i want to have my fuel rail bored out to have a higher flow. what dimensions and thread do i tell them at the machine shop? anybody?

1995 accord ex(f22b1) sohc vtec.

thanks

 

What makes you think your fuel rail is inadequate?

 

injectors dictate fuel flow.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andy R &raquo;</TD></TR><TR><TD CLASS="quote">What makes you think your fuel rail is inadequate?</TD></TR></TABLE>

Cause bigger is ALWAYS better BRO!!!!!11!!!

 

i want to have my fuel rail bored out to have a higher flow. what dimensions and thread do i tell them at the machine shop? anybody?

 

what size injectors are you running? what's ur setup? turbo? N/A? And instead of getting it bored, why don't you get a fpr to help increase the fuel pressure if you need more fuel for your setup. If you really want to get a bigger bore size, I believe that they sell BDL fuel rails on ebay for approx $40. I know they mainly have them for h22. Not sure if it's the same pattern as f22. If it can work it'll look better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hb_guy &raquo;</TD></TR><TR><TD CLASS="quote">i want to have my fuel rail bored out to have a higher flow. what dimensions and thread do i tell them at the machine shop? anybody?</TD></TR></TABLE>

Why? What makes you believe your rail is a limiting factor?

What flow rate are you looking for?

Maybe if you provided some useful information, you could get a useful answer. . .

 

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

Why? What makes you believe your rail is a limiting factor?

What flow rate are you looking for?

Maybe if you provided some useful information, you could get a useful answer. . . </TD></TR></TABLE>

Dude he just wants it bigger. So give him what he wants.

Just consider this small factor original poster. Your rail will absolutely NOT be the limiting factor in this set-up, ever. Well i won't say never, but not for a very long time. Without changing the connection between the rail and the fuel filter/pump, that connection point is going to be the restriction, not the rail itself. But it really isn't a restriction anyway, so don't worry about it. Up fuel pressure before you try directly increasing holding volume.


Have them bore it out to the largest AN fitting that would work. AN-10 or 12 or something.

Honestly, trust the people here, don't get it bored out, it's a waste of your money, get a CAI or something.

 

most aftermarket fuel rails are between 11/16" and 3/4" bore but if your factory fuel rail is limiting your hp I want to see your dyno of before and after the fuel rail boring since Im sure your making 800+ hp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hb_guy &raquo;</TD></TR><TR><TD CLASS="quote">i want to have my fuel rail bored out to have a higher flow. what dimensions and thread do i tell them at the machine shop? anybody?</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dfoxengr &raquo;</TD></TR><TR><TD CLASS="quote">injectors dictate fuel flow. </TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Howitt &raquo;</TD></TR><TR><TD CLASS="quote">most aftermarket fuel rails are between 11/16" and 3/4" bore but if your factory fuel rail is limiting your hp I want to see your dyno of before and after the fuel rail boring since Im sure your making 800+ hp</TD></TR></TABLE>

first of all, the original question merely seeks information. apparently i asked in the wrong forum. the motivation behind the fuel rail boring is simply a cheaper alternative to an aftermarket fuel rail.

now, are all you professional welders and fabricators satisfied?? it's like your knowledge has become a dick measuring contest with a bunch of amateur know it alls...

this is why h-t sux. nine posts and not one person posted an answer or credible response to a simple question... bunch of...

 

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

first of all, the original question merely seeks information. apparently i asked in the wrong forum. the motivation behind the fuel rail boring is simply a cheaper alternative to an aftermarket fuel rail.

now, are all you professional welders and fabricators satisfied?? it's like your knowledge has become a dick measuring contest with a bunch of amateur know it alls...

this is why h-t sux. nine posts and not one person posted an answer or credible response to a simple question... bunch of... </TD></TR></TABLE>

Lol. The point that people where making was, you have no reason to bore out even a stock fuel rail because they support massive amounts of HP without going to aftermarket or even having to bore them out.

 

Well its difficult to tell you the thread and pitch because we have no idea what fuel lines you are running or other items you have attached so its like throwing rocks in the dark. Your asking questions only you can answer.

Yes the people on honda-techs are dicks but they have such a vast amount of knowledge they are willing to share if you ask the right questions that have not been answered 723 times

If you I were you, a question stated like this " Im considering boring out my factory fuel rail for more flow, will this help me with setup xxx or am I better off spending my money somewhere else to get to my hp goal of XXX. " Would of gotten 10 times better reponse with real answers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hb_guy &raquo;</TD></TR><TR><TD CLASS="quote">first of all, the original question merely seeks information. apparently i asked in the wrong forum. the motivation behind the fuel rail boring is simply a cheaper alternative to an aftermarket fuel rail.

now, are all you professional welders and fabricators satisfied?? it's like your knowledge has become a dick measuring contest with a bunch of amateur know it alls...

this is why h-t sux. nine posts and not one person posted an answer or credible response to a simple question... bunch of... </TD></TR></TABLE>

huh???

