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Discussion Starter #1
Looking to do an E85 set-up and want to get all my ducks in a row here. What are some proven injectors and where can I get them ? Im guessing 850s would do the trick, no ? No turbo upgrade in the near future either.

Any direction would be helpful. Thanks.

2009 WRX

---Joe---
 

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Use injector Dynamics. They're apparently a bosch company. I'm not pleased with my Deatschwerks.

Are you using the stock turbo? Do you plan on going any larger?
 

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I'm currently having problems with my Deatschwerks 1300s :(.



I'd probably go with ID 1000s if I didn't need at least 1200cc for my setup.. and hadn't already purchased DW 1300s..
 

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Well.. not exactly 1200cc, but more than 1000cc. And the ID 1000s don't flow 1000cc at stock pressure. MAP BB 20g.. 49lb/min
 

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I have 1000's and my DW's are more than fine on the 1.5XTR (which is a 49lb/min with a 10cm turbine housing)
 

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Yeah, my turbo is basically identical to yours. Just a little cheaper, with an 8cm housing (and I've done practically every mod to get the last little bit of power without stressing anything more).. I got the 1300s because they were the same price as 1000s (and when I called they knocked off another $150). Plus I was thinking I might upgrade to a Dom 3XTR if I get tired of this.

I tend to err on the overboard/protective side.. the last thing I bought for my car was a Walbro 400lph fuel pump because I somehow convinced myself that the 255 wasn't going to be good enough.


What are your IDCs looking like?
 

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I'll let you know tomorrow. It's freezing cold outside, and it should be stressing them to the max on a 20 degree day with E85 :D

How many mm is the MAP compressor and turbine?
 

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I was just trying to search on it.. and there is almost no info public on that thing.

That's their first turbo, isn't it?
 

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They've been making similar Evo turbos for years.. this is just their first Subaru stock location specific turbo.
 

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On my base map for 93 octane it was spooling at the same time my VF22 would spool, so I can't wait to see how it does on my new set up with e85. :thumbup:
 

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We'll have to compare dynos. And actually... I had a rough exhaust leak, so I should be spooling sooner. So I'll go get another dyno so we can do some comparison.

Are you going all out? or limiting?
 

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Haha.. sorry to the OP for thread jacking.



I'm going all out on e85. Our cars should be making similar numbers (corrected for altitude & temp). I dunno how the STi cams compare to the 2.5L WRX cams.. and I don't have AVCS, but my heads are opened up a little. In theory mine should spool a little later and make a little more peak power, but it's hard to say. And my gear ratios are different..
 

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Discussion Starter #16
Say Whaaaaaaat !!!?? OK, so how about some advice for me ! HaHa !

Gonna run a stock turbo, not going bigger any time soon.

---Joe---
 

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850cc should be ok. 30% of 850 is 595 which is 30 more cc than your stock injectors. your stock injectors can almost max out your stock turbo on 93 (21psi with a 15.5 psi taper at 94% IDC from my old set up). i doubt you'll max out everything so 850 should be fine. ID 1000's you can go to next but they have been showing around 900cc or so, so there really not an upgrade. they do idle and perform awesome i hear!
 

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Say Whaaaaaaat !!!?? OK, so how about some advice for me ! HaHa !

Gonna run a stock turbo, not going bigger any time soon.

---Joe---
Sorry... We got carried away.

Syno... you did your math wrong.

565cc's x .85 (because you want a 85% IDC or less) = 480.25. X 1.3 (130% fuel usage for E85) = 624.325cc's. So if boost isn't increased, you need injectors that can handle 625cc's. 85% of 750cc's is 637.5cc's. Which is entirely too close to that 625cc's, and wouldn't be sufficient if boost is increased, and more injector is needed. So 850cc's at 85% = 722.5cc's. That would be a 100cc margin of safety.

So the correct answer would be 750 or 850's. 850s would be safer, but 750s are possible. Considering costs being so similar, 850s would be my choice.
 

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Sorry... We got carried away.

Syno... you did your math wrong.

565cc's x .85 (because you want a 85% IDC or less) = 480.25. X 1.3 (130% fuel usage for E85) = 624.325cc's. So if boost isn't increased, you need injectors that can handle 625cc's. 85% of 750cc's is 637.5cc's. Which is entirely too close to that 625cc's, and wouldn't be sufficient if boost is increased, and more injector is needed. So 850cc's at 85% = 722.5cc's. That would be a 100cc margin of safety.

So the correct answer would be 750 or 850's. 850s would be safer, but 750s are possible. Considering costs being so similar, 850s would be my choice.

no the math is correct, its just what you deem safe % wise, margin of error, increased boost, my parts vs others parts etc etc etc. i can run 21psi with a 15.5psi taper at only 94% IDC on my parts vs someone else that runs 104% IDC with only a stage 2 tune. ive seen it done before. its in your tune also. my 11 stage 2 torqued performance tune with only a TBE at 13.6psi redline is also running 94% IDC. E85 and 750cc i promise wont work. not unless you run low boost which will be pointless or you buy every bolt on possible.
 
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