stock injectors on a wrx (how many cc's)
02-04-2003, 12:14 PM
#1
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Car Info: wrx tooooo much invested
stock injectors on a wrx (how many cc's)
I'm doing some major work on my Wrex and need to know how many cc's my stock injectors are, i'm going to 550's but i dont know it thats enough should i go 780 or 850?
02-04-2003, 02:18 PM
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I'm looking on making anywhere from 350 to 450 to the wheels, i already dyno'd the car at 314.5 hp to the wheels i'm looking for more power, although my machanic told me that knowing the stock injector size can help on making much more accurate Hp.
02-05-2003, 09:44 AM
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So your 100% sure that the stock injectors are 420cc? Only b/c your the first to tell me any # on the cc size on the stock injectors. And thanks by the way
02-13-2003, 09:09 PM
#9
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DF,
You are correct stock injectors will not go past 270 whp, well from my experience. I have tuned to many cars and noone makes it past that, though all stock fuel pressure and stock fuel pumps.
---------------
Johndoe,
Also the stock fuel pump is a big problem at around 300 whp, as it can nto push anymore fuel and runs out. So you will also need to upgrade the fuel pump to at least 255lph if not bigger.
Another thing the fuel lines that run from the gas tank to the engine, are not big enough to run fuel through at around 350whp, so you will need to upgrade the fuel lines also all the way from the gas tank.
As for 350-450whp 650cc injectors will cover you for that amount, you can always raise the fuel pressure a little more, but that shoudl work fine. Just make sure it is well tuned and you have a big fuel pump, like 315lph.
You are correct stock injectors will not go past 270 whp, well from my experience. I have tuned to many cars and noone makes it past that, though all stock fuel pressure and stock fuel pumps.
---------------
Johndoe,
Also the stock fuel pump is a big problem at around 300 whp, as it can nto push anymore fuel and runs out. So you will also need to upgrade the fuel pump to at least 255lph if not bigger.
Another thing the fuel lines that run from the gas tank to the engine, are not big enough to run fuel through at around 350whp, so you will need to upgrade the fuel lines also all the way from the gas tank.
As for 350-450whp 650cc injectors will cover you for that amount, you can always raise the fuel pressure a little more, but that shoudl work fine. Just make sure it is well tuned and you have a big fuel pump, like 315lph.
10-06-2018, 12:55 PM
#11
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Car Info: 2018 subaru wrx
Stock injectors
this ones from a long time ago but I figured I’d jump in anyway. I drive a 2018 Subaru WRX with a number of upgrades. So far I’m at 326whp and 314lbs of torque. This is on e85 and a small mixture of 93 pump. Now my questions the same, do I need to upgrade my injectors? I already upgraded the fuel pump but I feel like when I get into a strong pull the car kinda hesitates a little bit. Is this the injectors maxing our?
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