Injector size?!?

Discussion in 'Modifications And Maintenance' started by Dwight Ritenour, Aug 9, 2018.

  1. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
    Im sure this has been touched on before. What size injectors should I buy the achieve 300hp+ (How much would you spend?)

    The car dynoed 251/270 at 5300rpms

    Setup:
    16g (cheap)
    Grimmspeed uppipe
    Ebay downpipe
    Autospeed exhaust

    Any recommendations would be super help?
     
  2. tangledupinblu
    Offline

    tangledupinblu Event Coordinator Staff Member

    Likes Received:
    6,098
    Trophy Points:
    573
    93 octane or e85?
     
  3. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    Pump gas on a 16g? I think you're in the ball park for what to expect at 250whp. What dyno was this on?
     
    Aegis likes this.
  4. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
    Dang it, thought I covered all my specs. 91pump for right now? For a “reliable” 300+

    Found a pretty legit E85 setup for cheap

    https://www.ebay.com/i/113122032059...3%26rvr_ts%3D1b1fcc1b1650ac1fed251e2dfff142e9


    The numbers it puts out with stock injectors is great. The car is very responsive and im happy With the tune. The powerband is to short and some added fuel would help extend the boost curve? Or maybe its a crap turbo! Either way, whats a good injector size for 300Hp+ on a ej20?
     
  5. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
    Like what kinda CC’s are we talkin bro? What brands? Budget? Exotic?
     
  6. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    You're likely not going to hit 300hp+ on an EJ20 with a 16G on pump gas. 250-270 is pretty much the range for that turbo.
     
  7. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    You can make 300hp on 650cc+
     
  8. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    Just not on a 16G on pump gas.
     
  9. tangledupinblu
    Offline

    tangledupinblu Event Coordinator Staff Member

    Likes Received:
    6,098
    Trophy Points:
    573
    Need a bigger snail!
     
  10. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
    Lots of people hit 300+ on a blouch 16g or a equivalent snail.


    So 650-1000cc+ and a fuel pump, should get close to 300hp
     
  11. retreif
    Offline

    retreif Well-Known Member

    Likes Received:
    603
    Trophy Points:
    298
    I think a 16g on the 2.ol with e85 is right size for everyday driving. Any bigger and you are getting into lagsedanland and replacing the trans. Might have to anyway.
     
  12. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    What gas was he running it on. That's the part that isn't listed or mentioned anywhere in there.
     
  13. joebush44
    Offline

    joebush44 Well-Known Member

    Likes Received:
    1,046
    Trophy Points:
    248
    Two reasons you shouldn't buy this knockoff flex sensor kit...

    1) It isn't accurate. It's been tested and proven that it doesn't provide an accurate e-content reading compared to Cobb kit. This is extremely important when the ECU is making changes based on ethanol content on the fly, it has to be accurate.

    2) It won't work with your car, assuming you have a bugeye. Flex fuel (with Cobb Accessport) is only supported on 32bit ECUs (06-14 WRX and 04+ STi). 02-05 WRX have 16 bit ECUs. There are other flex fuel options for 16bit ECUs, like Carberry for example, but would require an open source tune.

    If you're going to upgrade injectors, I'd highly recommend going with Injector Dynamics 1050x injectors. Stay away from Deatschwerks or "modded stock" injectors.

    Upgrade to 1050x injectors, a higher flowing fuel pump (Walbro 255lph will suffice), and a pro tune for an e85 map and I think you'll be around your target of 300whp
     
  14. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
  15. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    He will want a larger intercooler of some sort.
     
  16. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    Also, I have seen the 02-04 stock airbox become a restriction at around 250HP on the dyno at RS. So, tack on a long-tube CAI as well for good measure.

    Also, a proper tune.
     
  17. pleiades
    Offline

    pleiades Well-Known Member

    Likes Received:
    553
    Trophy Points:
    178
    I have modded stock injectors in my bugeye...:(
    They seem to work fine for me but I'm sure they'll eventually be swapped out for something bigger (they flow at about 820cc). @Dwight Ritenour I do have a set of STI pinks (565cc) if you want to try those. They aren't as big as what other ones you're looking at but they'd be a lot cheaper.
     
  18. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
    Thanks for all the input guys!!!

    Really dont wanna run E85. A tank of gas doesn’t last long as is with that car. The car is the beater, mostly built with spare parts. So Lets call it a budget built.

