Vehicle & Technical > Range Rover
Changing pistons
clbarclay:
I'm looking at getting a another 3.5 engnie and either rebuilding it to go in mine or replacing mine and rebuilding the orgional latter.
As far as I can tell the only significant differance between an 9.35 and 8.13 compression ratio block is the pistons. Does this mean if I buy an 8.13 block I can just fit new pistons to get 9.35 compression again?
Secondly, if I do change the pistons could I fit and run 9.75 compression vitesse pistons withough too much difficulty or would I need items like a Vitesse ECU?
Range Rover Blues:
I don't think the EFi is clver enough to worry about the CR too much, it's the dizzy you will need to match whatever pistons you fit.
As for a higher CR, might be cheaper to find a high CR short engine in good nich and fit that, perhaps with a new cam (3.9) and followers/rockers and crank shells if you feel that way inclined.
clbarclay:
I don't feel very inclined at all (the wallets evan less inclided at the moment). I'm just mulling over ideas having seen a complete 3.5 v8 rebuild kit for sale that included new 9.75:1 pistons.
Range Rover Blues:
Depends what it costs. Would you fit new pistons without any machining on the bores though :?
clbarclay:
Fear not, have already bear that in mind along with skimming heads.
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