RRSPORT.CO.UK |
||
Forum Gallery Shop Sponsors |
Home · FAQ · New Posts · My Posts · PMs · Search · Members · Members Map · Calendar · Profile · Donate · Register · Log In |
Home > My Range Rover Sport > Pulley pickle |
|
|
geoffsnook Member Since: 19 Nov 2016 Location: cardiff Posts: 1699 |
i do believe the cooling of the supercharger can be an issue as it's not far from the top of the operating temperature in standard form |
||
Thu Mar 29 2018 5:14pm |
|
tinybum Member Since: 10 Dec 2015 Location: essex Posts: 44 |
Thanks i know there are uprated items so i will look for these thanks for your help |
||
Thu Mar 29 2018 5:24pm |
|
Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4958 |
Out of curiosity what is a larger diameter crankshaft pulley supposed to achieve ?.
|
||
Thu Mar 29 2018 8:14pm |
|
geoffsnook Member Since: 19 Nov 2016 Location: cardiff Posts: 1699 |
More power something to do with belt speed I believe but yet again stand to be corrected |
||
Thu Mar 29 2018 8:19pm |
|
Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4958 |
Is that not the object of changing the S/C pulley to a smaller one so it spins up faster ?.
|
||
Thu Mar 29 2018 8:22pm |
|
tinybum Member Since: 10 Dec 2015 Location: essex Posts: 44 |
Yes change the pulley so the supercharger spins up quicker the same with the bottom one the issue is with the 2 pulley changes and a good remap you are looking at a reported power increase of
|
||
Fri Mar 30 2018 3:07am |
|
Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4958 |
I think I would be more concerned about running out of transmission rather than fuel, as the 6HP28 Second Generation transmission fitted to the RRS1 S/C is rated at max. 700Nm of torque, I would imagine there is some built in tolerance on that.
|
||
Fri Mar 30 2018 4:44am |
|
geoffsnook Member Since: 19 Nov 2016 Location: cardiff Posts: 1699 |
i agree with col dont think the box would take that much and i do think you would have cooling issues as well |
||
Fri Mar 30 2018 7:26am |
|
Tim in Scotland Member Since: 30 May 2005 Location: Driving along in my automobile Posts: 17476 |
3.0ltr SDv6 has 700nm of torque out of the dealership so there must be some tolerance built in otherwise there would be a lot more gearbox failures than we read about. 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
|
||
Fri Mar 30 2018 8:14am |
|
Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4958 |
But doesn't the SDV6 have the 8 speed 8HP70 Transmission ? hence rated at 700Nm. and SVR's possibly have the 8HP90 which is rated at 900Nm. but that is only a guess I imagine some the guy's that own SVR's would know which transmission they have. It would also appear the HP28 is rated at 650Nm. not 700 as I thought.
|
||
Fri Mar 30 2018 11:05am |
|
Lindab Member Since: 20 Nov 2017 Location: Dundee Posts: 890 |
At the design stage all components have a Factor of Safety. The gearbox at a rough guess would have a FoS of 1.5 at least, probably 2. That means if it is rated at 700Nm it would take at least 1050Nm. For the majority of time you will never be near this unless your going racing |
||
Fri Mar 30 2018 12:03pm |
|
tinybum Member Since: 10 Dec 2015 Location: essex Posts: 44 |
Hi guys
|
||
Fri Mar 30 2018 3:50pm |
|
Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4958 |
To be fair I did have mine done 2/3 years ago and have not destroyed the transmission yet, and according to the Dyno readout after having it done it is throwing out 750Nm of torque well 749 to be exact. Not sure of the exact technical reason, but apparently due to the engine/transmission ecu's and how they communicate it is not possible to get a true bhp reading, however based on the graph reading they did get in their experience they would estimate it somewhere between 560 & 580bhp. As I said the bhp is only a guess/estimate which I think is the case in all these so called "gains" as with the exception of a few cases never seem to see the actual computer generated dyno readout's after they have been done in which case they could pick any figures out of the air.
|
||
Fri Mar 30 2018 9:40pm |
|
tinybum Member Since: 10 Dec 2015 Location: essex Posts: 44 |
Yeah can't agree with you more I am simply looking for that little bit more power and think this is the safest route can't wait to feel the difference |
||
Sat Mar 31 2018 3:52am |
|
|
All times are GMT |
< Previous Topic | Next Topic > |
Posting Rules
|
Site Copyright © 2005-2024 Futuranet Ltd & Martin Lewis