    The E85 20g build is coming and I’ll need advice for injectors with that car very soon.

    That info about ecu’s being different (16-32) has me a little worried about switching my cars to e85 considering they are both bugeyes.

    I do have a set of pinks but they made less power on my last build only 246h/232t

    Soooo

    https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/263121501695

    Or

    https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/151856414775

    https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/321890005066
     
  19. Krazylegz1485
    Offline

    Krazylegz1485 Well-Known Member

    Likes Received:
    1,796
    Trophy Points:
    173
    Doesn't everybody always say the stock box is good for 400?

    Maybe that's what's holding my car back... /joke
     
  20. GrawvyRobber
    Offline

    GrawvyRobber Member

    Likes Received:
    81
    Trophy Points:
    38
    400 is a streeeeetch.

    I've only ever read that its good for up to 300. Mainly on Nabisco..
     
    Cotts612 and Krazylegz1485 like this.
  21. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
  22. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18
    I made a custom intake using the snorkel and bottom of the air box.

    The turbo inlet is stock.

    The intake pipe, maf mount and pod filter make lots of turbo sounds!!
     
  23. Fienix
    Offline

    Fienix Well-Known Member

    Likes Received:
    39
    Trophy Points:
    113
    If you have an E85 20g build coming, just do ID1050s and be done with it.
     
    readymix and tangledupinblu like this.
  24. tangledupinblu
    Offline

    tangledupinblu Event Coordinator Staff Member

    Likes Received:
    6,098
    Trophy Points:
    573
    ^This!
     
  25. joebush44
    Offline

    joebush44 Well-Known Member

    Likes Received:
    1,046
    Trophy Points:
    248
    It's not so much related to them having uneven flow across all 4 injectors (which is still very likely with modded injectors) as it is the pattern in which they flow. They tend to flow more like a cow pissing on a flat rock as opposed to a fine combustible mist.
     
    tangledupinblu likes this.
  26. pleiades
    Offline

    pleiades Well-Known Member

    Likes Received:
    553
    Trophy Points:
    178
    Yeah, that's what I've heard. I sent mine out to Witch Hunter so at least I know they flow the same, but I'm aware of the pattern being less than ideal for full clean combustion because of the diffuser plates being removed. I did it that way since I had the injectors already and just paid for the modification/testing and didn't have the cash to shell out on new ones. As I mentioned before, I'll likely end up getting different ones at some point but they're working well for the time being.
     
  27. tangledupinblu
    Offline

    tangledupinblu Event Coordinator Staff Member

    Likes Received:
    6,098
    Trophy Points:
    573
    Jesse at JMA has ID’s in stock when you’re ready!;)
     
    pleiades likes this.
  28. MrBlue
    Offline

    MrBlue Active Member

    Likes Received:
    353
    Trophy Points:
    73
    I have a set of brand new ID 1050x that I bought when I was going to go E85... with the commute to work being only 3 miles I changed my mind after another members problems with moisture. Anyways New, bought from JM pm me if you want to discuss price.
     
  29. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    People say a lot of things.

    I was standing next to Steve-O's car at RS Motors when the box became the bottle neck. I want to say they removed the air-filter altogether to get through the tuning session. Granted, this was maybe 12-13 years ago, so my memory of the exact situation could be fuzzy. But I vividly recall hearing the words "Well, we figured out the exact horsepower level where the stock airbox becomes a bottle neck. 250whp."
     
    Krazylegz1485 likes this.
  30. Mnelson
    Offline

    Mnelson Active Member

    Likes Received:
    241
    Trophy Points:
    53
    Makes me wonder how my aftermarket intake would play out on my car now.. I never liked how unnecessarily noisy it was so I swapped the stock box back on it.
     
  31. Krazylegz1485
    Offline

    Krazylegz1485 Well-Known Member

    Likes Received:
    1,796
    Trophy Points:
    173
    Mad gainz, bruh.
     
    Mnelson likes this.
  32. readymix
    Offline

    readymix ...Lest ye be trod upon... Staff Member

    Likes Received:
    2,542
    Trophy Points:
    473
    I can't really speak to anything outside the realm of the EJ20 as far as intake bottlenecking goes. You are probably fine.
     
  33. Dwight Ritenour
    Offline

    Dwight Ritenour Member

    Likes Received:
    3
    Trophy Points:
    18



    Lots of good info on injectors. I great it now!
     

Share This Page