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ciaa

Member Since: 31 Mar 2009
Location: Dubai
Posts: 70

2006 Range Rover Sport Supercharged Java Black

Sounds interesting .. who does the kit ?? 2006 RRS Supercharged
Hawke Saker 22" rims Nitto Tires
Larini exhaust System
ECU remap
Modified and ported supercharger with 3lb pulley

Tue Jan 11 2011 8:59pm

avos

Member Since: 26 Aug 2008
Location: Belgium
Posts: 106

If you are interested you can contact me via PM RRS SDV6 HEV Dynamic
XKR 700 BHP with Twin-screw and LSD

Wed Jan 12 2011 6:25am

Conrod

Member Since: 18 Jan 2011
Location: Sheffield
Posts: 7

paulmc wrote:
I also have that graphs from the m112, handy to have.

Your calcs looks pretty good. Only + 16bhp at the top end is a rubbish gain but i bet you aint are off

i intend porting my charger as well as intercooler mods so maybe get a bit more flow and slightly lower temps. i will de-cat it as well. I used to run a Audi s4 v6 twin turbo and when i deleted the cats i could run 2 degrees more ignition advance with no det. remvoing cats deffo increase flow especially on charged engines.

Avos is spot-on with what he says about high speed efficiency of the Eaton not making most of the pulley upgrades at top end, but across most of the rev range the difference really is a full 10% - and it feels like a huge difference. Whether upper or lower pulley conversion, in terms of £ per bhp it's pretty much unbeatable, very simple and achievable DIY at home. On the eighth day, the Lord said 'Let there be power', and he gave unto man nitrous oxide.

Tue Jan 18 2011 8:54pm

paulmc

Member Since: 07 Sep 2010
Location: Aberdeenshire
Posts: 25

The 2.6 Large Bore twin screw supercharger only 2000$ to buy, but then you need all the fab work to get it to fit. If you have access to a good fab shop you could always take your time and hide the cost from the wife Cayenne Turbo "S" 521bhp Standard

www.bmw535d.co.uk

Tue Jan 18 2011 9:28pm

Buster007

Member Since: 02 Dec 2010
Location: Essex
Posts: 649

2012 Range Rover Sport SDV6 HSE Santorini Black

Conrod wrote:
paulmc wrote:
I also have that graphs from the m112, handy to have.

Your calcs looks pretty good. Only + 16bhp at the top end is a rubbish gain but i bet you aint are off

i intend porting my charger as well as intercooler mods so maybe get a bit more flow and slightly lower temps. i will de-cat it as well. I used to run a Audi s4 v6 twin turbo and when i deleted the cats i could run 2 degrees more ignition advance with no det. remvoing cats deffo increase flow especially on charged engines.
Avos is spot-on with what he says about high speed efficiency of the Eaton not making most of the pulley upgrades at top end, but across most of the rev range the difference really is a full 10% - and it feels like a huge difference. Whether upper or lower pulley conversion, in terms of £ per bhp it's pretty much unbeatable, very simple and achievable DIY at home.

Which is the best pully to change top, bottom or both? Also where can I buy them & do I need a new longer/shorter belt?? Cheers Laurence.

Tue Jan 18 2011 10:11pm

paulmc

Member Since: 07 Sep 2010
Location: Aberdeenshire
Posts: 25

Search ebay there are pulleys on there. Top one needs to be cut off or a special puller is needed. I have not looked how difficult the bottom pulley is to change. Changing the top pulley does increase the chance of the belt slipping as it is smaller so less surface area / friction to allow the belt to grip.

No need for a new belt but it will aid grip if you buy one. Cayenne Turbo "S" 521bhp Standard

www.bmw535d.co.uk

Tue Jan 18 2011 11:22pm

Conrod

Member Since: 18 Jan 2011
Location: Sheffield
Posts: 7

paulmc wrote:
Search ebay there are pulleys on there. Top one needs to be cut off or a special puller is needed. I have not looked how difficult the bottom pulley is to change. Changing the top pulley does increase the chance of the belt slipping as it is smaller so less surface area / friction to allow the belt to grip.

No need for a new belt but it will aid grip if you buy one.

As paulmc says, top pulley needs to be cut/ground off or removed with a puller, and the replacement is fitted by heating it up with a good blow lamp, or acetylene gear, so it can be slid onto the shaft. The 1.5psi top pulley needs no further work, while the 2.5 psi pulley needs a small amount of aluminium to be removed from the supercharger snout with a rotary file or similar. It's still a DIY job and the kits come with a template to do this.

Slippage has in the past been a factor for upper pulleys because you're reducing the pulley diameter and available surface. However, the 'bad rep' is due to some people making them from aluminium, which does tend to slip when hot. The better pulleys, made of a reasonable quality general machining steel like EN32, don't slip. We go a step further and make them in stainless steel, which doesn’t give slip problems but for peace of mind offer Goodyear Gatorback pulley belts as an option – they give increased grip (as well as less noise and longer life) for less than the price of a Jaguar or Range Rover supplied belt so there is no issue. On the eighth day, the Lord said 'Let there be power', and he gave unto man nitrous oxide.

Wed Jan 19 2011 8:40am

carlos50

Member Since: 04 Oct 2010
Location: North East
Posts: 396

2005 Range Rover Sport Supercharged Java Black

Conrod

How much do you charge for the kit (supply only and inc fitting) and what guarantee / warranty would be supplied with your kit?

Wed Jan 19 2011 8:52am

Conrod

Member Since: 18 Jan 2011
Location: Sheffield
Posts: 7

Buster007 wrote:
Conrod wrote:
paulmc wrote:
I also have that graphs from the m112, handy to have.

