do i need a bigger fuel rail?

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01-16-2005, 12:11 PM

1.8

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do i need a bigger fuel rail?

setup:

stock LS block
built LS head
T3/T4E
Hondata

fuel setup:
440cc injectors
walbro intank
fuel pressure regulator/fuel gauge

just want your opinion. don't want to spend more money if i don't need to. i'd rather spend it on tuning but if this will make my tuning session easier, ill do it

Modified by 1.8 at 1:46 PM 1/16/2005

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01-16-2005, 12:30 PM

Casey

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Re: do i need a bigger fuel rail? (1.8)

nope

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01-16-2005, 12:31 PM

Dunc

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Re: do i need a bigger fuel rail? (1.8)

I don't think so. I am running the ls/vtec with a t3/t4 at 15 psi and 550cc's. I don't have any problems.

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01-16-2005, 12:38 PM

CalhounBoi

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Re: do i need a bigger fuel rail? (Dunc)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dunc »</TD></TR><TR><TD CLASS="quote">I don't think so. I am running the ls/vtec with a t3/t4 at 15 psi and 550cc's. I don't have any problems.</TD></TR></TABLE>
what size turbo and how much hp?

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01-16-2005, 12:46 PM

1.8

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Re: do i need a bigger fuel rail? (CalhounBoi)

forgot to put i have injectors.

so basically, it's all bling?

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01-16-2005, 01:54 PM

Sohc Driver

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Re: do i need a bigger fuel rail? (1.8)

I am running a stock fuel rail.

B18b
T3/To4e
750cc injectors
Hondata
Walbro 255lph-hp intank fuel pump
stock fuel pressure regulator
stock fuel rail

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01-16-2005, 02:07 PM

1.8

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Re: do i need a bigger fuel rail? (Sohc Driver)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sohc Driver »</TD></TR><TR><TD CLASS="quote">I am running a stock fuel rail.

B18b
T3/To4e
750cc injectors
Hondata
Walbro 255lph-hp intank fuel pump
stock fuel pressure regulator
stock fuel rail</TD></TR></TABLE>

how much whp u puttin' out? u think i'll be good with 440 injectors or should i go bigger? i just want around 300whp.

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01-16-2005, 02:16 PM

Muckman

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Re: do i need a bigger fuel rail? (Casey)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Casey »</TD></TR><TR><TD CLASS="quote">nope</TD></TR></TABLE>

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01-16-2005, 02:26 PM

SOHC_MShue

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Re: do i need a bigger fuel rail? (1.8)

you will be fine with the stock rail.

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01-16-2005, 02:40 PM

#10

Sohc Driver

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Re: do i need a bigger fuel rail? (1.8)

440cc injectors are plenty...

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01-16-2005, 03:01 PM

#11

T4eg

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Re: do i need a bigger fuel rail? (1.8)

No, ur stock fuel rail will be fine

Chris

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01-16-2005, 07:04 PM

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ccivic

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Re: do i need a bigger fuel rail? (Sohc Driver)

For a LS.. You're going to need bigger than 440s if you're looking to make 300HP. My brother had a 93hatch LS boosted.. est 220whp. 450cc injectors maxed out at 7grand @ 8-9psi. This was tuned by Blundar from http://www.pgmfi.com (super honda tuning guru guy). I would start looking in the 500s or 600s.

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01-16-2005, 07:32 PM

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MooreBoost

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Re: do i need a bigger fuel rail? (Casey)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Casey »</TD></TR><TR><TD CLASS="quote">nope</TD></TR></TABLE>

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01-16-2005, 08:00 PM

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1.8

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Re: do i need a bigger fuel rail? (ccivic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ccivic »</TD></TR><TR><TD CLASS="quote">For a LS.. You're going to need bigger than 440s if you're looking to make 300HP. My brother had a 93hatch LS boosted.. est 220whp. 450cc injectors maxed out at 7grand @ 8-9psi. This was tuned by Blundar from http://www.pgmfi.com (super honda tuning guru guy). I would start looking in the 500s or 600s.

</TD></TR></TABLE>

damn, u serious? that bad?

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01-17-2005, 08:14 AM

#15

RyanEJ8

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The stock rail should be able to flow enough fuel for around 500whp.

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01-17-2005, 09:42 AM

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SOHC_MShue

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Re: do i need a bigger fuel rail? (ccivic)

</TD></TR></TABLE>
this doesn't make sense. Those 450's shouldn't max out at only 220whp. What was this car tuned with? If its tuned with uberdata then the duty cycle percentages are somewhat off. I've heard of people running 120% duty cycle and the injectors weren't actually maxing out.

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01-17-2005, 11:55 AM

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1.8

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Re: do i need a bigger fuel rail? (SOHC_MShue)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue »</TD></TR><TR><TD CLASS="quote">this doesn't make sense. Those 450's shouldn't max out at only 220whp. What was this car tuned with? If its tuned with uberdata then the duty cycle percentages are somewhat off. I've heard of people running 120% duty cycle and the injectors weren't actually maxing out. </TD></TR></TABLE>

that's what i'm wondering. so should i keep my 440's or sale/trade em?

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01-17-2005, 12:19 PM

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DaX

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Isn't the stock rail/line ID good for approx. 400 hp?

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01-17-2005, 02:16 PM

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BoostedEG6

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Re: (DaX)

^^^ yeah I have heard from some tunners that the stock fuel rail can hold up to like 500whp but I might be mistaken.

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01-18-2005, 06:15 PM

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ccivic

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Re: do i need a bigger fuel rail? (SOHC_MShue)

Yeah.. was tuned using Uberdata. The injectors were pretty close to being maxed out according to Dave ( Blundar ). Either way.. I would definitely go bigger than 440cc.

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01-18-2005, 06:22 PM

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1.8

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Re: do i need a bigger fuel rail? (ccivic)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ccivic »</TD></TR><TR><TD CLASS="quote">Yeah.. was tuned using Uberdata. The injectors were pretty close to being maxed out according to Dave ( Blundar ). Either way.. I would definitely go bigger than 440cc.

</TD></TR></TABLE>

u think it's because of uberdata or the tuner? i'm pretty sure 440s don't max out at 220.

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01-18-2005, 06:28 PM

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Re: do i need a bigger fuel rail? (ccivic)

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01-18-2005, 06:29 PM

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Re: do i need a bigger fuel rail? (1.8)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8 »</TD></TR><TR><TD CLASS="quote">u think it's because of uberdata or the tuner? i'm pretty sure 440s don't max out at 220. </TD></TR></TABLE>

double post

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01-19-2005, 08:21 AM

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RyanEJ8

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Re: do i need a bigger fuel rail? (1.8)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8 »</TD></TR><TR><TD CLASS="quote">

u think it's because of uberdata or the tuner? i'm pretty sure 440s don't max out at 220. </TD></TR></TABLE>

You're right, they don't. The stock 240's are good to almost 220whp.

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