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Old 18 January 2009, 11:13   #11
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Good plan , pick up some spare filter to keep on board, at 3 each they are cheap enough to just change if you get water or muck in there.

Pete
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Old 18 January 2009, 12:27   #12
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i still have a slab of them in the garage! from the days when we used to buy 20 for 10!
I will keep a few handy! the reason i want an extra water filter is the Barrus grey tanks on the SR are prone to getting water in through the fuel gauges.
the standard non gauge lids are fine, and i paid 50 for the gauges and i have never kept fuel in the tank long enough to read the gauge!
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Old 18 January 2009, 13:31   #13
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Just read the Crossland filter books for ya. There appears to be no differentiation between the filter medium for petrol or diesel. Both are currently 2microns pore size at 98.7% efficiency and have been since 2004. However, if you've got a pile of them from umpteen years back, there's no guarantee that the pore size was that small.

For info; oil filters are 10microns for 99.5% efficiency and air filters are 25microns at 99% efficiency.
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Old 18 January 2009, 13:37   #14
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cheers, thats pretty much what my mate said.
most of the crap thay dont stop is sub micron
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Old 18 January 2009, 14:58   #15
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Quote:
Originally Posted by Pete7 View Post
Agreed its a diesel filter and I haven't said otherwise but have said they work with petrol too. I like lots of folk on here just use them for petrol. Been using them since 1997 I think, never had a problem, they just work, filtering fuel.

and your point is? why not have both, the glass bowl sorts the water and the course filter stops nasty stuff reaching the engine.

Oh good at least we agree on that.


Couldn't agree more which is why we have a CAV filter first then the Optimax filter mounted in the engine. When I was using older carb engines I used the CAV filter on its own, but the Opti has its own cannister filter inside the engine so the fuel is filtered twice. So what exactly is your problem with my set up ? are you aware that an Opti has a full canister fuel filter inside the engine cover rather than the normal small plastic filter you may have on your Honda.

So in essence what does it take to get some people to agree with you on this forum? well I don't remember not agreeing with you. There is a cost element that is worth considering with this issue too. Price up a 522 filter from any cheap motor factors then ask you Merc/Mariner dealer how much an opti filter is. You don't want to change the opti filter more than necessary but a job lot of 522s are less than 3 each.

Pete
Jeeze .. how long did it take you post that I aint never seen a petrol engined car/bike or what ever, fitted with a 522 yet,.. thats all I was saying in my original posts,.. and, like I agreed, as a prefilter, it would work ok, especially as an aglomerator, because of the sediment bowl fitting underneath.

But, as to Doggys original post, there was no mention of any other filter in his system for his Yammie, so I said no because its sold as a diesel filter, how complicated was that ?
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Old 18 January 2009, 17:54   #16
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I use the Delphi 296 as filter and water separator for my E-Tec 200. I like the clear glass underneath the filter. Now water can be detected immediately. No problems with the motor so far.
But now I start thinking: as the filter is originally made for Diesel engines which are not as thirsty as petrol ones: can the filter deliver enough petrol at WOT? Anybody?
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Old 19 January 2009, 04:45   #17
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Originally Posted by shthpnz View Post
I use the Delphi 296 as filter and water separator for my E-Tec 200. I like the clear glass underneath the filter. Now water can be detected immediately. No problems with the motor so far.
But now I start thinking: as the filter is originally made for Diesel engines which are not as thirsty as petrol ones: can the filter deliver enough petrol at WOT? Anybody?
I would think so. They are fitted to diesels in the 200Hp range and get enough flow to run them, AND return a considerable flow back to the tank down the return line.
if you pull one to bits and look at the surface area of the paper its massive, you could wallpaper your front room with one
there is a double length one available too.

Quote:
Jeeze .. how long did it take you post that I aint never seen a petrol engined car/bike or what ever, fitted with a 522 yet,..
i would think its down to cost, most petrol cars of the pre injection era only had a little plastic cheap filter, if a filter at all, the one in the yamaha powerhead may stop a dead spider but thats about it, its as cheap and crap as they could get away with. Modern injection cars use disposable ones too, expensive to replace, but cheaper initially as there is no housing, and lighter, lower part count on the production line. they dont need replacing very often either, petrol seems to be a lot cleaner than diesel in general.
I never changed the one on the corsa, its done 105,000now
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