Your calcs looks pretty good. Only + 16bhp at the top end is a rubbish gain but i bet you aint are off

i intend porting my charger as well as intercooler mods so maybe get a bit more flow and slightly lower temps. i will de-cat it as well. I used to run a Audi s4 v6 twin turbo and when i deleted the cats i could run 2 degrees more ignition advance with no det. remvoing cats deffo increase flow especially on charged engines.
Avos is spot-on with what he says about high speed efficiency of the Eaton not making most of the pulley upgrades at top end, but across most of the rev range the difference really is a full 10% - and it feels like a huge difference. Whether upper or lower pulley conversion, in terms of £ per bhp it's pretty much unbeatable, very simple and achievable DIY at home.

Which is the best pully to change top, bottom or both? Also where can I buy them & do I need a new longer/shorter belt??

It's generally viewed that the lower pulley is the better option for the 4.0 engines, and the upper pulley for the 4.2, as the 4.2 already has a 5% bigger lower pulley than a 4.0 (so will only gain 5% from a bottom pulley change). Lower pulley kits come with a longer belt, uppers can use the existing belt.

Doing both is certainly an option, and many have done it. It will double the midrange gain, but the peak power gain will be no more than with one pulley (because we'll already have maxed the Eaton at 5500rpm plus). That said, on a car weighing as much as Sport, it’s midrange we need not top end and with both pulleys done it will feel like the car’s gained a litre or two of engine. BUT, heat buildup in the intercooler circuit will become an issue with both pulleys changed. That’s curable with a bigger pre-rad and coolant pump, but is further expense required when doing both pulleys.

There are pulleys available on eBay or through a number of Jaguar specialists, or pm me and I’ll give you a list of what we provide at Club/Forum prices. On the eighth day, the Lord said 'Let there be power', and he gave unto man nitrous oxide.

Wed Jan 19 2011 8:53am

ciaa

Member Since: 31 Mar 2009
Location: Dubai
Posts: 70

avos wrote:
Hi Paul,

You might also have a good look at the intercooler piping, you will notice that there are just very small openings for the return flow from the intercoolers. Then on some vehicles the +/- cables are swapped for the intercooler pump, so they are operating already at a reduced volume because of this.

Here is a link for the bosch pump (bosch partno: 0392022002) that flows about 10% more than the stock one (their pretty cheap):
http://www.siliconeintakes.com/product_info.php?products_id=1001

Can't do that much more about the heat though, its inherent of the (h)eaton design, its just not build for high pressures, only way would be (besides swapping the heaton via alky kits or so.

Would be interesting to see before and after dynos.

Hi,

Has anyone fitted an uprated supercharger coolant pump?, as far as i can make out this Bosch pump is what is fitted as standard by LR ( its basically the bosch pump inside a Land Rover box

)

Cheers 2006 RRS Supercharged
Hawke Saker 22" rims Nitto Tires
Larini exhaust System
ECU remap
Modified and ported supercharger with 3lb pulley

Sun Feb 27 2011 5:44pm

avos

Member Since: 26 Aug 2008
Location: Belgium
Posts: 106

You could be right, I may have mistaken the hella pump that is used in the jaguars, and there you have the flow difference as mentioned. It probably is still labeled Bosch right?

I placed a much larger pump (in size and flow) in the RRS SC (with twin-screw) , but without modifying the piping as mentioned, it will not make a big difference.

In addition you could add somewhere a 2 gallon tank, that will give you some good buffer, and then it will take longer before you start losing power due to the heat buildup with the (h)eaton. RRS SDV6 HEV Dynamic
XKR 700 BHP with Twin-screw and LSD

Mon Feb 28 2011 7:04am

ciaa

Member Since: 31 Mar 2009
Location: Dubai
Posts: 70

Ahh ok thanks avos, yes it seems to be the same Bosch pump.

It seems though that it uses the same cooling circuit as the engine as the pump is connected directly to the radiator, theres no separate precool radiator for the supercharger like on the Jaguars.

I wonder if by fitting a separate radiator (maybe infront of the main rad) with header tank, this would bring the temperature down further?

Cheers 2006 RRS Supercharged
Hawke Saker 22" rims Nitto Tires
Larini exhaust System
ECU remap
Modified and ported supercharger with 3lb pulley

Mon Feb 28 2011 7:18pm

avos

Member Since: 26 Aug 2008
Location: Belgium
Posts: 106

The intercooler circuit is seperated from the main cooling system and also has its own radiator. However it is connected to the main cooling system thought thre is no coolant flow beteen the system. The connection there is used so there is some airbleeding via the standard cooling system and you also profit from the extra pressue, so good system imho. RRS SDV6 HEV Dynamic
XKR 700 BHP with Twin-screw and LSD

Tue Mar 01 2011 7:10am

ciaa

Member Since: 31 Mar 2009
Location: Dubai
Posts: 70

Ahh ok, thanks for clearing that up Avos 2006 RRS Supercharged
Hawke Saker 22" rims Nitto Tires
Larini exhaust System
ECU remap
Modified and ported supercharger with 3lb pulley

Tue Mar 01 2011 7:28am

ciaa

Member Since: 31 Mar 2009
Location: Dubai
Posts: 70

avos,

do you know anyone who manufactures larger or higher efficiency supercharger radiators?, ive done a search on the web and the RRS never seems to be listed

Cheers 2006 RRS Supercharged
Hawke Saker 22" rims Nitto Tires
Larini exhaust System
ECU remap
Modified and ported supercharger with 3lb pulley

Tue Mar 01 2011 9:02am

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