Valve seat pressure & Cam. Options/ alternatives?
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Senior Member
Joined: Sep 2010
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From: Seattle, Washington
Valve seat pressure & Cam. Options/ alternatives?
Wondering what the intake & exhaust seating pressure is.
This is a S.III 4.2L
Also, wondering if there are any other OEM cams that may be able to unterchange & give a little more lift & duration.
This is a S.III 4.2L
Also, wondering if there are any other OEM cams that may be able to unterchange & give a little more lift & duration.
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Joined: Apr 2012
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From: New York City
here ya go...
178-E Camshaft - 3.8 - 4.2 Six Cyl - Kelford Cams
1300$ Cam and springs.
Also try webcamsafts. They can grind up just about any cam...for a price.
Read this from page 63....
How to Power Tune Jaguar XK 3.4, 3.8 & 4.2 Litre Engines - Des Hammill - Google Books
Spring pressure is on the bottom of page 67
1300$ Cam and springs.
Also try webcamsafts. They can grind up just about any cam...for a price.
Read this from page 63....
How to Power Tune Jaguar XK 3.4, 3.8 & 4.2 Litre Engines - Des Hammill - Google Books
Spring pressure is on the bottom of page 67
Last edited by icsamerica; Jan 30, 2014 at 09:22 AM.
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Senior Member
Joined: Sep 2010
Posts: 221
Likes: 27
From: Seattle, Washington
Thanks buddy!
The factory Cams aren't going to be that great for boost.
Those valves are designed for a NA build & for t offer enough seating pressure, so we're gonna have to shim the OEM valves, or see if there are any other conparible springs from another engine that we can retrofit.
Those valves are designed for a NA build & for t offer enough seating pressure, so we're gonna have to shim the OEM valves, or see if there are any other conparible springs from another engine that we can retrofit.
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