Thread: More Stupid Questions About Stuff I Have No Buisness Asking About
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Old Tue, October 13th, 2009, 07:26 PM
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Originally Posted by theSLEEPER View Post
So... "Fast" injectors... I get a lot of run around asking about these...

I am just wondering basics of making them run and what the differences are.

Seems like to make it "fast" you have to increase the pressures all the way around... Spring pressures, opening up orfices, who knows what else... But I think the spring pressures on the nozzle valve are really important. If that pressure is higher, it seems like to have ICP reasonable, you'd have to advance SOI so that it would have time to overcome that pressure?

To make large nozzles idle without a lot of smoke, would you advance SOI and jack ICP up so that you get good atomization?
I have no idea about the first question since every injector "builder" is going to do something different to make the injector saturate and empty faster....it's all about the amount of fuel delivered in a short amount of time which revolves around how fast the oil can fill the intensifier and how quickly the fuel chamber can be emptied.

The second one is easy. Shorten the pulse width (injector on-time) and slightly increase the ICP.
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