Manitoba SS 2015
02-24-2015, 01:08 PM
#401
That's the thing. Kevins never fully plugged. Just lost some flow in 1 nozzle. And that's why I say in his case the fail safe probably wouldn't pick it up. The loss of flow would be minimal having 3 other nozzles spraying at the same time. But it was enough of a loss to take down a cylinder.
Go get greedy with meth it doesn't bother me any. But I've learnt my lesson doing so.
Go get greedy with meth it doesn't bother me any. But I've learnt my lesson doing so.
Last edited by Bluelightning; 02-24-2015 at 01:14 PM.
02-24-2015, 02:35 PM
#402
Senior Member
I agree the failsafe will not pick up on a plugged nozzle and that cyl is done. It'll just up the flow to the rest of the working nozzles
02-24-2015, 07:58 PM
#406
Senior Member
What I did is turned up the pressure so my 625 cc nozzle flows 1000cc flow will go down but by enough to trip the sensor???
02-25-2015, 09:58 AM
#409
Senior Member
Sorry Tom I forgot I said I'd post the link to that bung well here it is you install this where the vacuum hose is right over the throttle body just grind it smooth
Additional Injector Holder Kit : atpturbo.com
Additional Injector Holder Kit : atpturbo.com
02-25-2015, 01:31 PM
#411
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as far as i know, these pumps have an internal regulator to like 100 or 200 psi, depending on the pump. when one nozzle is clogged, pump pressure would remain the same and therefore the remaining nozzles would flow the same.
think of another example: If you were to plug or even remove one of your fuel injectors in your fuel system, the flow to the others would not increase, and would remain the same. the regulator would sense the increased pressure and would then react by lowering the fuel pressure back to what it was, had a clog not occured.
Same thing is happening here.
And I dont know what the range limits are on the failsafe for % of flow changed in order to set the failsafe, but one nozzle of 4 clogging would be a 25% rduction in flow. Had this nozzle been only "half-clogged" or flowing half of what it should, then the flow rate would decrease by 12.5%. is this within the ragne on the aem's failsafe detection?
02-25-2015, 03:00 PM
#418
Senior Member
How does the flow get "upped" to the remaining injectors? These pumps are self regulating are they not?
as far as i know, these pumps have an internal regulator to like 100 or 200 psi, depending on the pump. when one nozzle is clogged, pump pressure would remain the same and therefore the remaining nozzles would flow the same.
think of another example: If you were to plug or even remove one of your fuel injectors in your fuel system, the flow to the others would not increase, and would remain the same. the regulator would sense the increased pressure and would then react by lowering the fuel pressure back to what it was, had a clog not occured.
Same thing is happening here.
And I dont know what the range limits are on the failsafe for % of flow changed in order to set the failsafe, but one nozzle of 4 clogging would be a 25% rduction in flow. Had this nozzle been only "half-clogged" or flowing half of what it should, then the flow rate would decrease by 12.5%. is this within the ragne on the aem's failsafe detection?
as far as i know, these pumps have an internal regulator to like 100 or 200 psi, depending on the pump. when one nozzle is clogged, pump pressure would remain the same and therefore the remaining nozzles would flow the same.
think of another example: If you were to plug or even remove one of your fuel injectors in your fuel system, the flow to the others would not increase, and would remain the same. the regulator would sense the increased pressure and would then react by lowering the fuel pressure back to what it was, had a clog not occured.
Same thing is happening here.
And I dont know what the range limits are on the failsafe for % of flow changed in order to set the failsafe, but one nozzle of 4 clogging would be a 25% rduction in flow. Had this nozzle been only "half-clogged" or flowing half of what it should, then the flow rate would decrease by 12.5%. is this within the ragne on the aem's failsafe detection?
02-25-2015, 05:08 PM
#419
How does the flow get "upped" to the remaining injectors? These pumps are self regulating are they not?
as far as i know, these pumps have an internal regulator to like 100 or 200 psi, depending on the pump. when one nozzle is clogged, pump pressure would remain the same and therefore the remaining nozzles would flow the same.
think of another example: If you were to plug or even remove one of your fuel injectors in your fuel system, the flow to the others would not increase, and would remain the same. the regulator would sense the increased pressure and would then react by lowering the fuel pressure back to what it was, had a clog not occured.
Same thing is happening here.
And I dont know what the range limits are on the failsafe for % of flow changed in order to set the failsafe, but one nozzle of 4 clogging would be a 25% rduction in flow. Had this nozzle been only "half-clogged" or flowing half of what it should, then the flow rate would decrease by 12.5%. is this within the ragne on the aem's failsafe detection?
as far as i know, these pumps have an internal regulator to like 100 or 200 psi, depending on the pump. when one nozzle is clogged, pump pressure would remain the same and therefore the remaining nozzles would flow the same.
think of another example: If you were to plug or even remove one of your fuel injectors in your fuel system, the flow to the others would not increase, and would remain the same. the regulator would sense the increased pressure and would then react by lowering the fuel pressure back to what it was, had a clog not occured.
Same thing is happening here.
And I dont know what the range limits are on the failsafe for % of flow changed in order to set the failsafe, but one nozzle of 4 clogging would be a 25% rduction in flow. Had this nozzle been only "half-clogged" or flowing half of what it should, then the flow rate would decrease by 12.5%. is this within the ragne on the aem's failsafe detection?
02-25-2015, 08:09 PM
#420
If the pump is regulated by pressure and not flow then theoretically it shouldn't cause the other rail to increase pressure and therefore flow of the other 3.
But the over all flow would reduce from the pump. That seems like sound logic.
But the over all flow would reduce from the pump. That seems like sound logic.
02-26-2015, 09:49 AM
#421
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The aem gauge can be set to trip wherever u want it, u program it with software and use a graph to plot ur failsafe threshold. I'm not gonna be using the system, but I will check into this anyway just to know. If it does trip easily I may use the system. I think there is a lot of guessing but no one has ever checked if it would trip or not. It's possible that the other 3 injectors would just spray harder. What km says makes sense
02-26-2015, 12:01 PM
#422
That is true. If it was a matter of volume staying the same then the other nozzles would have to move more fluid to compensate for the clogged nozzle to keep the volume through the regulator the same, but it is pressure regulated, so the regulator will just pull back flow since it will see a rise in pressure, which will decrease flow which of course decreases volume. Will it be enough to trip the fail safe is the only thing in question.
02-27-2015, 01:58 PM
#425
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since all yo cars be put away this winter, here is farmerz24's daily driver - running 24/7 rain, sleet, shine, or snow.
gm 3900 VVT pushrod into a 05 legacy gt. 5 speed AWD.
MS3-pro powered.
stock tach works by way of an additional circuit speaking to the MS3-pro via CAN communications protocol and spoofing the crank sensor input. This allows the stock tach to to work along with the stock DBW TB controlled by the SUBY ECU.
Also had to install outback king springs 1 inch lift and outback 225/60/17 rubber for the ultimate in ground clearance.
gm 3900 VVT pushrod into a 05 legacy gt. 5 speed AWD.
MS3-pro powered.
stock tach works by way of an additional circuit speaking to the MS3-pro via CAN communications protocol and spoofing the crank sensor input. This allows the stock tach to to work along with the stock DBW TB controlled by the SUBY ECU.
Also had to install outback king springs 1 inch lift and outback 225/60/17 rubber for the ultimate in ground clearance.