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Originally Posted by whynotmoo
would the Sprinter/Liberty turbo that you guys are using still be the best bet considering I'll be hauling a 4600lb Rover around...
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Sure. Its still the same boost pressure but the turbo will spool far quicker and work more efficiently.
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I did notice somewhere on this or another forum a mention of higher rate valve springs, which I'm very familiar with from gas engine applications, but it does tend to cause a little more cam wear. How easy it is to find replacement cams for these or will I have to get one custom ground/hardened if the springs to take their toll on the original cam (it's already got 281k miles on it).
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You won't really need that unless you're planning on pushing 25psi+ of boost. MB will be happy to $ell you a new cam. If you bring an original cam to a performance/machine shop, I'd bet they could make a billet cam to fit your needs.