So I noticed that there is a switch? on the end of the throttle pedal. I assume this is a WOT switch, maybe for protecting the transmission? But when I stay out of this switch I get 10psi to hold strong. As soon as I get into this switch I go back to 8psi...which is what the stock pulley was.

Quite interested in this mod, anyone had it done at Powerhouse and happy with results, if anyone local to me id be interested in a comparison with my standard spec one???

i had a company somewhere doing the pulley and remap and exhaust for the 5-0 to get to 640bhp somewhere on my mac if i can still find it. _____________________________________________________
Zambezi silver Vogue Se unique

Scottyav, that would be good if you could. Mind you Sheffield isn't too far away for me if have go Powerhouse.

Thats why im looking at 5-0 b for the 600+ bhp but grey black trim under £70k are rare and thats only colour i want  _____________________________________________________
Zambezi silver Vogue Se unique

Pulleys http://www.powerhouse.uk/

remap 600+
https://viezu.com/

Scottyav wrote:

Custom Land Rover - Range Rover Tuning and ECU remapping and supercharger pulley upgrade package.

Power increases up to 640bhp available

viezu technologies

Evesham
Worcestershire
WR111GP
United Kingdom
Phone: 01869 324402
Email: info@viezu.com

 _____________________________________________________
Zambezi silver Vogue Se unique

Cheers Scottyav, will have a browse on their sites.

Just emailed Powerhouse, apparently they don't offer a fitting service for the RR
Looks as if it could be a buy the parts :- Modified snout with 10% pulley fitted and do it myself?

I haven't read through the repair manual to see if I can piece together how things are working and what that switch is for...but. Today I had a short drive and thought that maybe the DSC may have some interaction with that switch. So I turned it off and I don't seem to see the boost cut/limit at 8psi. Needs more testing but this is interesting

After some light reading:

"A detente mechanism is located at the forward end of the housing and is operated by a ball located on the drum. At near maximum throttle pedal movement, the ball contacts the detente mechanism. A spring in the mechanism is compressed and gives the driver the feeling of depressing a 'kickdown' switch when full pedal travel is achieved."

"The APP sensor has two potentiometer tracks which each receive a 5V input voltage from the ECM. Track 1 provides an output of 0.5V with the pedal at rest and 2.0V at 100% full throttle. Track 2 provides an output of 0.5V with the pedal at rest and 4.5V at 100% full throttle. The signals from the two tracks are used by the ECM to determine fueling for engine operation and also by the ECM and the TCM to initiate a kickdown request for the automatic transmission."

So it sounds like the WOT switch is the detente mechanism that is only there to give feeling to the driver. I understand the need for the pedal to feel as if it were an actual throttle cable...but to add the kick down switch feeling is strange to me. In any case, the kick down operation is obviously monitored and used. And I imagine is has some power limiting qualities as IIRC the 6HP26 trans is maxed out with torque/hp on the 4.2SC engine.

stucart wrote:

Just emailed Powerhouse, apparently they don't offer a fitting service for the RR
Looks as if it could be a buy the parts :- Modified snout with 10% pulley fitted and do it myself?