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Post by Mr Stabby on Feb 7, 2017 17:07:59 GMT
My engine (BMC 1.5) has a wire mesh air filter. One advantage that I can see is that it never needs to be replaced, just washed out and dried, but other than that what are the advantages and disadvantages of wire mesh air filters over paper element filters?
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Post by JohnV on Feb 7, 2017 17:21:58 GMT
probably lets more dust through ? ....... I suspect that in a boat there is unlikely to be the same amount of dust around that there would be in many shore based situations
My Daewoo engine in Sabina H has a wire mesh airfilter but it does have a sock of thin foam that fits over it.
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Post by Deleted on Feb 7, 2017 17:24:42 GMT
Wire mesh can never filter as efficiently as a paper element.
Many erroneously say there's not much to filter being close to water - that's before you take into account crap off your boots, dog hair etc
I fitted an air box from a Hyundai 1.6 coupe to ours. It knocked induction roar on the head and makes sure the motor isn't munching on a diet if grit and shite.
A Vauxhall Frontera air box went on my brothers Ormelite when I re-engined that, I wouldn't entertain running without one.
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Post by Deleted on Feb 7, 2017 17:26:26 GMT
probably lets more dust through ? ....... I suspect that in a boat there is unlikely to be the same amount of dust around that there would be in many shore based situations My Daewoo engine in Sabina H has a wire mesh airfilter but it does have a sock of thin foam that fits over it. He he!  Admittedly we walk over our engine all the time being an aft cockpit, the crap that gets down there is surprising. |
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Post by tonyb on Feb 7, 2017 17:51:27 GMT
1. the wire mesh and the foam variant are supposed to be soaked in oil and drained so the oil film helps trap dust. AS many BMCs have self oiling air filters I do not see the need for this but it would remove more dust - see below.
2. Some Vetus and Isuzu engines do not have air filters and do not seem to have a markedly reduced life. The Vetus ones have an intake silencer but no filter in it.
3. I knew of a hire fleet that ran their 1.5s with no inlet manifolds (not mine I hasten to add) and it did not seem to cause problems.
4. I was told that when London Transport actually ran their buses they found the cost of air filter elements was more than the cost of a slightly reduced engine life so did not fit them. I am not 100% convinced because I would expect the buses to use oil bath air cleaners at that time.
I think the use of an air filter for even inland marine use is very overstated but a mesh to stop larger objects getting into the intake is vital. It would also be a good idea if you have hairy pets on board or have an engine close to best etc but a wire gauze seem to deal with pet hairs and blanket fluff. However I still fit an element in my own air filter but if I had a BMC I would be perfectly happy with a dry wire mesh job.
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Post by Deleted on Feb 7, 2017 17:58:05 GMT
1. the wire mesh and the foam variant are supposed to be soaked in oil and drained so the oil film helps trap dust. AS many BMCs have self oiling air filters I do not see the need for this but it would remove more dust - see below. 2. Some Vetus and Isuzu engines do not have air filters and do not seem to have a markedly reduced life. The Vetus ones have an intake silencer but no filter in it. 3. I knew of a hire fleet that ran their 1.5s with no inlet manifolds (not mine I hasten to add) and it did not seem to cause problems. 4. I was told that when London Transport actually ran their buses they found the cost of air filter elements was more than the cost of a slightly reduced engine life so did not fit them. I am not 100% convinced because I would expect the buses to use oil bath air cleaners at that time. I think the use of an air filter for even inland marine use is very overstated but a mesh to stop larger objects getting into the intake is vital. It would also be a good idea if you have hairy pets on board or have an engine close to best etc but a wire gauze seem to deal with pet hairs and blanket fluff. However I still fit an element in my own air filter but if I had a BMC I would be perfectly happy with a dry wire mesh job. I disagree, particularly with cruiser stern narrow boats and aft cockpit cruisers. The amount of grit off your boots soon adds up - and as I mentioned earlier, induction roar is hugely reduced - win win as they say! I pay a fiver a filter and change it every 3 years - hardly a major expense. |
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Post by peterboat on Feb 7, 2017 19:09:49 GMT
I am in Gazzas camp completely, belts shed rubber and the air is full of crap which you dont want in your engine, paper element filters are far better than wire mesh jobbies and Tony is correct they are self oiling with BMCs
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Post by Ditchcrawler on Feb 9, 2017 20:58:11 GMT
My engine (BMC 1.5) has a wire mesh air filter. One advantage that I can see is that it never needs to be replaced, just washed out and dried, but other than that what are the advantages and disadvantages of wire mesh air filters over paper element filters? Dont you have to oil them after washing and drying |
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