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Old 11-17-2015, 01:07 AM   #1
ThehatedRS
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Default Sti pink injectors in an 05' rs?

Been thinking about upgrading injectors. Wanna squeeze some more power out of the bad boy. Was thinking STI pinks but didn't know if I could go better or even do it in General with the pinks. How much power could I squeeze also?
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Old 11-17-2015, 01:11 AM   #2
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What's your goal here? Just dump more fuel in without adding air?
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Old 11-17-2015, 01:11 AM   #3
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Quote:
Originally Posted by CosmoTheCat View Post
What's your goal here? Just dump more fuel in without adding air?
Goal: more power
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Old 11-17-2015, 01:41 AM   #4
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Ok how are you going to get there? What's your plan? Turbo? Supercharger? Camshafts? Nitrous?

Fuel has to be added in the correct mixture with air in order to burn - simply putting higher flowing injectors in won't do anything but add more fuel and throw off your AFR, causing increased fuel consumption and probably decreased power.

How much more power do you want? 5-10hp? That's doable. More if you get a set of cams. Or scrap your motor and do a turbo swap. Non-turbo motors have a finite amount of power that you can make. To make more, you'll need to increase displacement (a lot), increase compression ratio, or increase the efficiency (cams, bolt ons, etc).
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Old 11-17-2015, 11:29 AM   #5
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Originally Posted by CosmoTheCat View Post
Ok how are you going to get there? What's your plan? Turbo? Supercharger? Camshafts? Nitrous?

Fuel has to be added in the correct mixture with air in order to burn - simply putting higher flowing injectors in won't do anything but add more fuel and throw off your AFR, causing increased fuel consumption and probably decreased power.

How much more power do you want? 5-10hp? That's doable. More if you get a set of cams. Or scrap your motor and do a turbo swap. Non-turbo motors have a finite amount of power that you can make. To make more, you'll need to increase displacement (a lot), increase compression ratio, or increase the efficiency (cams, bolt ons, etc).
I'm just trying to do a little something before the h6 franken-swap I have planned. See what I can do to the current motor while being a little less money happy seeing as the motor is 1600
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Old 11-17-2015, 11:48 AM   #6
Patrick Olsen
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That still doesn't answer Cosmo's question - what else are you going to do besides install bigger injectors? As he said, installing bigger injectors without any other changes isn't going to accomplish anything useful, and will actually be counter-productive.
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Old 11-17-2015, 01:02 PM   #7
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Quote:
Originally Posted by ThehatedRS View Post
I'm just trying to do a little something before the h6 franken-swap I have planned. See what I can do to the current motor while being a little less money happy seeing as the motor is 1600
Quote:
Originally Posted by Patrick Olsen View Post
That still doesn't answer Cosmo's question - what else are you going to do besides install bigger injectors? As he said, installing bigger injectors without any other changes isn't going to accomplish anything useful, and will actually be counter-productive.
He clearly doesn't understand the core concept of what he's attempting to do. Let him touch the hot stove, because he doesn't seem to want to listen.
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Old 11-17-2015, 01:19 PM   #8
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He clearly doesn't understand the core concept of what he's attempting to do. Let him touch the hot stove, because he doesn't seem to want to listen.
I do understand. No need to be asshats guys. I just wanna know if I should do it. To the current motor UNTIL I do the swap. It's kind of changing into a different topic at this point I just wanna know inexpensive ways to squeeze more power out of the stock motor. Already have an exhaust and intake.
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Old 11-17-2015, 01:19 PM   #9
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Didn't know if injectors were a good idea. That was my question
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Old 11-17-2015, 01:22 PM   #10
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STi injectors in a 2005 Impreza RS?
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Old 11-17-2015, 02:03 PM   #11
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STi injectors in a 2005 Impreza RS?
Yes that's what my thread is about
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Old 11-17-2015, 02:20 PM   #12
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Quote:
Originally Posted by wrxlaunch View Post
STi injectors in a 2005 Impreza RS?
It would appear that he wants to install 550cc sidefeeds, so, yes.


Quote:
Originally Posted by ThehatedRS View Post
I do understand. No need to be asshats guys. I just wanna know if I should do it. To the current motor UNTIL I do the swap. It's kind of changing into a different topic at this point I just wanna know inexpensive ways to squeeze more power out of the stock motor. Already have an exhaust and intake.
There really aren't any ways you can get more power out of that motor -- they come stock about as far as they're really gonna go.


Quote:
Originally Posted by ThehatedRS View Post
Didn't know if injectors were a good idea. That was my question
You say you understand, you demonstrate a very rudimentary grasp of the concept, however, you don't fully get it.

Your ECU controls the air and fuel mixtures based on static variables per RPM, load, etc, and then use other inputs, like 02 and MAF sensors to determine the rest. There is a limit to its scaling of these figures, though, and, you're already at the max (and, in some areas, probably lean as a result of your "intake" and exhaust mods) threshold for those tables. But now you're wanting to throw some larger injectors in there and tip the OTHER side of the scale in excess, which will result in a net loss of power, as well as mileage.

Here, this should give you a definitive answer:

http://www.rs25.com/forums/f5/t11290...-question.html


CN: Newp.
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Old 11-17-2015, 03:34 PM   #13
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Quote:
Originally Posted by ThehatedRS View Post
I just wanna know inexpensive ways to squeeze more power out of the stock motor. Already have an exhaust and intake.
You are in NH so try to get a hold of Matt Miner and get your car tuned (05+ N/A can be tuned). That will be your cheapest option and honestly it was the best money I ever spent with my car. You might be able to pick his brain a little about the h6 swap.

As far as the injectors are concerned, MrTris put it as clearly as possible. A general rule of thumb, running leaner will create more power but with additional heat. With bigger injectors you will be running richer, thus reducing power output. The stock injectors on an N/A car can push more than enough fuel unless you add some kind of forced induction, this is why Cosmo was asking about your plans. We need to know if you were planning on running a forced induction setup or not in order to give your the best advice.

Either way, reach out to Matt. He will be able to let your car get the most out of the mods you already have.
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Old 11-17-2015, 05:09 PM   #14
ThehatedRS
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Quote:
Originally Posted by lpxltt View Post
You are in NH so try to get a hold of Matt Miner and get your car tuned (05+ N/A can be tuned). That will be your cheapest option and honestly it was the best money I ever spent with my car. You might be able to pick his brain a little about the h6 swap.

As far as the injectors are concerned, MrTris put it as clearly as possible. A general rule of thumb, running leaner will create more power but with additional heat. With bigger injectors you will be running richer, thus reducing power output. The stock injectors on an N/A car can push more than enough fuel unless you add some kind of forced induction, this is why Cosmo was asking about your plans. We need to know if you were planning on running a forced induction setup or not in order to give your the best advice.

Either way, reach out to Matt. He will be able to let your car get the most out of the mods you already have.
I know Matt personally. We kept in touch on Facebook and such. I'm not on Facebook anymore and have no way to contact subaru Jesus. Hahahaha
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Old 11-18-2015, 09:38 AM   #15
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mattminer dot com

Seriously, get that thing tuned. You will be much happier with the car.
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Old 11-18-2015, 11:55 AM   #16
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Originally Posted by lpxltt View Post
mattminer dot com

Seriously, get that thing tuned. You will be much happier with the car.
Ditto
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Old 11-18-2015, 04:08 PM   #17
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[quote=pacgas;43965667]Ditto[/QUOTE

I think I'll stop into granite state dyno tomorrow. See what they have to say. More local lmao
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