New Product: High-Flow Billet Fuel Rails
05-13-2009, 12:55 PM
#1
Developer
Thread Starter
New Product: High-Flow Billet Fuel Rails
New Billet Aluminum Fuel Rails and Lines for most Porsche 928
Application: 1987-1995 32v Porsche 928 all
1984-1986 16v Porsche 928 with LH-Jetronic
1980-1984 16v Porsche 928 with L-Jetronic*
Our billet aluminum fuel rails perform three important functions for you:
Sharp Good Looks: if your fuel rails covers are cracked or missing, if your rails and lines are rusty, or perhaps you have installed our matching aluminum intake manifold spacers – then these billet aluminum fuel rails and lines will finish off an engine bay that you can be proud of. Order them unpolished below if you want to powder-coat or paint them to match your engine paint scheme, or in the high-polish aluminum finish as shown.
Performance: the stock fuel system has a number of serious bends and kinks in the lines (see pictures below) any one of which can restrict fuel flow to the injectors. By upgrading to the 928MS rails and lines, all the restrictions are eliminated assuring full fuel capacity is available to your injectors at any time.
Ease of Maintenance: perhaps you're a serious 928 tuner who has become frustrated with how difficult it is to remove and replace the stock fuel rails when you want/need to. Then you will love our new fuel rail hold-down design – with our special brackets that make it a cinch to take the fuel rails on and off. No more dropping hold-down nuts in impossible places to reach!
928 Motorsports Quality: Expertly crafted from aluminum billet, and milled to a fine finish. Each rail is equipped with -6AN fittings at each end. Flexible fuel lines are stainless steel braid, hard lines are aluminized steel with zinc-plated fittings. Brackets are 6063 aluminum with stainless steel fasteners.
Fitment Notes*:
1987-1995 32v 928: these rails and the rail kit fit without any mods needed to your car.
1984-1986 16v LH-Jetronic: use these rails with the injectors you have. You will only need to make your own hold down brackets and fuel lines.
1980-1984 16v L-Jetronic: use these rails to convert from your early barbed-injector style to the more popular and available Bosch late-model injector. Buy just the fuel rails, you will need to make your own hold down brackets and fuel lines.
Finishes: Order the fuel rail in Satin Finish to match unpolished aluminum, or if you intend to paint the fuel rails. Order polished finish for a bright reflective finish.
Ordering: Note that the fuel rails can be purchased with or without the custom fuel lines. This is so 16v owners can buy the rails and make their own hold-downs and lines. The bare rails will come tapped at each end for NPT fittings. If ordering the complete 32v kit with lines, everything you need is supplied as shown.
Pricing varies with the finish on the rails, and with or without matching fuel lines.
See all prices and options here:
http://www.928motorsports.com/parts/...l_rail_kit.php
Thank you for your interest!
Application: 1987-1995 32v Porsche 928 all
1984-1986 16v Porsche 928 with LH-Jetronic
1980-1984 16v Porsche 928 with L-Jetronic*
Our billet aluminum fuel rails perform three important functions for you:
Sharp Good Looks: if your fuel rails covers are cracked or missing, if your rails and lines are rusty, or perhaps you have installed our matching aluminum intake manifold spacers – then these billet aluminum fuel rails and lines will finish off an engine bay that you can be proud of. Order them unpolished below if you want to powder-coat or paint them to match your engine paint scheme, or in the high-polish aluminum finish as shown.
Performance: the stock fuel system has a number of serious bends and kinks in the lines (see pictures below) any one of which can restrict fuel flow to the injectors. By upgrading to the 928MS rails and lines, all the restrictions are eliminated assuring full fuel capacity is available to your injectors at any time.
Ease of Maintenance: perhaps you're a serious 928 tuner who has become frustrated with how difficult it is to remove and replace the stock fuel rails when you want/need to. Then you will love our new fuel rail hold-down design – with our special brackets that make it a cinch to take the fuel rails on and off. No more dropping hold-down nuts in impossible places to reach!
928 Motorsports Quality: Expertly crafted from aluminum billet, and milled to a fine finish. Each rail is equipped with -6AN fittings at each end. Flexible fuel lines are stainless steel braid, hard lines are aluminized steel with zinc-plated fittings. Brackets are 6063 aluminum with stainless steel fasteners.
Fitment Notes*:
1987-1995 32v 928: these rails and the rail kit fit without any mods needed to your car.
1984-1986 16v LH-Jetronic: use these rails with the injectors you have. You will only need to make your own hold down brackets and fuel lines.
1980-1984 16v L-Jetronic: use these rails to convert from your early barbed-injector style to the more popular and available Bosch late-model injector. Buy just the fuel rails, you will need to make your own hold down brackets and fuel lines.
Finishes: Order the fuel rail in Satin Finish to match unpolished aluminum, or if you intend to paint the fuel rails. Order polished finish for a bright reflective finish.
Ordering: Note that the fuel rails can be purchased with or without the custom fuel lines. This is so 16v owners can buy the rails and make their own hold-downs and lines. The bare rails will come tapped at each end for NPT fittings. If ordering the complete 32v kit with lines, everything you need is supplied as shown.
Pricing varies with the finish on the rails, and with or without matching fuel lines.
See all prices and options here:
http://www.928motorsports.com/parts/...l_rail_kit.php
Thank you for your interest!
05-13-2009, 01:08 PM
#2
Three Wheelin'
Join Date: Dec 2005
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Fantastic Carl - and great timing...
Would these be the perfect fit to upgrade the '85 Euro to ford injectors.?
