Sleeving a twincam block
Posted: February 16th, 2013, 9:01 am
Having recently moved from Australia to Cyprus, I came across a machine shop so i decided to go in for a tour of the facilities. They had all the usual boring tools, lathe, grinding machines, a couple of mills etc. What caught my eye was a Fiat twincam block that had been resleeved. I found it interesting given in Australia we usually rebore and fit oversized pistons. The shop owner told me its common practice in Cyprus to fit sleeves and re-use pistons.
He showed me the liner they use. It was 87mm OD and 83mm ID. Obviously its then honed out to 84mm or so.
He also said a complete twin cam block can be done for less than €200, including boring & machining of the step & decking of the block followed by a chamber to aid ring insertion.
What are peoples thoughts on doing this to a competition T.C. ? Is there enough meat in the block for it not to pose any issues? Sounds like a good option if you want to save a set of expensive forged piston when the block wears.
He showed me the liner they use. It was 87mm OD and 83mm ID. Obviously its then honed out to 84mm or so.
He also said a complete twin cam block can be done for less than €200, including boring & machining of the step & decking of the block followed by a chamber to aid ring insertion.
What are peoples thoughts on doing this to a competition T.C. ? Is there enough meat in the block for it not to pose any issues? Sounds like a good option if you want to save a set of expensive forged piston when the block wears.