New Product: High-Flow Billet Fuel Rails
05-13-2009, 08:59 PM
#16
Three Wheelin'
Join Date: Dec 2005
Location: In the boatyard installing the mast and engine, we don't need a crane, we harness the mesquito's! Yeah!
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Besides from looking shiny, I am curious why this would be any improvement to any car. Of course, if you completely block any pipe you're going nowhere, I'll grant you that (save the return line, but that won't be good for the fuel pump). But the flow through any realistically sized injector (or 8 of those combined) will most definately be magnitudes smaller than what can flow through that seemingly kinked pipe.
These cars drink gas like I drink beer, but that pipe is similar to a beertap and at 2,5 bars pressure that flows enough for me
These cars drink gas like I drink beer, but that pipe is similar to a beertap and at 2,5 bars pressure that flows enough for me
25 year old cleaned - or new... no brainer....
The missing component is the rails - and yes - I'll be joining the boostards club this year x 2 - and as many are aware - machining for one is one heck of a lot more expense in time then materials.... Thank you Carl!
BTW - Pyrats drink rum at the same rate you young'n drink beer.....
05-13-2009, 11:48 PM
#17
Administrator - "Tyson"
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Nice rails!!!! Would be a nice upgrade for the 16V cars to make a jump to clip on injectors easier.
The #1 restriction in the stock fuel system is the check valve at the fuel pump. Every drop of fuel your car drinks is being pushed through a pin-hole back at the pump.
I would like to see a new, larger check valve to replace the stock one. The bends and the injector hole are insignificant compared to the check valve. Which has a smaller hole than one of the injector holes in the stock rails.
The #1 restriction in the stock fuel system is the check valve at the fuel pump. Every drop of fuel your car drinks is being pushed through a pin-hole back at the pump.
I would like to see a new, larger check valve to replace the stock one. The bends and the injector hole are insignificant compared to the check valve. Which has a smaller hole than one of the injector holes in the stock rails.
05-14-2009, 06:20 AM
#19
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Here in proper beerdrinking country us 'young'ns' (25?) put the tap pressure to 2.5 bars, not that manual pumping ****e in england or low pressure stuff in the US. Fills a glass in about 3 seconds, can you keep up with that? 
05-14-2009, 06:29 AM
#20
Carl one thing I don't understand and what my thinking is at present is that the retaining system of the fuel injectors with the stock system is superior. I hope I am wrong as I would like a set on the stroker. The reason I say this is that the stock system locks the injectors in place via the clip. It is really locked too, it doesn't move. Now if the system you are using relies on the holding down of the injectors hard against the manifold means that me be a little worrying. You would have expansion to consider and if there is a certain amount of free play then they could move up and down with the variance of the fuel pressure. This I wouldn't think would be a good thing. When I made my fuel rails I had to weld on new fuel injector retainers as the injectors I used were different to the Porsche ones. Without that the injectors were still locked down but they moved, I didn't like that. Ready to be educated. Greg
05-14-2009, 08:39 AM
#21
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05-14-2009, 11:47 AM
#22
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Greg,
That is a valid concern, and believe me - we were concerned with it to if only because of the possible liability caused by a fuel leak and engine fire.
However - many fuel rails do not carry clips in them, and those that do not have solid bolt-downs so the rail cannot be blown up off of the seats. That is what we have done here.
The reason the stock rails have the clips is so the injector does not drop down.... it actually floats above the bung in the manifold slightly. Try this: remove one injector clip between the injector and the stock fuel rail, and press down (hard) on the injector. You will be surprised how far they fall before hitting bottom.
Myself, I have seen fuel leaks when someone THOUGHT they had the clip in right but they didn't, and the injector with a new, very pliable o-ring was allowed to drop, exposing the o-ring at the top and creating the leak.
This system is more positive, no clips (which we have seen can provide the illusion of security) and the injectors are not allowed to climb or descend more than the amount of the o-ring travel in the bung.
I am not saying we clamp the injector in there tight - that would be bad. Because of the expansion characteristics of the magnesium alloy and the aluminum heads below, some room beneath the injector is required to be there.
We have tested this design at full drop and full rise to make sure the o-rings never become uncovered.
Thanks for your question.
That is a valid concern, and believe me - we were concerned with it to if only because of the possible liability caused by a fuel leak and engine fire.
However - many fuel rails do not carry clips in them, and those that do not have solid bolt-downs so the rail cannot be blown up off of the seats. That is what we have done here.
The reason the stock rails have the clips is so the injector does not drop down.... it actually floats above the bung in the manifold slightly. Try this: remove one injector clip between the injector and the stock fuel rail, and press down (hard) on the injector. You will be surprised how far they fall before hitting bottom.
Myself, I have seen fuel leaks when someone THOUGHT they had the clip in right but they didn't, and the injector with a new, very pliable o-ring was allowed to drop, exposing the o-ring at the top and creating the leak.
This system is more positive, no clips (which we have seen can provide the illusion of security) and the injectors are not allowed to climb or descend more than the amount of the o-ring travel in the bung.
I am not saying we clamp the injector in there tight - that would be bad. Because of the expansion characteristics of the magnesium alloy and the aluminum heads below, some room beneath the injector is required to be there.
We have tested this design at full drop and full rise to make sure the o-rings never become uncovered.
Thanks for your question.
11-30-2009, 03:28 PM
#25
Developer
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I favor the Aeromotive fuel regulators. Using one now with the Electromotive Tec GT kit.
It replaced all the original fuel regulators and the dampener and the FMU.
This photo is from the instructions for our soon-to-be-released Stage 3 kit.
It replaced all the original fuel regulators and the dampener and the FMU.
This photo is from the instructions for our soon-to-be-released Stage 3 kit.
11-30-2009, 04:49 PM
#26
Man of many SIGs
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I did not have the need to flowbench the billet fuel rails as 0.5" ID aluminum fuel rails are very common on other muscle cars and can supply 800 HP+ every day of the week. So we knew they were more than wee needed, and thats all I needed to know.
As to adding more threaded bungs.... easy stuff. Drill and tap where you want them to be. There is a lot of material in these to work with.
As to adding more threaded bungs.... easy stuff. Drill and tap where you want them to be. There is a lot of material in these to work with.
11-30-2009, 06:41 PM
#28
Developer
Thread Starter
You are right, Fabio. AN system is in 16ths.
And the term -6 refers to the fittings on the end. Not the bore size.
The bore within the fuel rail is 1/2" The fittings are smaller than the bore (necessarilly so)
And the term -6 refers to the fittings on the end. Not the bore size.
The bore within the fuel rail is 1/2" The fittings are smaller than the bore (necessarilly so)
