Stage 2 mrc with gearbox map
Re: Stage 2 mrc with gearbox map
The Gearbox speed sensor runs out of input resolution at 217mph so the display can't show greater than that but the needle should still be able to move.
As calculated, a 7k rpm limit in 6th gear on stock tyres etc would make for a 250mph top speed limit, should you have the power, distance to ever do this -
As calculated, a 7k rpm limit in 6th gear on stock tyres etc would make for a 250mph top speed limit, should you have the power, distance to ever do this -
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Re: Stage 2 mrc with gearbox map
Pretty incredible really not many cars can do that!
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Re: Stage 2 mrc with gearbox map
Hi IanIanH755 wrote: ↑Sat May 25, 2019 1:56 pmThe Gearbox speed sensor runs out of input resolution at 217mph so the display can't show greater than that but the needle should still be able to move.
As calculated, a 7k rpm limit in 6th gear on stock tyres etc would make for a 250mph top speed limit, should you have the power, distance to ever do this -
I'm sure I've seen vids of the display 370kmh+, well over 217mph
Ferrari 488 Spider
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah
Re: Stage 2 mrc with gearbox map
Wow... silly to ask, are they really capable of that speed (with the right setup in place)?IanH755 wrote: ↑Sat May 25, 2019 1:56 pmThe Gearbox speed sensor runs out of input resolution at 217mph so the display can't show greater than that but the needle should still be able to move.
As calculated, a 7k rpm limit in 6th gear on stock tyres etc would make for a 250mph top speed limit, should you have the power, distance to ever do this -
2008 RS6 Avant (Monza Silver)
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs
Re: Stage 2 mrc with gearbox map
Long enough road maybe it will, they get to 200 pretty easyc3nturi0n wrote:Wow... silly to ask, are they really capable of that speed (with the right setup in place)?IanH755 wrote: ↑Sat May 25, 2019 1:56 pmThe Gearbox speed sensor runs out of input resolution at 217mph so the display can't show greater than that but the needle should still be able to move.
As calculated, a 7k rpm limit in 6th gear on stock tyres etc would make for a 250mph top speed limit, should you have the power, distance to ever do this -
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- 4th Gear
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Re: Stage 2 mrc with gearbox map
Maybe a very powerful engine might have the power, but you'd have to wonder if the wheels bearings and differentials would overheat first?
Nick
Nick
Re: Stage 2 mrc with gearbox map
I’d not fancy it on the tyres either. It’s a heavy old Bertha, stock tyres are going to degrade rapidly at that speed.
Re: Stage 2 mrc with gearbox map
People have done it !
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Re: Stage 2 mrc with gearbox map
More fool them! There’s a reason Veyron and Chiron have bespoke rubber.
Re: Stage 2 mrc with gearbox map
True, not many people worry about things like that, worrying really.doodlebug wrote:More fool them! There’s a reason Veyron and Chiron have bespoke rubber.
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Re: Stage 2 mrc with gearbox map
biggest threat to the tyre is heat.
speed rating is for a constant speed for 2 hours.
I'm sure there will be a safety margin in there too.
So a short run at 200-210mph I can't imagine to be too risky if you've checked tyres prior. Obviously if 1 did fail I'd imagine you'd be in a world of hurt....
speed rating is for a constant speed for 2 hours.
I'm sure there will be a safety margin in there too.
So a short run at 200-210mph I can't imagine to be too risky if you've checked tyres prior. Obviously if 1 did fail I'd imagine you'd be in a world of hurt....
Ferrari 488 Spider
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah
Re: Stage 2 mrc with gearbox map
Yup... been there done that .Ads50 wrote: ↑Sun May 26, 2019 10:32 amLong enough road maybe it will, they get to 200 pretty easyc3nturi0n wrote:Wow... silly to ask, are they really capable of that speed (with the right setup in place)?IanH755 wrote: ↑Sat May 25, 2019 1:56 pmThe Gearbox speed sensor runs out of input resolution at 217mph so the display can't show greater than that but the needle should still be able to move.
As calculated, a 7k rpm limit in 6th gear on stock tyres etc would make for a 250mph top speed limit, should you have the power, distance to ever do this -
Sent from my iPhone using Tapatalk
2008 RS6 Avant (Monza Silver)
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs
Re: Stage 2 mrc with gearbox map
There's a big difference between 200 on the speedo and true 200
Ferrari 488 Spider
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah
C6 RS6
E46 M3 convertible
Nissan 200sx mk 2
Vauxhall Senator
Ford Sierra 1.8LX
Peugeot 205 1.9 GTi
Vauxhall Belmont SRi
Vauxhall Astra 1.3
Vauxhall Astra 1.3
1st car Datsun 120 FII Lime green....yeah
Re: Stage 2 mrc with gearbox map
...especially when you have to break hard !
2008 RS6 Avant (Monza Silver)
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs
- Stage II MRC tune with gearbox (720PS/850Nm)
- MIJ Powerflow exhaust (non-res)
- H&R ARBs
-
- 4th Gear
- Posts: 565
- Joined: Fri May 25, 2018 4:53 pm
Re: Stage 2 mrc with gearbox map
When you do the sums, the centrifugal forces that the tyres have to withstand make you stop and think. I did the calcs once ( I used to go around weighing tyres for this reason) and I can't remember the numbers, but I do remember they were remarkably large. The tyres simply have to be very strong.
Nick
Nick
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