Follow
the photos through a modern nitro fuel system. The featured fuel system
looks to be from the early to mid-nineties. While the components have
changed in appearance, their function and placement are the same today
as they were when this system was in vogue. Understanding where the components
are, and what they do is an important part of accurately reproducing a
scale replica of any subject. |
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| The orange arrow indicates the inlet end of the fuel
pump (pictured is a dual feed "Nuclear" pump). The line that feeds into it comes directly from the fuel tank. Generally, the main fuel line is a hard line, meaning that it is a length of pipe. |
From the pump, two main fuel lines continue from the pump to the barrel valve. Here, excess fuel is diverted back to the tank out the bottom of the barrel valve (blue arrow). |
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| This side view of the barrel valve shows the two main fuel lines (orange arrow), and the return lines (blue arrow). | This shot illustrates the manifold (circled) where the two return lines merge into one to return to the top of the fuel tank. |
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| The line from the rear of the barrel valve continues to the rear of the blower to... | The top of this fuel block. From here, the fuel is distributed to the intake ports (red circled--duplicated on opposite side of block), the nozzles in the heads (green arrows), and the fuel block mounted on the injector hat (yellow arrow). |
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| Following the yellow arrow, we have the injector distribution block mounted to the rear of the hat. Fuel is distributed via this block (blue circle--again duplicated on the opposite surface of the block) to the base of the hat. It is important to note that while three lines feed each side of the base of the injector hat, the fourth feeds into the top rear of the blower (green arrow). Also note the location of the manifold injector nozzles (red circle). There are four of these on each side of the manifold, and they feed into the intake runners. |
Another shot of the main fuel distribution block.
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An overview of the fuel blocks and lines.
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A good view of the hat injector lines. While the lines here are rubber, they could just as likely be rigid steel tubing or braided steel or nylon. Also note, in this photo, the hat restraint plate and straps, as well as the lack of a blower blanket, which is required for all supercharged fuel cars. |
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| We've provided this image for another reference on the barrel valve. This one looks like a Pete Jackson valve. It's a pretty simple shape, and an easy scratchbuild--much simpler than scratching an Enderle, which for a dual pump setup would require two! Click this photo for a larger view of the barrel valve. | This image provides a good view of the configuration of the distribution blocks, the manifold nozzles and the hat nozzles. Click it for a bigger view. |
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