Performance Upgrades.
#1
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I own a 1998 XJR X308 4.0 V8 Supercharged. Recently repurchased it after owner blew head gasket. Have motor torn down and heads ready to be milled. I would enjoy hearing from anyone who has experienced this. I would like to upgrade fuel injectors,coils, plugs and am looking for a suggestion there as well as any performance upgrades anyone has successful experience with. Any tips or sugestions would be appreciated
#2
Join Date: Feb 2013
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Plenty of threads such as this one... https://www.jaguarforums.com/forum/x...pe-more-75812/ ...do searches, with ported supercharger, 92mm MAF, ported heads, rebuilt heads.
Right off, the best way to upgrade the fuel injectors is to send them off for cleaning. There is a company in Houston, TX that does it and again, a search will bring that up. The specced iridium plugs are the best you can get for this app. I'm sure some more folks will provide more info.
Right off, the best way to upgrade the fuel injectors is to send them off for cleaning. There is a company in Houston, TX that does it and again, a search will bring that up. The specced iridium plugs are the best you can get for this app. I'm sure some more folks will provide more info.
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