honda fuel pumps
 

what are the stock fuel pumps efficient to what psi?

Re: honda fuel pumps
 

Are you talking fuel pressure or boost? You really need to be more clear on what you're trying to figure out.

Re: honda fuel pumps
 

do you really want to find out?

Re: honda fuel pumps
 

um i want to know both can a stock pump handle 12 psi i have a maximum boost book and i want to do some of the equations so i under stand the amount of fuel i really need

Re: honda fuel pumps
 

Then you probably need to know how much cfm your turbo flows as well as the head your using and like volumetric efficiency crap that I understand nothing about, But I figure it has something to do with how much air is going to flow through your motor at 12 psi with your particular setup. Then you would probably divide that number by 12.5 and then you get how much fuel you’re going to need for 12 psi on your car.
But math does own me.

Re: honda fuel pumps
 

basicly, Honda pumps are ment for the stock Honda power....you boost the motor BUY A BIGGER PUMP... they are only 100bucks... ::)

Re: honda fuel pumps
 

yeah.. leave some -------s ways for the get a fuel pump stock, get some aftermarket Fuel pump and run ....

Re: honda fuel pumps
 

1. I'm not sure what that comes to
2. Walter just said ----? :S

Re: honda fuel pumps
 

I think Walters drunk.

Re: honda fuel pumps
 

yup i did... ;D ..

i means , get a good fuel pump like walbro or so and leave those equations....

while less equations you have = your live will be better :8

Re: honda fuel pumps
 

I still don't understand Walters bantering nonsense version of english.

Re: honda fuel pumps
 

or cheaper in some cases ;)

Re: honda fuel pumps
 

For Turbo Combonations: Total Horsepower (flywheel horsepower + parasitic horsepower used) = Wheel Horsepower /.80

For Gasoline Engines: LPH fuel demand = Total Horsepower x .3158

You need to find your goal/predicted wheel horsepower, then plug it into the equation. I'm not sure, but I bet there is a turbo calculator out there somewhere that will give you a rough estimate of the horsepower you'll make at what PSI. Then, cross reference your LPH demand with the specs on the Honda stock fuel pump.

hope that helps.

Re: honda fuel pumps
 

You should probably order a few of those Ometers. A lot of people are going to want a cheap gauge for their lc-1 or a smaller one form a big lm-1. You have one empty spot in your menu on your site anyway. Might as well fill it with something.

Re: honda fuel pumps
 

you dont understand my english or what im trying to say?

i was kidding..

sorry.. but well.. if you can to get a better fuel pump to good price, why to make this more difficult? ..

Re: honda fuel pumps
 

LMAO Walter's English skills FTW.

Get a bigger fuel pump. Part of the problem is your reading "Maximum Boost"

Re: honda fuel pumps
 

----.. i dont understand nothing :S ;D

yeh.. those kinda books are very helpful , im reading a good book too but you have to know some times are different on the real- world :8

Re: honda fuel pumps
 

as i know the stock fuel pump is good enough to 250 hp .
if iam wrong someone right me

Re: honda fuel pumps
 

Yeah that's about right. about 250ish whp. It goes up if you rewire it with thicker wire.

I just found this nugget of wisdom. Be grateful, it took me a few minutes to find.

Re: honda fuel pumps
 

what is that fuel pump "10 gauge"?

Re: honda fuel pumps
 

it's the thickness of the wire that is used to wire the fuel pump.

Re: honda fuel pumps
 

and why it's able to suplier enought gas for more power just with a thicker wire? ive seen if you connect the fuel pump directly to battery..getting lil improve on it...but...

Re: honda fuel pumps
 

Walter, walter, walter........ Study electronics, and you'll understand how wires affect current ;)

Re: honda fuel pumps
 

Check out this link:

http://www.roadraceengineering.com/fuelpumptechtip.htm

And this link:

http://www.roadraceengineering.com/f...pflowrates.htm

DSM centric, but it'll open your eyes to how voltage supplied to a pump effects flow rates. I'm always suprised that more Honda people don't re-wire their pumps.

Re: honda fuel pumps
 

cool info, ill read them when i return of my work...

mike.. ill do :1

Re: honda fuel pumps
 

Yeah, it is interesting. A LOT of other car guys praise this very early on in a build. Without even thinking, dsms, supras, 3Ss, and that's just from cars i've owned or my buddies have owned.

Re: honda fuel pumps
 

this is a little late, but most stock pumps can supply fairly big injectors as long as you keep the stock fuel pressure, remember, pressure=restriction to flow, it does mean more flow, it means less. bump the pressure and you loose flow to the injectors.

Re: honda fuel pumps
 

False, increased pressure to the injectors MEANS MORE flow. Period.

The problem is that when you increase the pressure, the pump can't flow enough at the increased pressure.


It works the same in turbochargers. Raise the pressure and you will get to a point were the turbo can't flow enough at the pressure you want.

Re: honda fuel pumps
 

i think that happen with Airflow..

Re: honda fuel pumps
 

False, increased pressure to the injectors MEANS MORE flow. Period.

The problem is that when you increase the pressure, the pump can't flow enough at the increased pressure.


It works the same in turbochargers. Raise the pressure and you will get to a point were the turbo can't flow enough at the pressure you want.

yes that's true, increased pressure does mean increase flow at the injector, but i was referring to a law of fluid dynamics, increased pressure=restriction to flow, and of course this is true, because we have a fuel pressure regulator on the return side of the fuel rail, sorry should have been more specefic. But you did say what was i getting at "the pump can't flow enough at the increased pressure" because as pressure increases flow decreases, it takes a bigger pump to flow at higher pressures.

Re: honda fuel pumps
 

I've refused to tune cars where the owner didn't run new fuel pump wire when I told him to. It's so significant a change that I can tell if the fuel pump wiring is stock or not by how the fuel pump sounds when the key is cycled.

Re: honda fuel pumps
 

Does someone know if I there's a write up somewhere on how to rewire a honda fuel pump? I'll do it. I saw it done on a talon i was working on a few weeks ago. They had everything going into a relay about a foot away from the pump.

But I'm interested in doing it. I should be doing anturbo install start to finish marathon on my accord the day after christmas. I have all peices and parts accounted for and ready for assembly. It taken me a whole freaking year to do get this together. ---- I'm a loser

Re: honda fuel pumps
 

mm good hearing david..

and yes..is there some write-up about how to rewire a honda fuel pump? :y id like to see one!

Re: honda fuel pumps
 

Either use, or mention that you can use, a spare Honduh headlight relay. Everyone seems to throw them away; better than spending a few bucks on one, you know. ;)