as title, looking to get a set of injectors that will be enough for the gt30r turbo. was thinking about 800cc. how much hp can 800cc handle?

 

https://honda-tech.com/zero...age=9 scroll down a bit

 

well I got a 35r and at 12.5 psi im at 81% DC on my 1000cc injectors I am tuned to 10.8:1 so yeah id say 1000cc's if your looking to make the most power from that turbo

 

1000cc imo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22 civic &raquo;</TD></TR><TR><TD CLASS="quote">1000cc imo</TD></TR></TABLE>

yeah 1000cc's should be plenty!

 

it actually comes down to the hp goal not necessarilly the turbo size.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by N20civicB18 &raquo;</TD></TR><TR><TD CLASS="quote">well I got a 35r and at 12.5 psi im at 81% DC on my 1000cc injectors I am tuned to 10.8:1 </TD></TR></TABLE>

damn! what kind of fuel pressure are you running at that DC?

On my 35R @ 13psi I'm at 55% DC. This is with a rail pressure of ~45psi with the vacuum line removed.

 

10.8:1 is pretty rich man. Try 11.8:1...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostedcivicsir &raquo;</TD></TR><TR><TD CLASS="quote">it actually comes down to the hp goal not necessarilly the turbo size.</TD></TR></TABLE>

that's true. I was really just looking at the power potential of that turbo and figuring that 1000cc's would be fine..., but if your not looking to max out that turbo smaller can be used...

 

here's the formula for finding the proper injector size pulled from the RC website:

HP X .60 (B.S.F.C) / Number of injectors X .80 (duty cycle), then convert to cc/min by mutiplying the total by 10.5...

so with a GT30R your max HP is somewhere around 500. So lets say 515hp... to find out what size injectors will be at 80% duty cycle at 515hp you would factor this:

515 X .60 / 3.2 = 96.56 X 10.5 = 1013cc/min

So you would need 1013cc injectors

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeToAHatch &raquo;</TD></TR><TR><TD CLASS="quote">here's the formula for finding the proper injector size pulled from the RC website:

HP X .60 (B.S.F.C) / Number of injectors X .80 (duty cycle), then convert to cc/min by mutiplying the total by 10.5...

so with a GT30R your max HP is somewhere around 500. So lets say 515hp... to find out what size injectors will be at 80% duty cycle at 515hp you would factor this:

515 X .60 / 3.2 = 96.56 X 10.5 = 1013cc/min

So you would need 1013cc injectors </TD></TR></TABLE>

The BSFC of boosted honda motors are lower than .60

The BSFC on my motor is .49

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TrueNorthStar &raquo;</TD></TR><TR><TD CLASS="quote">

The BSFC of boosted honda motors are lower than .60

The BSFC on my motor is .49 </TD></TR></TABLE>

That's good to know. The general formula RC uses states that N/A motors BSFC is .50 while boosted engines are .60 or higher. Lets try with the BSFC on your engine.

515 X .49 / 3.2 = 78.85 X 10.5 = 828cc

Maybe someone could explain how to determine the brake specific fuel consumption (BSFC)

 

I just use the calculator on RC's website

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TrueNorthStar &raquo;</TD></TR><TR><TD CLASS="quote">I just use the calculator on RC's website </TD></TR></TABLE>

Quoted from the RC website:
"* Brake specific should be .45 to .50 for naturally aspirated engines,
.55 TO .60 for supercharged engines,
and .60 to .65 for turbocharged engines."

http://www.rceng.com/technical.htm

 

use around a bsfc of .50 or so with these engines...