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bumping an old thread, but wanted to share my experience tuning these tables on E85. You will need to come up with your own numbers, OP's guide is a good start but every car is different. Since these settings are in straight pulsewidth values, they are not affected by injector scalar value changes. 1ms of pulsewidth one a 1000cc injector is nearly twice the fuel as a 550cc injector.

Also be very careful about adding too much fuel. Knew a guy who had ID2000s and ended up washing down his cylinders and had poor ring seal and ended up losing compression. Even if you spend a lot of time tuning these tables, E85 cold starts are pretty tough when it gets down below 40-45F. REALLY tough below freezing.
 

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bumping an old thread, but wanted to share my experience tuning these tables on E85. You will need to come up with your own numbers, OP's guide is a good start but every car is different. Since these settings are in straight pulsewidth values, they are not affected by injector scalar value changes. 1ms of pulsewidth one a 1000cc injector is nearly twice the fuel as a 550cc injector.

Also be very careful about adding too much fuel. Knew a guy who had ID2000s and ended up washing down his cylinders and had poor ring seal and ended up losing compression. Even if you spend a lot of time tuning these tables, E85 cold starts are pretty tough when it gets down below 40-45F. REALLY tough below freezing.
If you really want to know how to get your cold startups successful using E85 visit this thread I made. It has a bunch of seasoned tuners (most from Norway, where it gets really cold) giving you the simple solution to all of this.

I did not realize how simple it is to fix and have been fighting with it for 3 years.

This method outlined in this thread here on IWSTI DOES NOT WORK properly.

Read here, READ THE ENTIRE THREAD!! RomRaider • View topic - E85 (not e70) Cold startup @ 16 degrees FIXED!! LOOK!!!
 

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anyone happen to have an E85 tune for the hawk eye 2.5 WRX on the stock TD04? hell even an E85 tune for the hawk eye STi on stock turbo that i could compare to a stock hawk STi rom to get an idea of the sort of changes id be looking to make.

really wanting to jump on the E85 bandwagon even if only for a sneaky boost in power for drag racing, etc and then reverting back to my current tune.
 

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anyone happen to have an E85 tune for the hawk eye 2.5 WRX on the stock TD04? hell even an E85 tune for the hawk eye STi on stock turbo that i could compare to a stock hawk STi rom to get an idea of the sort of changes id be looking to make.

really wanting to jump on the E85 bandwagon even if only for a sneaky boost in power for drag racing, etc and then reverting back to my current tune.
It's not that difficult...

You need ~30% more fuel off the bat and cold start will require more fuel (ms). Address all the associated tables.
 

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yea im not too worried about that aspect of an E85 tune. its the ignition timing, AVCS and boost/WGDC im somewhat lost on. dont know if id want to leave AVCS as is and just up the boost or up the boost and up the ignition timing or up all 3, etc, etc.

only been tuning my WRX for maybe 2 weeks collectively. before that my only experience in opensource tuning was with 20+ year old BMW's so im on a monumental learning curve.. also i cant tune in real time on the WRX like i can on the old BMW's with the aid of an eprom emulator. hoping someone has something i could ideally load up and tweak.

im already managing to run about 1.3 bar peak and about 0.9bar after boost drops off on UK 95 octane with a tune i sort of mashed together from a stage 1 and stage 2 i pillaged from the WRX base maps section on romraider. so far so good with that and i am tweaking/learning but E85 would be a massive jump without a base to work from.

would the stock injectors + a walbro 255 suffice for fuelling on E85? the hawk eye WRX has the same injectors as the hawk eye STi. also would i need to replace my fuel filter before running E85 or anything else along those lines? lastly could i switch back and forth between E85 and my current tune or would the fuel system/filter/lines potentially give me problems?
 

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yea im not too worried about that aspect of an E85 tune. its the ignition timing, AVCS and boost/WGDC im somewhat lost on. dont know if id want to leave AVCS as is and just up the boost or up the boost and up the ignition timing or up all 3, etc, etc.

only been tuning my WRX for maybe 2 weeks collectively. before that my only experience in opensource tuning was with 20+ year old BMW's so im on a monumental learning curve.. also i cant tune in real time on the WRX like i can on the old BMW's with the aid of an eprom emulator. hoping someone has something i could ideally load up and tweak.

im already managing to run about 1.3 bar peak and about 0.9bar after boost drops off on UK 95 octane with a tune i sort of mashed together from a stage 1 and stage 2 i pillaged from the WRX base maps section on romraider. so far so good with that and i am tweaking/learning but E85 would be a massive jump without a base to work from.

