my friend and i are installing his rev hard stage 2 kit on a 00 si w/ b16.
for now hes running a vortech fmu and a walbro 255 pump. he has some rc 310 injectors he got in a trade of parts. if we install them will they work with stock ecu and fmu ,or will they just bogg because becasue there not tuned.. my thinking is 85 to 90% duty cycle on the 310 will be better than the stock injectors,.. thanks

 

ive read that you can make the fmu from 12:1 to 8:1 or 10:1, would this setup of bigger injectors work better with leaner mix.than a safe 12:1.cause im sure stock injectors with run duty cycle high im sure .//??

 

310 +pump+FMU = Super duper rich.

i tried. so i know.

hondata S100 is a good option. instead of FMU.

 

what if we turned up boost to maybe 9 or 10lbs .would that be too rich then ? thanks

 

well.. hard to say. at different rpms the pressure and delivery fluctuate. and a FMU won't give you the accuracy to run high boost.

after i swiched to hondata it was like night and day. super smooth power delivery + almost 20 hp i'm guessing. it felt that much faster.

the fmu gave a jerky ride and less power. also check valves just plain suck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by whiteb16a &raquo;</TD></TR><TR><TD CLASS="quote">my friend and i are installing his rev hard stage 2 kit on a 00 si w/ b16.
for now hes running a vortech fmu and a walbro 255 pump. he has some rc 310 injectors he got in a trade of parts. if we install them will they work with stock ecu and fmu ,or will they just bogg because becasue there not tuned.. my thinking is 85 to 90% duty cycle on the 310 will be better than the stock injectors,.. thanks </TD></TR></TABLE>

You need something like an AFC to trim the fuel if you run the 310's with the FMU. I had a 12:1 with 310's in the past and ended up trimming around 20%.

If you run it as is without something to control the injectors you won't make it past 6k rpm without sputtering especially with the Walbro

 

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

You need something like an AFC to trim the fuel if you run the 310's with the FMU. I had a 12:1 with 310's in the past and ended up trimming around 20%.

If you run it as is without something to control the injectors you won't make it past 6k rpm without sputtering especially with the Walbro </TD></TR></TABLE>

Can u give us more info on your setup you were running, boost?, turbo?

Cause I'm thinking of running the same seutp as u. 310's with 8:1 FMU with a v-afc to tune with. How did it work out for?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95VXB16A &raquo;</TD></TR><TR><TD CLASS="quote">

Can u give us more info on your setup you were running, boost?, turbo?

Cause I'm thinking of running the same seutp as u. 310's with 8:1 FMU with a v-afc to tune with. How did it work out for?</TD></TR></TABLE>

This was on my first GSR with a Drag Gen 2 kit. I believe the turbo was a standard t3/t4 Garrett turbo. I was boosting anywhere from 5 psi to .8 bar (11.8 psi) using the (what everyone considers to be ghetto) setup but it worked. I ran the Drag Kit as is for about a year with stock injectors, 12:1 FMU, and inline pump. I came across a set of 310's some dude was getting rid of and couldn't turn down the asking price.

Stuck them in and immediately noticed the car was running super rich. Couldn't get the car past 6k rpm without sounding like a lawn mower. Gradually leaned out the fuel curve 5% at a time until it felt decent. I didn't have a wideband back in the day so ears and butt dyno was all I had. It worked pretty good for a long while until the car got stolen. Ran the car a zillion times at the track with zero problems (well, other than broken axles). Best of 13.4 on 8 psi as is with full interior with 2 12" subs in the trunk.

 

Thanks for the info, good times.

 

i think u should get a safc and a 10:1 fmu disc my fren was running 440cc injectors and the safc helped alot

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iiilgsrlll &raquo;</TD></TR><TR><TD CLASS="quote">You need something like an AFC to trim the fuel if you run the 310's with the FMU.
</TD></TR></TABLE>

I think the purpose of an afc in this setup is to tune when in vacuum. THe afc doesn't see boost so say for example, you lean out 20% while in boost, in full throttle vacuum, you will also be leaning out by 20%. THat could create a lean mixture before boost and in low boost.