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Since I got two bad injectors in that deal (set of 6) I took it upon myself to disassemble one of them to see how it works. They aren't serviceable to the extent that you can disassemble them by removing clips, bolts, etc. Uh uh, no way. These things are stamped together. BUT - they could be easily upgraded. I dont have pics right now, but I will post them later. But to describe the process...
The end of the injector that sprays fuel is simply a small hole with a valve. The valve itself also has the small pintle that spreads the fuel as it leaves the hole. When the coil is energized, the magnetism created by it pulls the valve/pintle back and allows fuel to exit. The hole itself is rather small, probably .75mm diameter. At 370cc/min flow per .75mm diameter, a small increase of that bore size will increase the fuel flow. I haven't sat down and done the math on it yet, but that's beside my point right now. The nozzle can be removed by grinding the crush sleeve and simply pulling it out. The valve/pintle, retainer, nozzle and rubber o-ring seal come out as one piece. The valve/pintle just slides right out the back. Of course, once the assembly is ground to remove the nozzle, there is no material left to re-stamp it back together. BUT, there is plenty of material below the o-ring to allow for small bores to be made and threaded to accomodate small machine screws to hold it together - and it wont leak. The reason an injector fails isn't mechanical, its the electrical coil that goes bad. I won't even begin to get into replacing the coil, as far as I am concerned, after taking it apart, replacing the coil would be impossible for all practical purposes - besides, where you going to get a new coil? So with that said, I am going to do some of the math and figure what the bore size would need to be in order to get a flow of 555cc/min and 720cc/min. I am going to get another set of injectors and if everything goes well and testing shows that this can be done and they can be made to flow consistent amounts of fuel and atomize properly, then I am going to jump all into disassembling the new set and boring them out to make my own 555s or even 720cc.. :-) I'll keep you all posted.
If anyone wants to donate a set of injectors for the cause, I would be happy to compensate them with some goodies.
Cough cough illuminated rear panels cough cough white face guages cough cough ;)
My CarPuter Headquarters:
[ ashleypowers.terrashare.com ]
agpowers@bellsouth.net
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