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Post by slingy1052 on Sept 8, 2014 7:38:11 GMT
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Post by katana on Sept 8, 2014 17:43:21 GMT
The NLR / Emtes one I used is about the same as that little one. They are only dealing with tiny amounts of oil and the small one will be over-sized for what it has to do. Rotation direction may be an issue as the inlet / outlet ports can be directional, so it may work but with reduced efficiency? Piccy of the Emtes one - thats an M8 screw that holds ign rotor and provides drive via the hex.
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Post by slingy1052 on Sept 8, 2014 19:50:20 GMT
Thanks katana. Jesus, that's tiny. The rotor looks about the same diameter as the head of the cap screw. I was only going to use the gears from the egay pump and make my own body so ports will be made to suit.
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wombat258
Oviraptor
Posts: 17
Bikes: GSXR1100WS
Reg: Dec 1, 2013 9:30:22 GMT
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Post by wombat258 on Sept 8, 2014 21:01:12 GMT
I made mine using the pit bike oil pump gears to fit in place of the water pump on the watercooler. They actually shift a good amount of oil for their size.
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Post by slingy1052 on Sept 8, 2014 22:52:39 GMT
Cheers for that Wombat. If yours is driven from the old water pump, is that crank speed or less? Just curious. I have emailed seller to try and get specs on the internal gears (diam and thickness) . I remember someone saying there were good and not so good pit bike pumps, based on there thickness. Just can't remember what they were. You don't happen to know how thick yours were do you?
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Post by gsxhartley on Sept 9, 2014 6:57:10 GMT
I used the gears from a Suzuki RV125 for the one that was fitted to Proffie's slabside turbo.
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wombat258
Oviraptor
Posts: 17
Bikes: GSXR1100WS
Reg: Dec 1, 2013 9:30:22 GMT
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Post by wombat258 on Sept 9, 2014 9:02:21 GMT
Slingy, the standard Honda CT90 gears are around 5.5mm thick, and the Chinese uprated gears (50% more flow, they say) are 8.5mm. The gear diameters and housing offsets were identical. I actually used a combination of standard Honda (drive pin and steel bearing bush), and chinese replica (gear set). The water pump runs at about 60% engine speed, and a test with a drill indicates that the scavenge pump will flow 1 to 4 litres per minute over the engine rev range. There is a guy on the web who made the same setup for a crankshaft driven slabbie . . . on a machining forum.
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Post by katana on Sept 9, 2014 19:31:18 GMT
Thanks katana. Jesus, that's tiny. The rotor looks about the same diameter as the head of the cap screw. I was only going to use the gears from the egay pump and make my own body so ports will be made to suit. Sorry - the M8 was bogus - it was M10, so that make the rotor a bit bigger - but it is still small. The hex for the pump drive fitted the M10 cap head and then we machined the screw down to a hex to fit the M8 of the Gixer rotor.
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Post by slingy1052 on Sept 9, 2014 21:43:26 GMT
Ok, cheers Katana, like you say, still very small. Think i will get the Pit Bike pump and have a look.
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Post by CHR15 on Sept 10, 2014 22:02:41 GMT
the uprated Chinese c90 pumps are good for journal bearings. i did flow testing using a td04 and a set of iirc 8mm thick gears and they matched pretty well.
the thinner original honda ones (which you can buy brand new from honda) should work well with bb turbos from what i remember i calculated.
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Post by slingy1052 on Sept 17, 2014 10:06:12 GMT
So, does this look about right the pump gears to use ? They are 8.75mm thick.
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Post by CHR15 on Sept 17, 2014 16:50:19 GMT
that'll do you fine for a journal bearing if you spin it at crank speed.
i can give you a dxf of the port timing if you want.
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Post by slingy1052 on Sept 17, 2014 21:01:32 GMT
that'll do you fine for a journal bearing if you spin it at crank speed. i can give you a dxf of the port timing if you want.
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Post by slingy1052 on Sept 17, 2014 21:20:51 GMT
Don't know what happened with that last post, went to quote you and it just posted it straight away, but, yeah thanks any info is good
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Post by CHR15 on Sept 18, 2014 17:04:29 GMT
pm me an email address
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