XJ XJ8 / XJR ( X308 ) 1997 - 2003

1998 XJR Boost Gauge/Firewall

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Old 08-17-2024, 01:38 PM
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Default 1998 XJR Boost Gauge/Firewall

Hello, so I’ve decided to install a boost gauge and the line I’m thinking of tapping into is the one next to the V8 cover in the back passenger side(if there are better let me know). The only trouble I’m having is finding where to get all the wires and the vacuum hose through the firewall without pinching the line.

If you guys have any recommendations would I love to hear them.
 
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Old 08-17-2024, 02:06 PM
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Tap the line from blower hat to fuel pressure regulator.

Run line to scuttle by brake booster. Ther is a big grommet there.

Easy
 
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Old 08-17-2024, 02:43 PM
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Quad, if you have a boost gauge, do you have any mods or is it stock? Either way, what kind of boost are you pushing?
 
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Old 08-17-2024, 07:18 PM
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Originally Posted by Addicted2boost
Quad, if you have a boost gauge, do you have any mods or is it stock? Either way, what kind of boost are you pushing?
Nothing crazy
Gen v Eaton
1.5 upper
4.2 lower pulley
3.5 intake
Roughly 15psi depending on atmospheric conditions
 
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Old 08-20-2024, 01:38 AM
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Originally Posted by Quadcammer
Nothing crazy
Gen v Eaton
1.5 upper
4.2 lower pulley
3.5 intake
Roughly 15psi depending on atmospheric conditions
Did you need to do anything to cooling system?
 
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