I bought a gunson compression tester from halfords.
Did cylinder 2,5 and it read 125psi
Is that bad or average,there is some bore wear
James
Compression test 125psi good or bad
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hi mate.
you should test them all, it's just as important - if not more important - that they're not too far out of the way of each other..
from my experience (bikes usually) 125psi will be okay, but I'd want more like 160 I think, what are your gaskets like + if you can take the cylinder head off one bank & turn it over while you check the top of the cylinder sleeves (where the piston rings slide upto), and check there aint a lot of wear there. if there's no wear you just need new piston rings/gasket, if there's a lot of wear, you will want a hone/rebore in the near future..
you don't want the least compression to be much more than 10psi below the most compression cylinder.. 2 or 3psi if you plan on race tuning it.
cheers mate
James
ps mate
can u say what engine u got so maybe someone know the factory compression ratings
you should test them all, it's just as important - if not more important - that they're not too far out of the way of each other..
from my experience (bikes usually) 125psi will be okay, but I'd want more like 160 I think, what are your gaskets like + if you can take the cylinder head off one bank & turn it over while you check the top of the cylinder sleeves (where the piston rings slide upto), and check there aint a lot of wear there. if there's no wear you just need new piston rings/gasket, if there's a lot of wear, you will want a hone/rebore in the near future..
you don't want the least compression to be much more than 10psi below the most compression cylinder.. 2 or 3psi if you plan on race tuning it.
cheers mate
James
ps mate
can u say what engine u got so maybe someone know the factory compression ratings