injector reconditioning
Discussion
I seem to be having trouble getting replies from my two favourite injector reconditioning companies, so it got me thinking about maybe doing this myself.
The ASNU machine seems to be the industry favourite .. are there others on the market ?
Also is there an injectors-R-us type place where you can get the filters etc for the various injector makes all from one place or do you have to buy each make of filter from different places.
It's not an area I've ever investigated before because I've never had trouble getting hold of my favourite reconditioners before.
Any help / advice appreciated. cheers.
The ASNU machine seems to be the industry favourite .. are there others on the market ?
Also is there an injectors-R-us type place where you can get the filters etc for the various injector makes all from one place or do you have to buy each make of filter from different places.
It's not an area I've ever investigated before because I've never had trouble getting hold of my favourite reconditioners before.
Any help / advice appreciated. cheers.
tload of them.I have a simple test setup to check flow rate and spray patters. You can get rebuild kits if they need servicing. Mine didn't, so I don't know how easy it would be to DIY but I'm sure you'd have no problem doing it. I would have thought it was worth sending them away to be done professionally though if you're doing this commercially - the right equipment would make this job much quicker and easier.
Thanks for replies.
I don't have sets to send away as such .. what I've done in the past is give my injector reconditioners the flow rates I need and they supply me a set of reconditioned injectors to suit. They must be very busy or both coincidently on holiday right now but will keep trying them.
I don't mind buying equipment to get the convenience .. time spent chasing suppliers could be time spent doing it myself IYSWIM.
I don't have sets to send away as such .. what I've done in the past is give my injector reconditioners the flow rates I need and they supply me a set of reconditioned injectors to suit. They must be very busy or both coincidently on holiday right now but will keep trying them.
I don't mind buying equipment to get the convenience .. time spent chasing suppliers could be time spent doing it myself IYSWIM.
I can't imagine that the DIY approach makes sense commercially, but my time was free and it was something I was interested in doing.
My setup is far more crude than you are probably imagining. I set up a pump/regulator/pressure gauge loop mounted on a board which cycles fuel out of a small container and returns the excess back to the the container. With the feed and return submerged there is minimal splashing. The container has a splash/dirt guard but is not sealed.
A tee from this circuit feeds a hose which is a tight push fit on the injector. The injector is positioned in a small glass container which has a volume scale marked on the side. That is also covered with an unsealed lid. There's quite a lot more spray here but still not a huge amount. The lid contains it pretty well.
It takes a couple of minutes to test an injector spray pattern across a range of frequencies and duty cycles and measure the full flow rate. That's really all I needed.
Electrics are all on the back of the board. Electronics are in hermetically sealed boxes. Switches are in IP66 rated enclosures. Nothing is ever switched on or off apart from via the sealed switches. I checked the tightness of the injector and pump connectors very carefully and secured all the wiring to minimise the risk of a connection being disturbed.
No liquid petrol escapes.There is a noticeable smell when using it, but no worse than any other time that a petrol container is unsealed. I make sure the workspace is well ventilated but it doesn't IMO need any other special precautions. I would not want to take responsibility for somebody else using it and it would never pass OSHA, but I'm comfortable using this at my own risk.
My setup is far more crude than you are probably imagining. I set up a pump/regulator/pressure gauge loop mounted on a board which cycles fuel out of a small container and returns the excess back to the the container. With the feed and return submerged there is minimal splashing. The container has a splash/dirt guard but is not sealed.
A tee from this circuit feeds a hose which is a tight push fit on the injector. The injector is positioned in a small glass container which has a volume scale marked on the side. That is also covered with an unsealed lid. There's quite a lot more spray here but still not a huge amount. The lid contains it pretty well.
It takes a couple of minutes to test an injector spray pattern across a range of frequencies and duty cycles and measure the full flow rate. That's really all I needed.
Electrics are all on the back of the board. Electronics are in hermetically sealed boxes. Switches are in IP66 rated enclosures. Nothing is ever switched on or off apart from via the sealed switches. I checked the tightness of the injector and pump connectors very carefully and secured all the wiring to minimise the risk of a connection being disturbed.
No liquid petrol escapes.There is a noticeable smell when using it, but no worse than any other time that a petrol container is unsealed. I make sure the workspace is well ventilated but it doesn't IMO need any other special precautions. I would not want to take responsibility for somebody else using it and it would never pass OSHA, but I'm comfortable using this at my own risk.
I simply put an old car battery charger transformer with half wave rectification onto the injectors so they opened and closed at 50 Hz. I used carb cleaner in an ultrasonic bath and submerged just the tips in the solution and ran the injectors for 10 mins like this. My thinking was to open and close the injector so the ultrasonics could do it's stuff when the injector was open. After all it's just the tips that foul up, so I did not see the need to pump the solution through. There was a marked difference to the plug insulator colouring after I did the work, it was far more even, so cleaning them seemed to have worked. I did not measure the output however.
Thanks everyone fr the replies. I like the simplicity of the old battery charger and carb cleaner/bath approach for cleaning, and then mount them in an old fuel rail and firing into same sized containers for flow testing.
After having seen the ASNU machine videos there seems to be a heck of a lot of spray/mist lost to atmosphere so that aspect doesn't seem critical, or balances out over the test sample number on a long enough test period.
I've just bought some really nasty old dirty injectors off ebay and I'm going to give it a whirl. If nothing else it will pass a quiet sunday afternoon
cheers all
After having seen the ASNU machine videos there seems to be a heck of a lot of spray/mist lost to atmosphere so that aspect doesn't seem critical, or balances out over the test sample number on a long enough test period.
I've just bought some really nasty old dirty injectors off ebay and I'm going to give it a whirl. If nothing else it will pass a quiet sunday afternoon
cheers all
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