440cc injectors on mild all motor ls vtec?
03-14-2007, 07:52 PM
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440cc injectors on mild all motor ls vtec?
i have a modest set up and i have some 440's from when i wanted to go turbo, would these be better to sell and get some 310's or something around there or could the 440's work, or just stick with stockers, heres the run down
B18b 81.5 block
usdm b16 pistons (11.7:1)
GSR head w/ Blox type b's and valve train
Skunk2 IM(type r)
egay header(2.25)
2.5inch exhaust w/twin loop
sirg tranny w/lsd
im using a VAFC2 to tune...
B18b 81.5 block
usdm b16 pistons (11.7:1)
GSR head w/ Blox type b's and valve train
Skunk2 IM(type r)
egay header(2.25)
2.5inch exhaust w/twin loop
sirg tranny w/lsd
im using a VAFC2 to tune...
03-14-2007, 08:13 PM
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Re: (eg714)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eg714 »</TD></TR><TR><TD CLASS="quote">i use 440 with my set up very simliar to yours but i tuned with hondata </TD></TR></TABLE>
ditto. ditch that **** and get something better.
as for the injectors i would say they are fine
ditto. ditch that **** and get something better.
as for the injectors i would say they are fine
03-14-2007, 08:27 PM
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Re: (one slow coupe)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by one slow coupe »</TD></TR><TR><TD CLASS="quote">
ditto. ditch that **** and get something better.
as for the injectors i would say they are fine</TD></TR></TABLE>
what are you talking about?
ditto. ditch that **** and get something better.
as for the injectors i would say they are fine</TD></TR></TABLE>
what are you talking about?
03-14-2007, 08:30 PM
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Re: (eg714)
i think he may have been referring to me using a vafc? i took this into consideration before i bought the unit. the problem is that getting hondata tuned for me would include trailoring my car 2 hours south or here to get it tuned at king motorsports. where as theres a shop in appleton that can dyno tune my vafc and its much closer
03-15-2007, 08:31 AM
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Re: (JAYSEM Society)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JAYSEM Society »</TD></TR><TR><TD CLASS="quote">get tuned with the vafc since its close and then drive 2 hrs to get tuned on crome. Just a thought. 
</TD></TR></TABLE>
I was thinking the same thing, then I scrolled down
. Then sell that vafc (junk)
</TD></TR></TABLE>I was thinking the same thing, then I scrolled down
. Then sell that vafc (junk)
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03-15-2007, 02:54 PM
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You will have to pull so much fuel out of the vafc to get the 440's right it will be rediculous with yout timing. Trailering the car is better than wrecking your build man.
03-21-2007, 06:07 PM
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Re: (Jay_Sensing)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jay_Sensing »</TD></TR><TR><TD CLASS="quote">You will have to pull so much fuel out of the vafc to get the 440's right it will be rediculous with yout timing. Trailering the car is better than wrecking your build man.</TD></TR></TABLE>
the 440's would just be a failsafe, not that i need them. i just dont want to max out my stockers while im at the dyno.
the 440's would just be a failsafe, not that i need them. i just dont want to max out my stockers while im at the dyno.
03-21-2007, 06:09 PM
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im using 650s of my turbo setup on my built ls vtec on hondaqta and there good it aint wasting too much gas or nothing its normal id use them 440s if i was you that be good as long as you got a good ems
03-22-2007, 07:56 AM
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Re: (Echo7847)
440's are okay if you plan to use crome, hondata or the like. Or a full stand alone fuel system.
440's are a no no with a 1.8 and a vafc.
use 310's if you plan to keep your vafc
440's are a no no with a 1.8 and a vafc.
use 310's if you plan to keep your vafc
03-22-2007, 01:29 PM
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Re: (Echo7847)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Echo7847 »</TD></TR><TR><TD CLASS="quote">Maybe be a tad big for your setup but you'll have room to grow. Keep them and get better engine management (hondata, crome, etc)</TD></TR></TABLE>
Agreed. VAFC only lets you adjust fuel trim, which is a very broad form of tuning for your fuel needs. It's ok for cleaning up afr's I guess, but the real power comes in being able to change injector pulse width over a more precise range.
Which brings me to this: 440's should work fine, but you'll probably run hella rich, due to the fact that your computer still thinks you're running 240cc injectors. The amount of fuel dumped by an 240cc injector with 3ms of on time is going to be significantly less than the amount dumped by a 440cc with the same on time.
The fuel trim adjustment is basically hacking the signal telling the computer it needs to run richer (+1 to +7 or something), or leaner (-1 to -7). So the computer will act accordingly. Standalones will allow you to use a multiplier for the injectors, so that the injector duration is modulated accordingly.
Agreed. VAFC only lets you adjust fuel trim, which is a very broad form of tuning for your fuel needs. It's ok for cleaning up afr's I guess, but the real power comes in being able to change injector pulse width over a more precise range.
Which brings me to this: 440's should work fine, but you'll probably run hella rich, due to the fact that your computer still thinks you're running 240cc injectors. The amount of fuel dumped by an 240cc injector with 3ms of on time is going to be significantly less than the amount dumped by a 440cc with the same on time.
The fuel trim adjustment is basically hacking the signal telling the computer it needs to run richer (+1 to +7 or something), or leaner (-1 to -7). So the computer will act accordingly. Standalones will allow you to use a multiplier for the injectors, so that the injector duration is modulated accordingly.
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