The Truth - 440cc Injectors @ 8PSI? Maybe 9PSI?
The Truth - 440cc Injectors @ 8PSI? Maybe 9PSI?
What is the truth? Will 440cc injectors work at 8-9 psi??? Greddy kit uses 440cc injectors at 8.5PSI? In previous threads, I couldnt find an answer. Any one????[/b]
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From: PTuning
Re: The Truth - 440cc Injectors @ 8PSI? Maybe 9PSI?
Originally Posted by johnhawkins
What is the truth? Will 440cc injectors work at 8-9 psi??? Greddy kit uses 440cc injectors at 8.5PSI? In previous threads, I couldnt find an answer. Any one????[/b]
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Joined: Apr 2008
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From: Stafford, Virginia
The injectors are more than maxed out. Will it work? Yes, for a while. If you had 275 crank hp, .65bsfc, 51 psi fuel pressure and 100% duty cycle with 4 injectors it would require 434cc injectors. Usually you want to have about 80-85% duty cycle. So I would say on the Greddy kit the injectors are running a little over what they should.
Originally Posted by gompka
I would say yes, many people running the 9.5psi supercharger pulley with the stock 440 cc injectors.
1) s/c does not come with "stock 440 cc injectors". try 410
2) 9.5 s/c != 9.5 psi t/c
Originally Posted by jetlounge
Originally Posted by gompka
I would say yes, many people running the 9.5psi supercharger pulley with the stock 440 cc injectors.
1) s/c does not come with "stock 440 cc injectors". try 410
2) 9.5 s/c != 9.5 psi t/c
Why isn't 9.5psi s/c the same as 9.5psi t/c ? Pressure is pressure doesn't matter what it comes from, granted the s/c only hits that at redline i guess.
yup on a greddy kit it will be good around 9 psi but will be maxed out or close.. maybe if you run a fuel pump it will give you some more room.. but that depends on your target WOT afr too.. if you run a bigger turbo you sure would be maxed out before 9 psi..
on my 550 injectors I have 89% duty cycle at 9 psi with afr of 11.0.. no fuel pump w/ a gt30 turbo
on my 550 injectors I have 89% duty cycle at 9 psi with afr of 11.0.. no fuel pump w/ a gt30 turbo
Originally Posted by gompka
thought i saw a post that said s/c injectors were 440. My mistake.
http://blog.scionxtc.com/blogs/archi...n-xb-2008.aspx
and here on SL:
https://www.scionlife.com/forums/vie...ighlight=400cc
Originally Posted by gompka
Why isn't 9.5psi s/c the same as 9.5psi t/c ? Pressure is pressure doesn't matter what it comes from, granted the s/c only hits that at redline i guess.
Joined: Mar 2007
Posts: 16,638
From: Parsippany, NJ
Originally Posted by gompka
Originally Posted by jetlounge
Originally Posted by gompka
I would say yes, many people running the 9.5psi supercharger pulley with the stock 440 cc injectors.
1) s/c does not come with "stock 440 cc injectors". try 410
2) 9.5 s/c != 9.5 psi t/c
Why isn't 9.5psi s/c the same as 9.5psi t/c ? Pressure is pressure doesn't matter what it comes from, granted the s/c only hits that at redline i guess.
Joined: Mar 2007
Posts: 16,638
From: Parsippany, NJ
Ahh, didn't know they were even smaller. Lol, you tore that tool a new _______. 
.
And according to Dezod, stockers are 320cc, not 370cc like you stated in your thread.
Regardless, they're too small for a turbo.
.And according to Dezod, stockers are 320cc, not 370cc like you stated in your thread.
Regardless, they're too small for a turbo.
Thank you everyone for your response.
I am running 2.5" Catless Exhaust, 2.5" FMIC Piping, JDM Sport Cast Manifold, JDM Sport Hybrid Turbo AR.50 if this helps. I will prob just run it at 8psi to be safe on the 440cc injectors. Should still be a noticable jump from the 6psi I am currently at!
I am running 2.5" Catless Exhaust, 2.5" FMIC Piping, JDM Sport Cast Manifold, JDM Sport Hybrid Turbo AR.50 if this helps. I will prob just run it at 8psi to be safe on the 440cc injectors. Should still be a noticable jump from the 6psi I am currently at!
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From: TN
Originally Posted by gompka
Originally Posted by jetlounge
Originally Posted by gompka
I would say yes, many people running the 9.5psi supercharger pulley with the stock 440 cc injectors.
1) s/c does not come with "stock 440 cc injectors". try 410
2) 9.5 s/c != 9.5 psi t/c
Why isn't 9.5psi s/c the same as 9.5psi t/c ? Pressure is pressure doesn't matter what it comes from, granted the s/c only hits that at redline i guess.
No, 9.5 PSI s/C != 9.5 PSI t/C. They don't make no where near the same amount of power, require different amount of fuel delivery. 440cc injectors on a 9.5 PSI tC would be reaching/reached max. That's not the case with the S/C'er though.
And yeah, my understanding is 440cc injectors with the S/C'er stock as well, guess not.
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Originally Posted by CarbonXe
Ahh, didn't know they were even smaller. Lol, you tore that tool a new butthole. .
And according to Dezod, stockers are 320cc, not 370cc like you stated in your thread.
Regardless, they're too small for a turbo.
.And according to Dezod, stockers are 320cc, not 370cc like you stated in your thread.
Regardless, they're too small for a turbo.
My understanding is they are 370cc not 320.
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Joined: Dec 2004
Posts: 2,912
From: Gilbert, AZ
Originally Posted by rhythmnsmoke
Originally Posted by CarbonXe
Ahh, didn't know they were even smaller. Lol, you tore that tool a new butthole. .
And according to Dezod, stockers are 320cc, not 370cc like you stated in your thread.
Regardless, they're too small for a turbo.
.And according to Dezod, stockers are 320cc, not 370cc like you stated in your thread.
Regardless, they're too small for a turbo.
My understanding is they are 370cc not 320.
so a turbo at 9.5 psi vs. supercharger at 9.5psi flows more air even though they are at the same pressure? Err anyone care to explain why this is so? They work the same way hence I would assume 9.5psi is 9.5psi, but someone please enlighten me...
