walbro 190, will it make a difference? - Toyota Nation Forum : Toyota Car and Truck Forums

old red · 02-07-2010, 07:52 AM

hi guys
i got a '00 camry V6, with i/h/e, 5 speed
i wana add some more power
i'm thinking fuel pump

so how about this walbro 190 pump?
will directly fit? or does it need some sort of fabrication?

also, will it decrease my air/fuel ratio?
i'm looking for something around 13.5 AFR

chronoti · 02-07-2010, 08:16 AM

it more or less a direct fit, you just need to splice the connector,

a/f change no.

you want to change the a/f your gonna need a piggy back like the smt-8, you will need to trick the ecu to dump more fuel or else no matter what you do your gonna sit at 14.7

bigbird · 02-07-2010, 09:26 AM

even tuned the stock motor needs no added fuel. it wont help you unless your boosted or go heavy into the NA mods. if your getting a good deal on it then it may be somthing good to pick up so that if you ever do go FI youll have a pump already(even thought its only works well on low boost).

old red · 02-07-2010, 07:45 PM

Quote:

Originally Posted by chronoti

it more or less a direct fit, you just need to splice the connector,

a/f change no.

you want to change the a/f your gonna need a piggy back like the smt-8, you will need to trick the ecu to dump more fuel or else no matter what you do your gonna sit at 14.7

that's what i thought too
anyways, how does the ecu know how much fuel goes from each injector?
is the oxygen sensors in the exhaust?
cause beyond the point of combustion, the only form of monitoring is the oxygen sensors and the EGR valve thing... i dont get it

i thought the injectors get instructed to inject fuel for a certin time according to the MAF readings...etc
and since the pump gives a constant pressure, with the fixed time that cant be controlled after combustion... seems to me that adding more pump power will give more fuel... check me!

old red · 02-07-2010, 07:49 PM

You Tube

that's my girl

bigbird · 02-07-2010, 09:32 PM

Quote:

Originally Posted by old red

that's what i thought too
anyways, how does the ecu know how much fuel goes from each injector?
is the oxygen sensors in the exhaust?
cause beyond the point of combustion, the only form of monitoring is the oxygen sensors and the EGR valve thing... i dont get it

i thought the injectors get instructed to inject fuel for a certin time according to the MAF readings...etc
and since the pump gives a constant pressure, with the fixed time that cant be controlled after combustion... seems to me that adding more pump power will give more fuel... check me!

the ECU has a fuel map that tells the injectors how much fuel to let in based on RPM, air temp, throttle position and a few other factors (mostly from the MAF). the piggy back intercepts signals from the MAF and changes them on their way to the ECU.

the O2 sensor is on each bank of the exhaust and pased the cat(if you have one).

EGR does nothing but get in the way, and has nothing to do with the fuel curve unless it breaks and throws a CEL(which is triggered by a reading in the O2 sensors).

the issue in your reasoning is that you think you need more fuel. you dont. if you were boosted or had higher compression then you would.

old red · 02-07-2010, 09:37 PM

Quote:

Originally Posted by bigbird

the ECU has a fuel map that tells the injectors how much fuel to let in based on RPM, air temp, throttle position and a few other factors (mostly from the MAF).

the O2 sensor is on each bank of the exhaust and pased the cat(if you have one).

EGR does nothing but get in the way, and has nothing to do with the fuel curve unless it breaks and throws a CEL(which is triggered by a reading in the O2 sensors).

the issue in your reasoning is that you think you need more fuel. you dont. if you were boosted or had higher compression then you would.

dude a AFR of 13.5 gives optimum performance for NA sets
I've seen it on entirly stock v8s

i'm just looking for a cheep way to get an edge that's all