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hello all

need some advice on best road to go down with a 4.6 with distributor { 3.9 serpentine front cover }

injection / ecu and best camshaft etc

is it recommended to fit 4.0 pistons to raise the compression ?

thanks 

mark 

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What are you trying to do with it?

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Has the engine already been converted to a distributor? If not, are you sure you want to go down that road? The distributor was always the biggest weak point. Even if you're putting it in something that doesn't have an ECU, it's worth considering EDIS controlled by MegaJolt (you don't need to go full MegaSquirt with fuelling control as well) or similar. Much more reliable, especially if it's going to get wet.

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4.0 pistons will raise the compression ratio depending on what you are starting off with - you need to change out the 4.0 gudgeon pins for the 4.6 gudgeon pins as the 4.6 pins have thicker walls.

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Posted (edited)

In terms of Camshaft, I used a Kent cam from Turner engineering and it has transformed my 4.2 

It produces so much more torque at usable rev/min that it has almost made the gearbox redundant and this is in a 110 CSW

 

Might be worth your while looking at these.

http://www.landroverresource.com/40_46_V8_overhaul.pdf

http://www.super7thheaven.co.uk/wp-content/uploads/2014/09/Rover-V8-3528cc-3946cc-4275cc-Overhaul-Manual.pdf

Edited by neil110

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