Fuel Injectors for big HP engines

Talk and Tech about turbocharged 924/944/968 cars
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Fejjj951
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We are currently doing a 3L/2.7 Turbo build with lots of goodies💰. This motor will likely be pushing 500 WHP on E85. A few people I have spoken with have suggested the Injector Dynamics 1300’s. They are 1k for 4. As anyone who has ever done 1 of these builds knows, it is “Death by a thousand cuts” and I am bleeding profusely. Any suggestions for other quality injectors would be greatly appreciated.

#1

michaelmount123
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Try this: https://www.fiveomotorsport.com/flow-rate-calculator
Usually good prices too!

#2

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Tom
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Fejjj951 wrote: Mon Mar 31, 2025 7:20 pm We are currently doing a 3L/2.7 Turbo build with lots of goodies💰. This motor will likely be pushing 500 WHP on E85. A few people I have spoken with have suggested the Injector Dynamics 1300’s. They are 1k for 4. As anyone who has ever done 1 of these builds knows, it is “Death by a thousand cuts” and I am bleeding profusely. Any suggestions for other quality injectors would be greatly appreciated.
I used the ID1300 on my 3L. Not sure they flow their full rated capacity. I did get 500rwhp on a dynojet while running 103 octane gasoline, and am not entirely sure they had the headroom with a 3Bar FPR to match that on E85, so you might be careful there. Mine might be a first generation too, as it looks like they updated them and the new specs seem better than mine. One more little cut, but you'll likely need a bigger fuel pump too for that power on E85. I've run the true Bosch 044 pump and the AEM 044 knock off, and would say they are equally good. Of course, they draw more current, so running higher capacity wires on a separate relay is wise too...

#3

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Fejjj951
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Tom wrote: Tue Apr 01, 2025 10:29 am
Fejjj951 wrote: Mon Mar 31, 2025 7:20 pm We are currently doing a 3L/2.7 Turbo build with lots of goodies💰. This motor will likely be pushing 500 WHP on E85. A few people I have spoken with have suggested the Injector Dynamics 1300’s. They are 1k for 4. As anyone who has ever done 1 of these builds knows, it is “Death by a thousand cuts” and I am bleeding profusely. Any suggestions for other quality injectors would be greatly appreciated.
I used the ID1300 on my 3L. Not sure they flow their full rated capacity. I did get 500rwhp on a dynojet while running 103 octane gasoline, and am not entirely sure they had the headroom with a 3Bar FPR to match that on E85, so you might be careful there. Mine might be a first generation too, as it looks like they updated them and the new specs seem better than mine. One more little cut, but you'll likely need a bigger fuel pump too for that power on E85. I've run the true Bosch 044 pump and the AEM 044 knock off, and would say they are equally good. Of course, they draw more current, so running higher capacity wires on a separate relay is wise too...
Thanks Tom. I bought the ID 1300’s. The pump is the new Bosch 200 which replaced the 044. It flows 15% more and weighs less. I also have a AFPRand will probably run it with 450ish WHP as that is plenty for the street!

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Bergerac
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Just had a look at my logs for my ID1050s on the stock S2 motor (98 RON), they were maxing out at 26% at Im guessing 180-200hp. Triple that for the 968 turbo and Im going to be sitting just under 80% which is probably my upper limit. With 40% more fuel required for E85 Id say you'd be right on the limit.

