if i put 440 injectors in my 03 si do i have to replace the fuel pume or will the stock one do the job for now?

 

you should and i say should very lightly be fine. However Walboro offers an intake fuel pump for close to 100$ spend the extra $$

 

For the most part, you should be fine. You may need to add an aftermarket FPR, but it depends on how it runs. I guess the question should be, what is the purpose of the 440cc injectors? If the engine is stock you're wasting money and gas.

 

yep, and if your going turbo and need the 440 injectors you also then need a bigger fuel pump

 

That isn't necessarily the case. I installed 440cc injectors on my brother's '95 GSR with a greddy turbo kit. He's running the stock pump up to 10psi along with a Hondata ECU with no fuel problems.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civicgsr &raquo;</TD></TR><TR><TD CLASS="quote">That isn't necessarily the case. I installed 440cc injectors on my brother's '95 GSR with a greddy turbo kit. He's running the stock pump up to 10psi along with a Hondata ECU with no fuel problems.
</TD></TR></TABLE>

ouch, that pump must be working its *** off..

 

i have i/h/e/fuel rail. the SC will be on after i get back from iraq. some one told me the injectorswill have a use with the few mods that i have for now.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blksiryder &raquo;</TD></TR><TR><TD CLASS="quote">i have i/h/e/fuel rail. the SC will be on after i get back from iraq. some one told me the injectorswill have a use with the few mods that i have for now. </TD></TR></TABLE>

no, they wont really have a use for now, unless you want to run overly rich and idle like crap.
like it is you prolly have a bunch left on your stock injector duty cycle

 

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

no, they wont really have a use for now, unless you want to run overly rich and idle like crap.
like it is you prolly have a bunch left on your stock injector duty cycle</TD></TR></TABLE>

I had once read, probably on Zdyne's webiste, that the stock GSR pump actually flows more than those found on DSM's...so it's a good strong pump for decent FI setups.

-Alex

 

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

no, they wont really have a use for now, unless you want to run overly rich and idle like crap.
like it is you prolly have a bunch left on your stock injector duty cycle</TD></TR></TABLE>

Definitely! You'll have raw fuel coming out of the exhaust with your setup. Once you get the SC, then you can think about the 440cc injectors.

-Alex

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">
ouch, that pump must be working its *** off..</TD></TR></TABLE>

10 psi on a B18C1 running a small 18G? No, he's not even close to the 300 whp where everything starts getting iffy with that setup. Some of the tubular manifold SC61 combos make 300 whp at or before 10 psi, that's working to fuel pump to death.