drilling a larger bore for fuel
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From: Kent, WA, USA
drilling a larger bore for fuel
Has anyone bored out their stock fuel rail on a 92-95 vtec to a 1/2", or maybe 9/16"? Online you can buy larger bore fuel rails for $100+, but I'm thinking if I can't find a drill bit long enough I could always get it done up at a machine shop cheap. Then at the same time I can get a fuel pressure gauge drilled/tapped/installed just as easy. Dose anyone have any input?
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From: Canada
Re: drilling a larger bore for fuel (Mike K)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mike K »</TD></TR><TR><TD CLASS="quote">once the rail is pressurized, it doesn't make a difference. i never understood why people use aftermarket fuel rails.</TD></TR></TABLE> 
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From: Baltimore, maryland, usa
Re: drilling a larger bore for fuel (Mike K)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mike K »</TD></TR><TR><TD CLASS="quote">once the rail is pressurized, it doesn't make a difference. i never understood why people use aftermarket fuel rails.</TD></TR></TABLE>
So you can run an aftermarket external fuel pressure regulator..
So you can run an aftermarket external fuel pressure regulator..
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From: Bellingham, WA, sucka
Re: drilling a larger bore for fuel (tgreaves)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tgreaves »</TD></TR><TR><TD CLASS="quote">
So you can run an aftermarket external fuel pressure regulator..</TD></TR></TABLE>
so why wouldn't you just drill and tap the stock one?
So you can run an aftermarket external fuel pressure regulator..</TD></TR></TABLE>
so why wouldn't you just drill and tap the stock one?
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Thread Starter
Joined: Aug 2004
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From: Kent, WA, USA
Re: drilling a larger bore for fuel (Mike K)
The pressure can be changed simply by installing a fuel pressure regulator, but buy boring out the fuel rail allows for more flow, greater volume of fuel to each injector. Greater fuel on hand could make a huge diffrence (although as someone stated you won't need it until 350hp). Thanks people.
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Re: drilling a larger bore for fuel (Proglow3)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Proglow3 »</TD></TR><TR><TD CLASS="quote">... but buy boring out the fuel rail allows for more flow, greater volume of fuel to each injector...</TD></TR></TABLE>That only makes sense if the fuel rail were a dominant resistance to flow. Boring out the fuel rail doesn't do anything about the flow resistance thru the tubing from the tank, thru the filter, etc...
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From: Severn, MD
Re: drilling a larger bore for fuel (Mike K)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mike K »</TD></TR><TR><TD CLASS="quote">so why wouldn't you just drill and tap the stock one?</TD></TR></TABLE>
Because people are lazy and would rather buy something that already has it done and have the 'peace of mind' that it'll work correctly.
It takes themselves out of the error equation.
And honestly, if you're looking for things to bore out, then look to the banjo bolt connecting the fuel filter to the feed hose.
Honda Tuning mag - Fuel Systems 101
Because people are lazy and would rather buy something that already has it done and have the 'peace of mind' that it'll work correctly.
It takes themselves out of the error equation.
And honestly, if you're looking for things to bore out, then look to the banjo bolt connecting the fuel filter to the feed hose.
Honda Tuning mag - Fuel Systems 101
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