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pump timing
by
dieselsmoke
on 19 Aug, 2008 10:39
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I was looking in the manual and it says for the 93-96 1.9 AAZ turbo pump timing that it should be .80. Why is it so low for these newer pumps as compared to the old pumps. I heard someone say that you can still set these to 1.00 -1.05, is this true? Will this effect anything on these pumps? If I do set it higher which would I want it at 1.00 or 1.05? Thanks
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#1
by
burnt_servo
on 19 Aug, 2008 11:12
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isn't the injector pop presure slightly lower than the 155 bar used on the older engines ?
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#2
by
blkboostedtruck
on 19 Aug, 2008 11:45
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AAZ injectors are 150bar on the dual stage injectors that i've seen!
but i don't know what the key setting is?
someone will chime in on that setting?
Duane
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#3
by
dieselsmoke
on 19 Aug, 2008 14:21
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For the dual stage injectors the first stage is supposed to be 155 bar which is what mine are set too. I don't know what the second stage is but I know that you need some special equipment to test it. I am just curious about the pump timing. Going from .80 to 1.00 or 1.05 is alot.
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#4
by
jimfoo
on 19 Aug, 2008 17:19
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I was running mine at 1.0mm.
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#5
by
jtanguay
on 19 Aug, 2008 17:29
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lower timing = less NOx. increase timing = higher NOx. probably the single reason for the lower timing. increase it to about .90 or even 1.00 and enjoy increased power and possibly mileage? lower timing also gives a quieter running engine and a bit more torque.
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#6
by
Smokey Eddy
on 19 Aug, 2008 18:48
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VERY interesting....
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#7
by
dieselsmoke
on 20 Aug, 2008 09:05
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If I turn it up to .95 or 1.0 mm will I get smoke coming out of the exhaust or should I be ok?
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#8
by
jtanguay
on 20 Aug, 2008 09:09
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If I turn it up to .95 or 1.0 mm will I get smoke coming out of the exhaust or should I be ok?
if you do its because something is wrong inside the engine :lol: or you turned up your fueling too high.
ideally though you want the .80 timing for idle only, and as soon as you hit the accelerator you want the increased timing. not only does it consume a bit less fuel, but it also gives you a nice quiet idle :wink: some AAZ pumps have a solenoid that retards the timing... that in conjunction with an idle switch (to activate the timing retard device) on the pump could give you that
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#9
by
dieselsmoke
on 20 Aug, 2008 14:03
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Will the car still idle ok if I advance it to .95 or 1.0 mm or is it going to idle rougher? Does this effect anything for cold weather like when it goes down to -35 celcius in the winter time?
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#10
by
jtanguay
on 20 Aug, 2008 14:11
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actually cold starting is better with increased timing... it will get louder though thats for sure :lol:
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#11
by
bert
on 20 Aug, 2008 14:18
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my AAZ is set at 0.95 and the cold starts are loads better,i dont use the cold start anymore :wink: and the power is amazing
Bert