

Dave!

V8Granite wrote: Tue Mar 05, 2019 4:52 pm

Rich B wrote: Tue Mar 05, 2019 4:51 pm

V8Granite wrote: Tue Mar 05, 2019 4:49 pm

I do. It’s in a perfectly safe way

only when driving to a local butcher with your recycling to buy a new toaster that has replaceable parts?

We had the roof box on for all the hemp we make our clothes from.

Dave!

Naturally.

GG. wrote: Tue Mar 05, 2019 3:41 pm 99mph is redline in 3rd in mine so you'd need 4th for 112mph and a longer gear for low revs on the motorway so I think you'd in reality only get rid of 5th gear and 6 would stay as an older style >1:1 overdrive. Or of course, make each gear 1-5 good for about 25 mph, leave 6th as is and retain a six speed box.

Porsche have definitely got worse with the gearing since the 997 then (I remember my 986 2.7 feeling too high geared; you couldn't legally rev it out anywhere in the UK in 2nd).

The 981S manual has maximum speeds in gears just before the rev limiter:
1st - 46mph
2nd - 83mph
3rd - 118mph
4th - 150mph

We're not going to get lower gearing because that's driven by economy. Seems a shame not to be able to see the red line in 4 of the 6 gears, even on a track.

Are there any cars these days where the top speed is limited by the redline or are they all so highly geared that they succumb to wind resistance?

Funnily enough, Porsche do kind of know what they're doing. See below for VMAX in a 997. I'd say that is the exact point when the rev limiter is about to kick in. So they've worked out what final ratio would put the top speed determined by power and wind resistance 100 revs or so below the redline.

Sounds like a lot of screaming in that video...

Clearly the door seals weren't up to 190mph

Jobbo wrote: Tue Mar 05, 2019 5:42 pm

GG. wrote: Tue Mar 05, 2019 3:41 pm 99mph is redline in 3rd in mine so you'd need 4th for 112mph and a longer gear for low revs on the motorway so I think you'd in reality only get rid of 5th gear and 6 would stay as an older style >1:1 overdrive. Or of course, make each gear 1-5 good for about 25 mph, leave 6th as is and retain a six speed box.

I remember my 986 2.7 feeling too high geared; you couldn't legally rev it out anywhere in the UK in 2nd.

5 speed box though right? Guess they had to pull the ratios up to compensate given that it could still do 150mph ish.

My dad had an early 2.7 987 which I used to drive (and which had the 5spd box) and I can't remember it being that high geared but maybe I'm getting memory merge with the 3.2 S that I owned that had the 6spd box.

I think they should have made it 111mph cause, you know, my car goes up to 111

112’s an odd announcement to make isn’t it. Announce a new safety policy with a headline for, what, 6 or 7 markets???

179.2 Kph is an odd limit...

It’s 180km/h which rounds to 112 mph.

What’s so odd about that?

Nothing. Its even.