Next fortnight will be a big one for the project depending on state of current engine and will have a knock-on effect to how much modding i can do over next 6-12 months and hwo much track time I can get in.
Garry Kemp wrote:
"Oil analysis can give you some insights; you have to send a sample away to a
lab to test for trace elements / contaminants. It will tell you if there is
fuel contamination from overfueling; if the bearings are worn there is often
lead / copper in the oil, if the bores are wearing you will find nickel /
silicone carbide from the bores, if the crank / cams are wearing you'll find
iron. However I suspect your engine has issues of a different kind - we know
it has been running lean so there won't necessarily be fuel contamination of
the oil - what oil sampling can't detect is damage in the combustion
chambers; which is what you engine may have.
If an engine was being done for you I would probably 10 dowel the head
and fit ARP studs; however I wonder if John Welsh has gone to that trouble -
probably not; so I may be being over cautious - maybe just the ARP studs
would be enough for around the 400-450hp mark. The other thing I would do
for you is to fit iron liners - the alloy liners are a bit marginal at high
boost - they don't break; but they "pant" on the combustion cycle - which
can pop the head gasket. "
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