300 hp with stock fuel pump, will fine??
10-10-2007, 12:32 PM
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300 hp with stock fuel pump, will fine??
I want to know. Mine h22a JDM motor is over 300 hp with 92 civic stock fuel pump. will it's fine running?? or walbro 255 lph is better??
10-12-2007, 09:41 AM
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on that note, would you guys suggest the the same thing for a supercharged b16a2 on a 99 si? and 450cc injectors? will that solve my running rich problem i have?
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10-12-2007, 10:22 AM
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Re: (Frstyl838)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Frstyl838 »</TD></TR><TR><TD CLASS="quote">on that note, would you guys suggest the the same thing for a supercharged b16a2 on a 99 si? and 450cc injectors? will that solve my running rich problem i have? </TD></TR></TABLE>
well no. The fuel pump will pump MORE fuel. It will not make your car run richer or leaner if it's allready running right. The amount of fuel sprayed is regulated by fuel pressure and injectory duty cycle. If the pump pushes out more volume, the FPR will regulate the pressure. The injectors will only open to the ECU's set duty cycle regardless or fuel pressure or anything else. The ECU does not monitor fuel pressure.
The reason to get a fuel pump is if the injector cycle is long enough and the fuel pressure is high enough...but you cant get enough volume.
If your car is running rich, it's getting too much fuel.
The reason for that might be that your 450cc injectors are not tuned correctly. Your ECU still thinks it has stock injectors unless it is tuned for 450ccs. The injector duty cycle needs to go down since the 450cc injectors spray much more fuel in the same period of time as compared to the stock injectors.
Imagine you're the ECU:
You're trying to spray a bucket with half a quart of water. You usually do this with a garden hose and you know the amount of water that comes out of a garden hose per second.
You dont know whether you have a fire hose or a garden hose in your hand. You tell someone to open the nozzle for 2 seconds because you KNOW from prior experience that with a garden hose, you will fill up just about half a quart in 2 seconds. With a fire hose, you could spray a gallon in 2 seconds.
But if someone tells you that you have a fire hose in your hand instead of a garden hose...you will tell the nozzle guy to open the nozzle for very little time to get the desired amount of water.
well no. The fuel pump will pump MORE fuel. It will not make your car run richer or leaner if it's allready running right. The amount of fuel sprayed is regulated by fuel pressure and injectory duty cycle. If the pump pushes out more volume, the FPR will regulate the pressure. The injectors will only open to the ECU's set duty cycle regardless or fuel pressure or anything else. The ECU does not monitor fuel pressure.
The reason to get a fuel pump is if the injector cycle is long enough and the fuel pressure is high enough...but you cant get enough volume.
If your car is running rich, it's getting too much fuel.
The reason for that might be that your 450cc injectors are not tuned correctly. Your ECU still thinks it has stock injectors unless it is tuned for 450ccs. The injector duty cycle needs to go down since the 450cc injectors spray much more fuel in the same period of time as compared to the stock injectors.
Imagine you're the ECU:
You're trying to spray a bucket with half a quart of water. You usually do this with a garden hose and you know the amount of water that comes out of a garden hose per second.
You dont know whether you have a fire hose or a garden hose in your hand. You tell someone to open the nozzle for 2 seconds because you KNOW from prior experience that with a garden hose, you will fill up just about half a quart in 2 seconds. With a fire hose, you could spray a gallon in 2 seconds.
But if someone tells you that you have a fire hose in your hand instead of a garden hose...you will tell the nozzle guy to open the nozzle for very little time to get the desired amount of water.
10-12-2007, 06:07 PM
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i actually have stock injectors, not 450ccs! the analogy is very helpful though man, thanks. so what your pretty much saying is that i just need to get hondata?!
10-12-2007, 06:48 PM
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Re: (Frstyl838)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Frstyl838 »</TD></TR><TR><TD CLASS="quote">i actually have stock injectors, not 450ccs! the analogy is very helpful though man, thanks. so what your pretty much saying is that i just need to get hondata?!</TD></TR></TABLE>
Well some sort of engine management. Hondata is a good choice, but there are others.
OP: Yes, you do need a bigger fuel pump for 300hp.
Well some sort of engine management. Hondata is a good choice, but there are others.
OP: Yes, you do need a bigger fuel pump for 300hp.
10-12-2007, 09:37 PM
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Re: 300 hp with stock fuel pump, will fine?? (Kiddox)
if u have a set up making over 300 you shouldnt be asking a question like this...
can the pump handle it .. yes it can.. would it be wise? no it wouldnt
can the pump handle it .. yes it can.. would it be wise? no it wouldnt
10-12-2007, 09:56 PM
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Re: 300 hp with stock fuel pump, will fine?? (S@nt0s)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by S@nt0s »</TD></TR><TR><TD CLASS="quote">if u have a set up making over 300 you shouldnt be asking a question like this...
can the pump handle it .. yes it can.. would it be wise? no it wouldnt</TD></TR></TABLE>
what are YOU doing here?
can the pump handle it .. yes it can.. would it be wise? no it wouldnt</TD></TR></TABLE>
what are YOU doing here?
10-12-2007, 10:05 PM
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Re: 300 hp with stock fuel pump, will fine?? (B serious)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B serious »</TD></TR><TR><TD CLASS="quote">
what are YOU doing here?</TD></TR></TABLE>
i do own a EG
what are YOU doing here?</TD></TR></TABLE>
i do own a EG
10-12-2007, 10:08 PM
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Re: 300 hp with stock fuel pump, will fine?? (B serious)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B serious »</TD></TR><TR><TD CLASS="quote">
what are YOU doing here?</TD></TR></TABLE>
i was thinking the same thing when i seen santos in here
what are YOU doing here?</TD></TR></TABLE>
i was thinking the same thing when i seen santos in here
10-12-2007, 10:28 PM
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Re: 300 hp with stock fuel pump, will fine?? (-Gambit-)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -Gambit- »</TD></TR><TR><TD CLASS="quote">dont you have a evo to work on or something, i know evo's are always broke but come on. </TD></TR></TABLE>
not mine.. she was making 360whp with a/c,p/s on 91oct DD'd.... but she is back to stock now.. i need a truck to pull the EG around with
also working on a REX
</TD></TR></TABLE>not mine.. she was making 360whp with a/c,p/s on 91oct DD'd.... but she is back to stock now.. i need a truck to pull the EG around with
also working on a REX
10-16-2007, 03:56 PM
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Re: (B serious)
hondata is very great!!... I have one those. it's has red line is 9,000 because it's help u engine safe. Most I use 8,200 red line....my engine not break it up.. hondata very help!! 
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