Would these be the perfect fit to upgrade the '85 Euro to ford injectors.?
May I make 1 suggestion though and make a port for a pressure gauge hookup.
05-13-2009, 02:25 PM
#7
Nordschleife Master
Looks sharp,
There is only 1 thing that I wish to point out. Both Louie and myself had problems with fuel heat. Louie esp so. He concluded that the fuel rails were made the way they were to help prevent heat soak as fuel passing through the stock setup will cool very quickly. Where as these have significantly more mass to have to cool.
Louie covered his with insulation to prevent as much heat transfer as possible. As well he added a temp sensor to the fuel rail which modifies his mixture above that point.
Have you had them on a car and let the car idle for an extended period of time in hot weather? Say Texas mid summer traffic style test.
to see if there is any effects to the AFR, running, and even more so hot start.
There is only 1 thing that I wish to point out. Both Louie and myself had problems with fuel heat. Louie esp so. He concluded that the fuel rails were made the way they were to help prevent heat soak as fuel passing through the stock setup will cool very quickly. Where as these have significantly more mass to have to cool.
Louie covered his with insulation to prevent as much heat transfer as possible. As well he added a temp sensor to the fuel rail which modifies his mixture above that point.
Have you had them on a car and let the car idle for an extended period of time in hot weather? Say Texas mid summer traffic style test.
to see if there is any effects to the AFR, running, and even more so hot start.
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05-13-2009, 07:13 PM
#8
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I am curious: your fuel flow is only really limited by the fuel pressure damper, pressure from the pump (which runs continuously anyway) is more than enough to keep fuel flow at a high enough level with all injectors open.
Increasing the ports to the injectors is fun, but the flow through the injectors is nothing compared to throughput of stock rail to begin with.
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
Increasing the ports to the injectors is fun, but the flow through the injectors is nothing compared to throughput of stock rail to begin with.
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
05-13-2009, 07:53 PM
#9
Developer
Thread Starter
I agree that any NA car does not need to replace the fuel rails as they are not tickling the limits of the flow thorugh the stock rails. For them, this product would be only cosmetic or convenient.
However, there are several of us Boostards that start to see pressure drop to the injectors at certain boost levels as a result of constrictions to the fuel rails, and I am one of those.
However, there are several of us Boostards that start to see pressure drop to the injectors at certain boost levels as a result of constrictions to the fuel rails, and I am one of those.
05-13-2009, 07:58 PM
#10
Developer
Thread Starter
There is only 1 thing that I wish to point out. Both Louie and myself had problems with fuel heat. Louie esp so. He concluded that the fuel rails were made the way they were to help prevent heat soak as fuel passing through the stock setup will cool very quickly. Where as these have significantly more mass to have to cool.
Louie covered his with insulation to prevent as much heat transfer as possible. As well he added a temp sensor to the fuel rail which modifies his mixture above that point.
Have you had them on a car and let the car idle for an extended period of time in hot weather? Say Texas mid summer traffic style test. to see if there is any effects to the AFR, running, and even more so hot start.
Louie covered his with insulation to prevent as much heat transfer as possible. As well he added a temp sensor to the fuel rail which modifies his mixture above that point.
Have you had them on a car and let the car idle for an extended period of time in hot weather? Say Texas mid summer traffic style test. to see if there is any effects to the AFR, running, and even more so hot start.
But no, I have not had a 928 with these rails idle for an extended period in Brownsville TX. Vapor lock? Its a possibility.
I have, however, been driving these rails around on my 928 SC daily in WI without a problem.
05-13-2009, 08:09 PM
#11
Three Wheelin'
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Hi CARL 
Have you got any actual flow figures for normal rails and your new ones ??
As I run 8 extra Venom injectors for my Nitrous (from front of both rails) I may need some of yours...
Although I have a cabin fuel pressure gauge in my Race controller run from A Transducer on the front port on the drivers side rail (UK side) and have never noticed a drop in pressure so far, but I think I better look a little harder now lol.
All the best Brett
Have you got any actual flow figures for normal rails and your new ones ??
As I run 8 extra Venom injectors for my Nitrous (from front of both rails) I may need some of yours...
Although I have a cabin fuel pressure gauge in my Race controller run from A Transducer on the front port on the drivers side rail (UK side) and have never noticed a drop in pressure so far, but I think I better look a little harder now lol.
All the best Brett
05-13-2009, 08:14 PM
#12
Three Wheelin'
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Hi Carl
Just had a closer look at the your 16v rails...for mine I would need 2 extra outlets as at the moment my Venom Nitrous injectors use the fuel gauge outlet on one rail and I have drilled/tapped the other rail to match...if thats Aeroquip you are using is there a DOUBLE adaptor available for the U piece at the front of each fuel rail, and if so any idea how much 2 of them would add to the 16v kit please ?
All the best Brett
Just had a closer look at the your 16v rails...for mine I would need 2 extra outlets as at the moment my Venom Nitrous injectors use the fuel gauge outlet on one rail and I have drilled/tapped the other rail to match...if thats Aeroquip you are using is there a DOUBLE adaptor available for the U piece at the front of each fuel rail, and if so any idea how much 2 of them would add to the 16v kit please ?
All the best Brett
05-13-2009, 08:22 PM
#13
Developer
Thread Starter
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.
05-13-2009, 08:33 PM
#14
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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.
Lolll only 800
I am looking for flow for 1350 please
Sorry couldn't resist...hehe
Assuming those rails are circular...I would prefer end doublers rather than drill/tap ....
How much does the aeroquip fuel lines add to the kit?
All the best Brett