Everyone so far has fairly nicely told you that there is no reason to increase the size of the stock rail because it can support plenty of fuel. We asked you to give us a reason behind needing an increased bore rail, which you have not yet given a real answer. You say its a cheaper alternative than getting aftermarket fuel rail, well whats the reason you think you need an aftermarket fuel rail?

Here are some answers that you could have said that I find valid...

Boring stock fuel rail:
1. Everything else in my fuel system has been upgraded and i'm running so much horse power that I feel my fuel rail may be limiting the flow.

Using aftermarket fuel rail:
1. I want to run stainless braided fuel lines and buying a aftermarket rail will help me support using AN fittings.
2. I just want my engine to have some bling
3. I want to use a high flow injector that has a larger diameter than stock injector bore and it will be easy to machine each injector hole.
4. Support high power as above.
5. Able to mount pressure gauge on rail.

I just don't see what your purpose to bore out a stock rail is if you know you aren't even coming close to pushing the limit of the stock bore rail. Spend the $ to replace your fuel filter or something instead.

 

You guys are a bunch of know it alls...
Why does he have to post his setup to get a simple answer? Maybe he has a monster of a turbo setup. Does it matter? He wants to do it. Also, have a larger diameter fuel rail can help with pressure fluctuations.

OP, take it to a machine shop and see how far they think they can bore it out while still leaving enough metal to thread your desired fitting into it. Let them know the kinds of pressure it will be running. It may make them back off a little, and keep you on the safe side of things. Hopefully, you have bigger fuel lines run from the tank.
After checking what it will cost to have it machined, you may change your mind...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bakeoff &raquo;</TD></TR><TR><TD CLASS="quote">You guys are a bunch of know it alls...
Why does he have to post his setup to get a simple answer? Maybe he has a monster of a turbo setup. Does it matter? He wants to do it. Also, have a larger diameter fuel rail can help with pressure fluctuations.

OP, take it to a machine shop and see how far they think they can bore it out while still leaving enough metal to thread your desired fitting into it. Let them know the kinds of pressure it will be running. It may make them back off a little, and keep you on the safe side of things. Hopefully, you have bigger fuel lines run from the tank.
After checking what it will cost to have it machined, you may change your mind...</TD></TR></TABLE>

then why doesnt he just tell us what hes running?

 

With the price a machine shop is going to charge, you could buy a aftermarket one.

 

Bore it big enough to where you have a uniform .1" sidewall in all portions. That is, of course only if you need more flow, and or you have type R, or nos stickers displayed on the exterior of your car, therefore denoting a need for extra flow for the bullshit to make it into the engine.

P.S. I left out the part, if you have anything JDM on your car, you definately need to bore it out. And btw, engrave "Authentic JDM" on the outside of said modified fuel rail.


Modified by xx32racer32xx at 10:50 PM 5/31/2007

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bakeoff &raquo;</TD></TR><TR><TD CLASS="quote">You guys are a bunch of know it alls...
Why does he have to post his setup to get a simple answer? </TD></TR></TABLE>

Its generally better than not knowing ****.

For starters, "how big" is dependent on several factors, none of which he has given us. You might as well ask "how high should I jump" or "how tall is tall?"

You want an pointless answer to pontless question? Fine, the answer is seven. Bore it seven.

 

Wow, someone's on the rag...
So, I should have said that everyone should be asking what the setup is to get a good idea of the needs. Not just saying "there's no way you will need it, so I'm going to get my panties in a twist."
Really, going bigger with a stock rail won't hurt him. There's almost no way he can bore the stock metal so big that it would cavitate or cause a pressure drop that couldn't easily be solved by raising fuel pressure.
You guys are really quick to point out that other people are doing things wrong without asking for more info, but assuming it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bakeoff &raquo;</TD></TR><TR><TD CLASS="quote">You guys are really quick to point out that other people are doing things wrong without asking for more info, but assuming it. </TD></TR></TABLE>

WTF? The first thing I did was ask what flow rate he was looking for and point out that we needed more information to give him a meaninful response. He answered by repeating the exact same post.

As for assuming; Mr Pot, this is Kettle. . .

 

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

the motivation behind the fuel rail boring is simply a cheaper alternative to an aftermarket fuel rail.

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

Boring out the stock fuel rail is just plain stupid. Go ahead. bore it out close to -6AN (3/8") and go waste some money.

 

might as well ask us...

"I need new shoes, what size should I get?"

 

i think most of them were just curious of your set up and also confident you didnt need a larger diameter fuel rail because yours was adequite for the job it it was indeed stock.
dont get into a bitchfit because you didnt state the question enough and are two busy whining about how ht a site that hugely helps many people and is full of amazing knowledge for any level of learning is just a place to flex your knowledge. tell em your setup and your reason for thinking you need better fuel flow and i garontee you someone will help you.

 

it would probably be cheaper and easier to buy a aftermarket aluminum fuel rail than paying a machine shop to modify the stock one.

you can find no-name brand fuel rails for 50-70 bucks or so. i don't think its worth modifying the stock rail.