life expectancy of big bhp cvh zvh cossie
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life expectancy of big bhp cvh zvh cossie
1 for the tuners really if say you had a 300 bhp zvh optimumly fuelld and set up how long would you expect that engine to last not takeing into account failures more on engine wear such as rings crank ect ,then same for say 500 bhp cossie engine would it be say 2 yrs or x miles just summat i wonderd when i had my last and something id like to know for when the next is built 
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peace to da middle east
Norris Motorsport
Joined: May 2003
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From: Derbyshire
Generally speaking, I advise any engine running 200+bhp/litre to be freshened up at 10,000miles, but this is of course dependant on usage, and just how fussy you are with regard to engine condition.
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Norris Motorsport
Joined: May 2003
Posts: 3,437
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From: Derbyshire
Paul, its totally down to wear rates as to what needs replacing and this is down to type of usage. When I quote 10K miles thats assuming the car is for weekend use and trackdays only, so that most of the 10K is relatively hard miles.
At a freshen up the main areas to check for wear are bores/rings, shells, oil pump, cams/followers and valve guides. All other parts tend to be reused except for the new gaskets of course.
If the bore wear is good, then it will consist mainly of a rehone and new rings, new shells, check oil pump, new valve guides and seats recut and then rebuilt.
Hence you can see the big cost at a freshen up comes from whether the bore has worn. In this case its a rebore and new pistons which adds significant cost. Most however are ok at 10K and usually require a bore at the next 10K freshen. (i.e. 20K miles total)
At a freshen up the main areas to check for wear are bores/rings, shells, oil pump, cams/followers and valve guides. All other parts tend to be reused except for the new gaskets of course.
If the bore wear is good, then it will consist mainly of a rehone and new rings, new shells, check oil pump, new valve guides and seats recut and then rebuilt.
Hence you can see the big cost at a freshen up comes from whether the bore has worn. In this case its a rebore and new pistons which adds significant cost. Most however are ok at 10K and usually require a bore at the next 10K freshen. (i.e. 20K miles total)
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hI
My old 500bhp conversion did 23k before it needed a re-build.
It still ran well & recorded 0-100 8.1 & 181.8mph on its last event, however I knew by this stage it was past its best , one week later it was inspected & found to have a worn Turbo & a badly worn inlet cam.
Rod
My old 500bhp conversion did 23k before it needed a re-build.
It still ran well & recorded 0-100 8.1 & 181.8mph on its last event, however I knew by this stage it was past its best , one week later it was inspected & found to have a worn Turbo & a badly worn inlet cam.
Rod
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