I have read some through the forums for information. I see a post that an upgrade package from Mina gallery with exhaust and pulley gave something like 6 miles per gallon increase.

Is there anything else that would also increase mileage?
I have a 2002 XJR Base model

 

Of course I also want to increase power along the way too.

 

On my car the lower pulley upgrade (from Powerhouse) seems to have had a slightly negative effect on mileage. Probably because it's hard to resist the urge to use the added power. On highway cruising I see no difference at all.

 

I was thinking more along the lines of reducing vacuum and back pressure.

 

There are no known mods to these cars that will have a significant positive impact on mileage.

 

You want increased mileage AND increased power, what have you been smoking?

 

See below:

JustNiz
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2008 Jaguar XKR-Series


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Hey Marc I remember last Sunday at the Morning Coffee meet you said your MPG got significantly better with your new exhaust compared to stock... can you remind me what figures you're seeing?

#26
08-11-2010, 04:49 PM

MarcB
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2006 Jaguar XKR-Series


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I used to get an average of about 18 MPG now with all the modifications I am getting 24 MPG on a regular basis, and I drive it pretty hard.
__________________
2006 (MFG 4/05) XKR Victory Edition/4.2S Convertible - Quartz/Dove - Mina Gallery exhaust, custom "X" pipe, lowering springs, poly bushings, Hawk HPS brake pads, SC pulley, Nav to 3 Gauge conversion, remote top module, rear seat delete and stereo upgrade with factory head unit.

Previous Jaguars

1999 XK8 Convertible - Sapphire and Ivory
2001 XJR - Sapphire and Cashmere
2006 X-type Sportwagon (Estate) Winter Gold and Cashmere


Now Sean B, you can put that in your pipe and smoke it

 

What, no witty retort?

 

touche, but no mention of added power - the car could have an LPG conversion! lol

 

Place chunk of wood below accelerator pedal.
Whittle to go faster.

 

Hmmm, maybe this will help. It is a guideline I use.

A good way to think of Torque, on a dyno chart, is as how efficiently the engine is coverting fuel to tire rotation. Or, the acceleration you feel.

A good way to think of HP, on a dyno chart, is as how quickly the engine is converting the fuel to tire rotation. Or, how fast you can ultimately go.