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#1
05-19-2011, 11:08 AM
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injector modification...
I HAVE NO EXPERIENCE WITH PERFORMANCE MODS
just thought I'd put that out there up front. I was driving on the highway thinking... I know dangerous territory, but I digress... modern bluetec and other DI motors have several reasons for massive HP... but fuel atomization and delivery/control are the biggest ones I think... I'm wondering if having an injector with more than one point of fuel spray would improve combustion/burn... like an injector with 3 or 4 nozzels instead of one. perhaps with different spray pressures on them, so a short burst, large burst, and medium burst... timing would be interesting, but how would something like that be worked? I think injectors are pressurized to have pulses during stroke... why not pulses on multiple nozzels in the PC?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere! 
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#2
05-19-2011, 05:28 PM
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I believe IDI's are restricted to a single jet of fuel directed at the impingement ball. You can improve injection efficiency by installing larger pump elements which of course, has the potential to injector a larger quantity as well as shortens injection duration.
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-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250
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#3
05-19-2011, 07:07 PM
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Modern, electronically controlled injection systems can(and do) do multiple injections for each power stroke. Our mechanical systems can not.
From what I have read and learned injectors seem to be good for at least 300hp on the 617 engines. injection pumps need mods (bigger elements)to make that, and a differant turbo. There is a good thread about pc modification, this is next on my list, and may well be followed by bigger elements.
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1977 240D turbo
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#4
05-19-2011, 08:41 PM
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VW TDI's (starting mid 90's) used injectors with 5 hole nozzle tips and 2 stage pop (pilot and main injection) by using 2 sets of springs in the injector.
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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#6
05-19-2011, 09:02 PM
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Is that 2 stage happening at the injector or the element or DV?
__________________
-Evan Benz Fleet: 1968 UNIMOG 404.114 1998 E300 2008 E63 Non-Benz Fleet: 1992 Aerostar 1993 MR2 2000 F250
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#8
05-19-2011, 10:20 PM
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Can't use those VW TDI injectors in the 617. You can use the non TDI two stage and they produce a very quiet engine and more power on the upper end, less on the low end. I have such a set, but with the Myna pump and stock turbo I think I'd rather have the low power back. I may switch with my wife's car stock injectors soon.
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#9
08-09-2011, 02:05 AM
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Quote:
Here are the injectors I installed. http://www.youtube.com/watch?v=6hmGSMiDo98 The biggest problem is finding an injection shop capable of adjusting both stages. All the engines they're used in are Canadian so finding a local option is next to zero chance, thats what made me give them up.
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