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Re dedicated to providing a 5 star. This ad is for an 18.6% performance upgrade lower supercharger drive pulley with special length drive belt for the 4.0 V8 model below. The pulley replaces the existing outer drive section of your crankshaft damper unit which will require modification to install.These pulleys are CNC machined from high grade billet aluminium. Produced to the highest dimensional tolerances and surface finish to that of any on the market. Changing the pulley ratio results in the supercharger working at a higher speed and producing more boost. Because this just directly increases airflow through the cars existing sensors, the ECU is kept aware of the increased flow and no further alterations or remapping are necessary. Vehicle: Jaguar XJ (XJ8 - X308) XJR 4 Ltr.
Years: 1998, 1999, 2000, 2001, 2002. 1 x Uprated Alloy Performance Crank Pulley 18.6% - 4 x Stainless Steel Torx Mounting Bolts - Special length Supercharger belt to suit - Installation/Modification Instructions.On 4.0 engines, the lower pulley mod yields much better results than the upper pulley. This modification gives an 18.6% supercharger driven speed increase, which equates to about a 3.5psi boost pressure rise. It will make the car feel as though the engine has grown by a litre. These upgrades have been fitted to many cars, result vary but discussion on forums and bar stools confirm about a 60bhp/ftlb gain from this modification. While this is true for the midrange gain the Eaton M112 supercharger loses efficiency at high rpm so actual peak power gain may realistically be about 10-15bhp. Irrespective of the increase tailing off towards redline where engines are least used, this modification gives a HUGE increase in instant grunt and acceleration which really does transform the car. IMPORTANT - if you already have a performance upper pulley, you will need to upgrade your intercooler and intercooler circuit water pump, as inlet air temperatures can rise too high with both pulleys upgraded and risk engine damage unless cooling is addressed. Before purchasing first check that you have the correct damper that can be modified. Some models of the 4.0 used a different damper that cannot be modified to use this pulley. Please refer to our images to find which is the correct version. To help, the pulleys we can modify have solid outer pulleys, the incorrect version can be identified by the presence of a rubber band between the pulley and the hub. In order to install this pulley you will need access to a lathe large enough to work on the damper.
We provide instructions with pictorial guides for this process. In brief it requires the existing pulley to be machined off and down to a hub size that the new pulley can sit on.
Then some drilling and tapping to secure the pulley in place and it's done. If you don't have access to or do not have the required lathe skills we also offer a few services to suite you.
No deposit is required for this. If you already have an upper performance pulley, the combination of the two will generate a lot of excess heat both affecting performance and reliability.We advise upgrading the intercooler and chargecooler electric pump to minimise the temperature increase. If you not have the machining equipment required or simply do not wish to undertake the task yourself Powerhouse also offer machining services and drive-in drive-out services. Powerhouse Automotive (UK) Ltd is based in Chesterfield, England. We supply the UK and world retail and trade markets with uprated supercharger pulleys for Jaguar and Range Rover cars. We also offer rebuild services for Eaton superchargers used on these vehicles, and stock a range of bearing kits for home repair.
Under our BrakemastersTM trading arm, we are UK and world leaders in motorcycle brake caliper rebuild services and seal kits. Specialising in motorcycle brakes for years, we have developed an unrivalled range of components and application knowledge. We are also official agents for Highpower Wizards of Nos nitrous oxide systems, with 25 years enthusiastic experience of nitrous injection.
Weekend orders (2pm Friday onwards) cannot be processed until Monday. Those dates are NOT guarantees, they are'best possible', and actual times can be much slower.UK Customers : UK 2nd class small packet post can take a week. We have no control over this, so please try to accept that we are not responsible for slow post. If you require tracking, please select the additional cost services at checkout. If we have sent an incorrect or faulty item, we will of course cover reasonable return post expense.
Please ensure that you have ordered for your correct model and year of vehicle. We recommend you have items fitted by a qualified professional mechanic, and cannot be held responsible for faults which result from incorrect fitting and assembly. The item "Jaguar XJR X308 4.0 V8 Supercharger 18% Lower Pulley Performance Upgrade 1998+" is in sale since Thursday, December 11, 2014. This item is in the category "eBay Motors\Parts & Accessories\Commercial Truck Parts\Engines & Components\Other Engines & Components". The seller is "powerhouse-uk" and is located in Chesterfield.
This item can be shipped worldwide.