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Old 10-17-2010, 04:22 PM   #1
TurboQueef
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Join Date: May 2005
Location: Otsego, MI
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2005 STI
Silver/Black,11.44@123.60

Default DW 850's to ID1000's: My results (not much gain)

Good day,

You may want to consider my results before jumping into an upgrade from Deatschwerks 850's to ID1000's

The bottom line: My ID1000's running at stock fuel pressure (43.5) flow only slightly more fuel than my DW 850's. My target AFR was 11.2

Considering that I have an 05 STi, I had to install the top feed rail conversion and new fuel lines & regulator. I went with Aeromotive braided line and FPR.

All things considered, I am happy with this set up. With the upgraded fuel system, I can increase the pressure to achieve more flow from the ID1000's if needed.

Another point to consider... The data above was at 21psi... when I increased the boost, I could not maintain target AFR.. I ended up installing an in line Bosch 044 pump. Today, I run 24psi and maintain IDC's of 100% at stock fuel pressure on the ID1000's (414/346 AWHP)

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Last edited by TurboQueef; 10-17-2010 at 05:11 PM.
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Old 10-17-2010, 04:55 PM   #2
kellygnsd
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LINK G4 hybrid STi

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You shouldn't compare maf voltages and IDC, fueling is based off of engine load and RPM and every point on your ID1000 table is at a higher calculated engine load than the other table. MAF voltage alone is not what determines fueling.
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Old 10-17-2010, 05:03 PM   #3
TurboQueef
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Quote:
Originally Posted by kellygnsd View Post
You shouldn't compare maf voltages and IDC, fueling is based off of engine load and RPM and every point on your ID1000 table is at a higher calculated engine load than the other table. MAF voltage alone is not what determines fueling.
As you state, there are many factors to consider but in the end... the IDC's, target vs actual AFR tell the story I believe. My target AFR was 11.2 BTW

Last edited by TurboQueef; 10-17-2010 at 05:12 PM.
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Old 10-20-2010, 07:30 PM   #4
Innovative Tuning
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and 06 STI daily

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I think you're missing kelly's point. You need to compare IDCs to achieve a given AFR at the same RPM, MAF Voltage, and calculated load. Otherwise it's not an accurate comparison. Based on what I can see of your logs it looks like 98.25% on the 850s would correspond to around 90 ish % on the ID1000s at 7200 RPM (if the MAF voltage on the ID1000 log was as low as the 850cc pull).
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Old 10-20-2010, 07:56 PM   #5
TurboQueef
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Quote:
Originally Posted by Innovative Tuning View Post
I think you're missing kelly's point. You need to compare IDCs to achieve a given AFR at the same RPM, MAF Voltage, and calculated load. Otherwise it's not an accurate comparison. Based on what I can see of your logs it looks like 98.25% on the 850s would correspond to around 90 ish % on the ID1000s at 7200 RPM (if the MAF voltage on the ID1000 log was as low as the 850cc pull).
Ok.. I understand your points now... I just tried to find some data that perfectly matches up those datapoints... cant find any at the moment.

Looks like you are into tuning... I am curious what results you have realized with these injectors? Do they flow 1000cc?
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Old 10-20-2010, 08:36 PM   #6
Innovative Tuning
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and 06 STI daily

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Yup it's tough with the slow logging rate of the stock ECU. I think you'll find you got the increase in flow you'd expect when going from 850s to 1000s if you can match up more even data points. With the setup you're describing I doubt you're dropping fuel pressure, but it's important to make sure fuel pressure is the same up top when comparing results.

To be honest I've only used the ID1000's on an Audi 5 cylinder with a GT42R turbo. We've used the ID2000's on all our recent bigger builds for headroom with E85 fuel. The 2200s tune so easily we just use them on daily drivers and race cars alike.

I'd bump your base pressure to 55 psi and retune the car to give yourself some headroom with the 1000's.

Good luck!
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Old 10-20-2010, 08:46 PM   #7
TurboQueef
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Quote:
Originally Posted by Innovative Tuning View Post
Yup it's tough with the slow logging rate of the stock ECU. I think you'll find you got the increase in flow you'd expect when going from 850s to 1000s if you can match up more even data points. With the setup you're describing I doubt you're dropping fuel pressure, but it's important to make sure fuel pressure is the same up top when comparing results.

To be honest I've only used the ID1000's on an Audi 5 cylinder with a GT42R turbo. We've used the ID2000's on all our recent bigger builds for headroom with E85 fuel. The 2200s tune so easily we just use them on daily drivers and race cars alike.

I'd bump your base pressure to 55 psi and retune the car to give yourself some headroom with the 1000's.

Good luck!
Thanks... good info....

Jeff B
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