#5

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Fejjj951 wrote: Tue Apr 01, 2025 4:56 pm
Tom wrote: Tue Apr 01, 2025 10:29 am
Fejjj951 wrote: Mon Mar 31, 2025 7:20 pm We are currently doing a 3L/2.7 Turbo build with lots of goodies💰. This motor will likely be pushing 500 WHP on E85. A few people I have spoken with have suggested the Injector Dynamics 1300’s. They are 1k for 4. As anyone who has ever done 1 of these builds knows, it is “Death by a thousand cuts” and I am bleeding profusely. Any suggestions for other quality injectors would be greatly appreciated.
I used the ID1300 on my 3L. Not sure they flow their full rated capacity. I did get 500rwhp on a dynojet while running 103 octane gasoline, and am not entirely sure they had the headroom with a 3Bar FPR to match that on E85, so you might be careful there. Mine might be a first generation too, as it looks like they updated them and the new specs seem better than mine. One more little cut, but you'll likely need a bigger fuel pump too for that power on E85. I've run the true Bosch 044 pump and the AEM 044 knock off, and would say they are equally good. Of course, they draw more current, so running higher capacity wires on a separate relay is wise too...
Thanks Tom. I bought the ID 1300’s. The pump is the new Bosch 200 which replaced the 044. It flows 15% more and weighs less. I also have a AFPRand will probably run it with 450ish WHP as that is plenty for the street!
I've been out of the loop and wasn't aware of the Bosch 200. It has some big shoes to fill. Is it E85 approved?

#6

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Fejjj951
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Tom wrote: Wed Apr 02, 2025 9:39 pm
Fejjj951 wrote: Tue Apr 01, 2025 4:56 pm
Tom wrote: Tue Apr 01, 2025 10:29 am

I used the ID1300 on my 3L. Not sure they flow their full rated capacity. I did get 500rwhp on a dynojet while running 103 octane gasoline, and am not entirely sure they had the headroom with a 3Bar FPR to match that on E85, so you might be careful there. Mine might be a first generation too, as it looks like they updated them and the new specs seem better than mine. One more little cut, but you'll likely need a bigger fuel pump too for that power on E85. I've run the true Bosch 044 pump and the AEM 044 knock off, and would say they are equally good. Of course, they draw more current, so running higher capacity wires on a separate relay is wise too...
Thanks Tom. I bought the ID 1300’s. The pump is the new Bosch 200 which replaced the 044. It flows 15% more and weighs less. I also have a AFPRand will probably run it with 450ish WHP as that is plenty for the street!
I've been out of the loop and wasn't aware of the Bosch 200. It has some big shoes to fill. Is it E85 approved?
Yes

#7

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Fejjj951
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This is a 100% Genuine Bosch Motorsports 0580464200 (a direct fit replacement for the superseded -044, 0580254044 or Bosch 61944 pump), as used by American, Japanese, European + Australian performance/ tuner shops, JGTC cars, touring cars, almost all WRC cars, and many more. This fuel pump flows about 15% more and weighs about 15% less than the old -044 pump. This fuel pump is also made to handle Ethanol (E85) better unlike the old -044 pump. Capable of providing 300LPH free flow and 200LPH at 5 bar (72.5 psi) for up to 685HP. In comparison, the Walbro GSS341 255LPH "high pressure" fuel pump can support 390HP. Bosch 044s are inline fuel pumps. Although they may be installed in-tank, some custom fabrication will usually be required. Bosch turbine fuel pumps offer many advantages when compared to older roller-cell and inner-gear pump designs. Not only do these pumps offer near-silent operation and improved drivability, the core components of the turbine design significantly reduce wear and deliver a longer service life. That an important consideration when choosing a performance fuel pump. Application-specific, illustrated step-by-step instructions are included.
Specifications:
300LPH free flow and 200LPH at 5 bar (72.5 psi) for up to 685HP on gasoline or ~550hp on E85
Fully compatible with gasoline, E85, RE85 and diesel fuel
Near silent operation
Improved drivability
Replacement for Bosch fuel pump 0580254044
Max flow >220 - 270 l/h @ 5 Bar / 13 V (gasoline)
Up to 7 Bar pressure
Input M18X1.5 inner thread, internal 130 micron filter (not changeable)
Input without adapter: M14X1.5 inner thread
Pressure side M12X1.5, outer thread with check valve
Body diameter 60 mm, 52 mm without plastic fitting
Electrical connectors: - M5 / + M4
Current consumption 17 A @ 5 bar / 13 V, +22 °C
Internal overpressure valve 8 - 10 Bar

#8

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gruhsy
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Just beware of counterfeit pumps.

That is a quote directly from Bosch.

Amazon not the place to buy.

#9

michaelmount123
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How to spot a fake 044 pump:

#10

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