I have a Petter PH1 on a dumper, rated at 6.8bhp @ 2000rpm. I have just had it rebored +20, ground the valves in and fitted a new injector nozzle (set at 800bar). It has run about 5 hours since and is still a bit smoky, I pulled the injector out this morn as the washer was leaking slightly and found quite a lot of carbon built up on the nozzle (which I didn't touch). With good compression and a new airfilter I can't see any other reason for what must be an incomplete burn but injector. So, is 800bar the correct pressure? should I try raising or lowering the pressure? Or is it that they are always smoky and as Jack Nicholson said "maybe this is as good as it gets" Kev
Petter PH1 smoky
Jun 22, 2008
3 Replies
800 bar sounds like you have got some wrong units in there, that's 11603psi
3150psi or 215 atmospheres is the correct pressure.
If the engine isn't getting up to temperature, then you'll get various problems with the engine, especially ring seating.
Peter
-- Peter & Rita Forbes Email: snipped-for-privacy@easynet.co.uk
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e:
800bar? DOH! - I meant 180bar. So if it is set too low does that mean it will be injecting in too early? Kev
No, probably too late if anything, try getting the pressure up and see what it is like.
Low pressure build-up will delay the onset of injection.
Peter
-- Peter & Rita Forbes Email: snipped-for-privacy@easynet.co.uk
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