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V8 Questions

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rokcrawlin:
you are better off replacing the heads and there is a difference between the efi and carb heads the valves are bigger on the efi ones for a start. and if you skim the heads whilst running a 3.9 cam you WILL get nicely bent pushrods as the skimming will push the rockers down harder onto the pushrods and the 3.9 camshaft having a longer duration will be attempting to push the whole lot into the pistons SO DONT skim the heads unless you want to have a bigger bill  PM me if you want some pictures of the results of a mate who did this

rokcrawlin:
As an add on sometimes burnt oil may be caused by blocked breathers caused by water or condensation in the oil this in turn causes the crankcase to force oil into the combustion chamber and it will exit via the exhaust

muddysteve:
3.9 cam? i've not got one of these, i was planning on sticking with my existing cam shaft but just puttin gthe efi heads on my engine

i was thinking of fitting one of those fancy cams you see on ebay quite often but common sense got the better of me

Steve

rokcrawlin:

--- Quote from: "muddysteve" ---3.9 cam? i've not got one of these, i was planning on sticking with my existing cam shaft but just puttin gthe efi heads on my engine

i was thinking of fitting one of those fancy cams you see on ebay quite often but common sense got the better of me

Steve
--- End quote ---

the cams on ebay may give the same effect as a 3.9 one as all they do is alter the opening duration of the valves to help the motor breath and exhaust mor efficiently

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