would the stock injectors + a walbro 255 suffice for fuelling on E85? the hawk eye WRX has the same injectors as the hawk eye STi. also would i need to replace my fuel filter before running E85 or anything else along those lines? lastly could i switch back and forth between E85 and my current tune or would the fuel system/filter/lines potentially give me problems?
Stock injectors? Nope. I think you need to reread this ENTIRE thread or start lurking romraider more. I learned how to tune on my own with very few questions since the information is out there you just have to search for it. No one here will spoon feed you. :D
 

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not looking spoon fed but tbh someone is bound to have done E85 on the hawk eye WRX already..

also every newcomer to OS tuning on these subarus is being spoon fed in all reality because theres guides and stuff galore. on the old BMW's i have been tuning for years there is far, far less and those who know dont share much. here you simply download romraider or ecuflash and download the defs which are all done for you already and maps all correctly labelled and explained, etc. you try reading an ECU and then having to use some half figured out def with wrong map axis values when your a newbie because people dont know the conversion, tuning fuel maps in raw values because people dont know the conversion and then eventually getting up to a stage where you can read the code and identify and then figure out maps that were previously unknown and then get to a point where you know enough to make your own defs correctly with what conversions are out there or that you have managed to figure out.. thats not being spoon fed..

i dont need to read about E85. i looked into it years ago for my old BMW just because i could have tuned for it but there was no point as it was N/A at the time.

im asking about the stock injectors because they are the same as whats in the STi and people have run them to over 300bhp (250whp ish or more). considering 280bhp or so is possible on the TD04 and E85 can yield 30-40hp the numbers fit right in where people have gone on normal fuel on the stock injectors im not 100% sure but i swear i remember reading up on a couple things where people have seen 350-400 on the stock injectors (and larger turbo) on normal fuel. i know E85 requires about 30% more fuel but what im wanting to know is can the stock injectors manage that or not. obviously fuel pump ill need to be upgraded but i dont know if stock injectors could possibly stretch that far? what makes me wonder is that i knot know how much more normal fuel you would need to be injecting for say 400bhp but lets say its 25% for fun and giggles (probably not but i dont know) then by rights 310bhp or there abouts should be do-able on the same injectors with E85.. get where im coming from? obviously they wouldnt be ideal but im wondering if they would suffice atleast enough to get running on E85 and make more power than i can on normal fuel.
 

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You can do 300+whp on stock injectors... on gas and a DynoJet. Below is the first Subaru tune I did years ago. It is on stock injectors and a VF39 hitting ~17.5 PSI on the dyno. We later ran it at 19 PSI before swapping out to ID1000's and E85 and then stripping 3rd gear.


I've done quite a few Hawkeye WRX's and STi's. Here is one of my favorites (a good friend of mine) that is currently undergoing a turbo swap to a Dom 2.5XT-R.

22.5 PSI and moderate timing.

20-21 PSI with what I consider low timing for E85.

Same car against my old SHO.


Can you run the stock injectors on a TD04, sure... But you'll probably find yourself injector limited fairly quickly. On my STi, I have ID1000's, Walbro 450, and my base pressure set at 50 PSI on a 20G @ 23PSI and my road dyno showed 430 whp. My IDC's are in the mid 80's, however, Subaru does not count 100% as static, so in those terms, I am much lower than the mid 80's.

I do have stock STi injector on my S2000 running E85. I think I am in the 60's for IDC, IIRC.
 

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You will be lucky if you can run 17 psi on E85 with the stock injectors. You are going to lean them out at WOT. If you use unleaded fuel you may be able to run upwards of 20 psi on the stock injectors but I do not recommend it.

All of the maps you are looking for are on romraider.
 

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well at the minute im running UK 95 octane and my boost gauge reckons im just a hair under 1.4 bar at peak boost. in my logs though it looks lower (peaking at 18psi according to logs, unless im not logging the right boost parameter).

i did a virtual dyno off of one log on the flattest road i could find and according to that with smoothing at 1 and using the "virtual dyno" dyno setting which gives numbers between dynojet and mustang dyno its saying 300lbft and 250whp.

mind taking a peek at some of the logs to see if you think i can add more boost/WGDC or ignition timing anywhere as going drag racing on sunday.. its the logs and last rom i posted towards the bottom.

RomRaider • View topic - MY06 EDM WRX - Stage 2(ish) - TD04, SRI, CBE - Help?
 
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