Because that's how you create the return style.

 

really ok so you have to drill the rail then just tap in the line

also where does the blue silicone hose go to

 

Yes only one line, look at this picture.



Is the black hose that pass over the metal plate (metal plate that holds the tank). That's the one attached to the bottom of the regulator from the gas tank.

The blue silicone goes to a vacuum line. You have to cut one of the vacuum lines and Teed off the line.

 

oh ok so after the fuel pump and regulator and lines and install how much or were you able to install it your self

 

th way that fuel rail is set up you are still starving #4, possibly even 3. you are puting the fuel in to #1, nd takig it out at #2, 3 and4 are no different the with the returnless system. if you want to mae a retunstem worth while you need to ut the fuelin at on endof the rail and return it from the other.

had an issue with m buddys l61 turbo swapped sunbird starving #1. with the older l61 rails, fuel comes in #4 and the regulator is right above it. after poppng a piston, we had the regulator hole welded up and a fitting welded into the #1 end, fed the fuel in there and returned it form #4, worked like a charm

 

As far as i know there is none not that i have seen.

All the excuses i have seen of why the #4 Blows dont make sense or only partialy correct.
I say that due to the fact that most excuses that i have read disregards/ignores some basic laws of fluid dynamics. (im not going to go over every Fluid law & Principle. There are to many if you want to know more google it)

For example everyone says: "The #4 cylinder gets fuel last so it blows because of lack of fuel or loss of fuel pressure."
If you apply Pascal's law to the fuel rail you can see that this doesnt make sense to a certain degree.(I know there other factors this is just a big one) I dont know what the fuel press is at the fuel rail is, but for the conversation if the press at #1 is 70psi then the press at #4 should be to far off.

Lets look at some stuff that i have noticed:

People with stock or close to stock car are not blowing anything.
I know everyone or almost everyone knows the more power you want the more fuel you need.

Everyone does the following :
1) Heat exchanger
2) Smaller Pulley
3) Fuel Injectors (Anywhere from too small to just a little bigger to these are way to big for my application)

These are probrally the most common power mods.( I know there are more)
Well those mods all work together but im going to talk about fuel injectors now.

On the list above you can see i made a comment next to fuel injectors. I believe there is a problem with some not sizing their injectors correctly for their application.

Also you will notice is i didnt put "FUEL PUMP" on the list of most common mods.
I think this is a big issue, i could be wrong but i dont see a crap load of people with big power saying i just installed my new or better fuel pump.
I think this important Mod is over looked too often.

If your injector size is increasing your using more fuel faster so you need a higher fuel rail pressure to maintain constant pressure at all the injectors. If your dumping fuel faster than your pump can pump it to the fuel rail (meaning outside the efficiency range of the pump) then you will never have full pressure in the rail and fluid dynamics go out the window.

I know that some of you are going to flame me but i find this to be a interesting subject.
I thought i would throw some stuff out there and spark a good conversation.

 

wow , um no flame here but that does make sense , but people gave me crap cause i asked about our fuel pumps and they were saying ours are good for 350 hp , but ive been on here for about six months and i have never seen a sssc over 300 hp so how are we going to know how high our fp's can go

 

Exactly!!
Alot of people on this site believe everything they read.Most of the people on this site who have popped there number 4 had a smaller pulley and a shitty tune.Very rarely have you seen a stock car or a stage 2 fry a #4 piston.Sure it has happened,but its very uncommon.There are also rumors that the intake manifold is causing these problems.Its not that its getting too little fuel,its getting too much air.Do you see the srt4 crowd all upgrade to a return style fuel system at 250 hp?No,theres no need to.There are plenty of them putting down 400+ hp on the stock fuel system.

 

pascal's law is also an ideal law, using ideal parameters...also the SRT-4s are running cooler intake charges from the turbo then we are also in theory we use the gas as a cooling agent almost like the meth injection

 

Actually, everything was done in 1 day. I help my mechanic during the whole process.

I tapped the fuel rail the same way as the cavalier fuel rail. I went to a dyno and setup a AFR of 10.8. Still up to today, no problems.

 

::sigh::
it's not fuel starvation. you can believe what you want too.

 

alot of it is poor tuning, to extreme of a tune and a combo of horribly beating the **** out of your car. high iat2's make the piston's pop, just look at the turbo guys well inot 320~350 whp and not a hiccup.

btw twincharging your car is a complete waste of time just go turbo if your doing all that work already.

 

Are you saying that pascals's law only applies in a perfect world?
I would have to say thats a incorrect statment, our cars use this law every day, every time you push the gas pedal or the brakes.

Pascal's Law is not only used with ideal parameters.
If my fuel rail pressure at #1 is XXpsi then #4 should not be to far off ( constant through out the rail ) as long as the fuel pump is inside its eficiency range.

 

since i am man enough to admit when i am wrong i will...I was thinking of avagadro's law which is pv=nrt instead of pascals that is ^p=pg^h

 

One reason I choose to install a return-style since I'm looking for high HP, and of course changed the fuel pump.

 

Its all good man this is a great conversation i look forward to continuing it.

 

i can never remember all the gas laws, Pchem wasnt my strongest part but Ochem sure as hell was

 

yeah there is a lot to remember

 

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