Does anybody know the Bosch part number for the ABZ fuel injector?
02-04-2005, 08:44 AM
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With the 2.7t we upgrade the injectors to 42lb injectors...
that are the same as those from 5.0 Mustangs and/or the Ford Lightning... since it is all Bosch underneath. You can score a full set of 8 from e-bay for $300 or less.
02-04-2005, 07:30 PM
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Re: Does anybody know the Bosch part number for the ABZ fuel injector?
Paul,
I had my ABZ fuel injectors (from my 1998 A8) tested by C&C Fuel Injection of Reno Nevada.
They recorded Bosch Injector part Number 0280 150 508
The injectors were tested at 40 psi and rated at 18 lbs/hr which would seem to be on the low side until one checks out the fuel pressure regulator on the ABZ engine which is vacuum controlled and which has a high pressure output of about 62.5 PSI . This means that at full pressure the injectors are delivering somewhere in the lower 20 lbs per hour range which is plenty for a moderate performance cam or for a low pressure blower.
The injectors are also unusual in that they have a vacuum line coming from the side. Ths must have something to do with reducing output at high vacuum for better milage or emissions??
It would be nice to pick the brain of a fuel injector expert on this. I will try giving the guys at C&C FuelInjection a call to see if they can shed some light on these injectors.
The pintel design also appears to be of a more advanced , high atomization design.
I had my ABZ fuel injectors (from my 1998 A8) tested by C&C Fuel Injection of Reno Nevada.
They recorded Bosch Injector part Number 0280 150 508
The injectors were tested at 40 psi and rated at 18 lbs/hr which would seem to be on the low side until one checks out the fuel pressure regulator on the ABZ engine which is vacuum controlled and which has a high pressure output of about 62.5 PSI . This means that at full pressure the injectors are delivering somewhere in the lower 20 lbs per hour range which is plenty for a moderate performance cam or for a low pressure blower.
The injectors are also unusual in that they have a vacuum line coming from the side. Ths must have something to do with reducing output at high vacuum for better milage or emissions??
It would be nice to pick the brain of a fuel injector expert on this. I will try giving the guys at C&C FuelInjection a call to see if they can shed some light on these injectors.
The pintel design also appears to be of a more advanced , high atomization design.
02-06-2005, 05:05 AM
#7
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Interesting, I got 20.96 lb/hr in my calcs based on Bently data
Which would result in about 300 HP with 8 injectors.
I figure we would need 29 lbs/hr for 425 HP.....don't know if a rising rate fuel pressure regulator will work or not.
pw
I figure we would need 29 lbs/hr for 425 HP.....don't know if a rising rate fuel pressure regulator will work or not.
pw
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02-06-2005, 07:42 AM
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Re: Interesting, I got 20.96 lb/hr in my calcs based on Bently data
Chaeck out the data on the stock fuel pressure regulator and then inspect your fuel pressure regulator. You will find that the stock out put pressure varies depending upon the engine vacuum. The manual lists the max operating pressure and the test pressure for the injectors.
Your claculations are probably correct. Just keep in mind that when the engine is operating the injector volume varies greatly based on both electrical and mechanical variables.
The one thing that I am going to check on is the design of this particular injector which has a vacuum port on the side. You will note the vacuum line connecting all of the injectors when you remove the top engine cover.I dont know how the fuel injector shop set up the injectors on the test stand and what if anything they did about the open vacuum port on the side. I will try to find out.This may explain the difference in your calculations and their test results.
My injectors were all within spec and didn't need rebuilding. I am convinced that the output on high demand is sufficient with the modified cam I have installed given that upper limits of the fuel pressure regulator output and the fact that you are not running at Wide Open Throttle 100% of the time. The ECU injector pulse width would also have been modified with my new chip.
Your claculations are probably correct. Just keep in mind that when the engine is operating the injector volume varies greatly based on both electrical and mechanical variables.
The one thing that I am going to check on is the design of this particular injector which has a vacuum port on the side. You will note the vacuum line connecting all of the injectors when you remove the top engine cover.I dont know how the fuel injector shop set up the injectors on the test stand and what if anything they did about the open vacuum port on the side. I will try to find out.This may explain the difference in your calculations and their test results.
My injectors were all within spec and didn't need rebuilding. I am convinced that the output on high demand is sufficient with the modified cam I have installed given that upper limits of the fuel pressure regulator output and the fact that you are not running at Wide Open Throttle 100% of the time. The ECU injector pulse width would also have been modified with my new chip.
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