Vehicle & Technical > Range Rover

New cam into 3.5V8

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Range Rover Blues:
The big difference between a 3.5 EFi and a 3.9 is the cam.  Some of it is down to the exhaust (which is way better on the EFi anyway) but mostly the cam.  If you don't notice any difference I'd be surprised.  Whether it's worth the cash.....

If yours is the SD1 engine, what about fitting EFi heads at the same time? 3.9 cam and decent manifolds, even if they come from a carbon steel 3.9 system they would be better than what I suspect is there already.

As for the LPG, you are loosing a few Hp running on LPG, I find an advance of around 5 degrees makes up for about half of what is lost with my timing on 5deg to begin with (9.35:1).  Those advance modules do seem fragile though, mine is always sulking, doesn't like the damp.

If you are fitting a performance cam think about a vernier pulley at the same time, a performance cam poorly timed in will be worse than a stock cam set within tolerance.

The trick to performance/economy tuning is engine breathing.

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