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Old 05-16-2013, 12:22 PM   #31
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Remember these are direct injection injectors not regular injectors, much different beast. Also in order to take advantage you will have to upgrade the high pressure fuel pump (HPFP) by going either with duals like the BMW and Mercedes or a bigger surface area on the piston. I follow the Mazdaspeed guys because their platform came out in 2006, they've given getting enough fuel from the DI setup and are now piggybacking PI on top of it, the same thing I'm currently installing this week on my Flex. I'll be able to report back some finding on my transverse ecoboost V6 on stock (smaller than yours) turbos with E85 within 2 weeks. Hoping to see well over 400WHP/450WTQ on my baby GT15's on E85 - that HP level got me to mid 12's on my Flex with my nitrous setup.

Sorry, should have been more specific, I work for a diesel fuel injection manufacturer. We are obviously well versed in DI. I know what modifications can be done to increase fuel output, but you have to balance those as you don't want to begin to impinge on the walls or the piston.

The research is what would be cost prohibitive. The tips we can have manufactured for relatively cheap. But the overall cost for sales in maybe the hundreds per year is not worth it.

- Steiner
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Old 05-16-2013, 02:34 PM   #32
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Sorry, should have been more specific, I work for a diesel fuel injection manufacturer. We are obviously well versed in DI. I know what modifications can be done to increase fuel output, but you have to balance those as you don't want to begin to impinge on the walls or the piston.

The research is what would be cost prohibitive. The tips we can have manufactured for relatively cheap. But the overall cost for sales in maybe the hundreds per year is not worth it.

- Steiner
Find us a way to upgrade the HPFP first, we're not close to running out of injector just yet, need more capacity first.
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Old 05-16-2013, 03:27 PM   #33
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Find us a way to upgrade the HPFP first, we're not close to running out of injector just yet, need more capacity first.
You need higher rail pressure or more volume? Is the pump single duty cycle or varied? Don't know how they vary the rail pressure by pump or a regulator.

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Old 05-16-2013, 11:00 PM   #34
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I think it's volume we need...the rail pressures look pretty good (now I am talking way out of turn here---as I know very little about fuel).
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Old 05-17-2013, 12:32 AM   #35
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You need higher rail pressure or more volume? Is the pump single duty cycle or varied? Don't know how they vary the rail pressure by pump or a regulator.

- Steiner
So we have an in tank fuel pump that runs at 65 PSI that feeds a cam driven high pressure fuel pump. The excess fuel pressure is varied by both voltage control to the in tank fuel pump and a spill valve in the HPFP from what I understand.
It works almost identical to the Mazdaspeed DI setup if you are familiar with that.
Our HPFP falls off pressure under high boost, we need more volume on the HPFP to maintain the rail pressure.
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Old 05-17-2013, 05:56 AM   #36
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So we have an in tank fuel pump that runs at 65 PSI that feeds a cam driven high pressure fuel pump. The excess fuel pressure is varied by both voltage control to the in tank fuel pump and a spill valve in the HPFP from what I understand.
It works almost identical to the Mazdaspeed DI setup if you are familiar with that.
Our HPFP falls off pressure under high boost, we need more volume on the HPFP to maintain the rail pressure.
If the system is almost identical why cant we just upgrade the hpfp internals like I did on my speed 3?
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Old 05-17-2013, 09:41 AM   #37
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If the system is almost identical why cant we just upgrade the hpfp internals like I did on my speed 3?
I'm sure somebody is working on it, we even looked at doing dual pumps. For me on my Flex the path of least resistance was to add 6 additional injectors and an auxillary injector controller, mostly because my intake is aluminum so welding some bungs on it not super expensive. Geoff and I have hours of chats discussing fueling and options, I want 500WHP out of my Flex on E85 with upgraded turbos. We'll see if I can get there
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Old 05-17-2013, 10:21 AM   #38
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If the system is almost identical why cant we just upgrade the hpfp internals like I did on my speed 3?
I contacted autotech about upgrades, the same one you use on the MS3 is the same one the VW/AUDI guys use on the FSI motors as well.

Torque app for android phones can monitor rail pressure. It is all over the place from as low as 200psi up to 1200 ive seen.
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Old 05-17-2013, 02:11 PM   #39
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Another thing I forgot to mention, we were able to get a little more fuel over on the FSI platforms but upgrading the stock LPFP as the factory ones did not seem to keep up and the HPFP was found to be waiting on fuel, starving essentially, in some instances. By upgrading the LPFP the HPFP was always kept under positive pressure with full line waiting to feed it even under the most extreme WOT instances. So every time it accepted fuel it, the chamber filled completely.

Same thing the diesel guys have been doing for years with the Airdog and FASS systems, as well as those remove air and water too.

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Old 05-17-2013, 05:50 PM   #40
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Someone should contact CPE. They made a Hpfp upgrade for speed 3 and could probably come up with a lot of badass parts for our trucks
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Old 05-17-2013, 05:50 PM
 
 
 
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