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Bartrim, Todd wrote:
Hi Ernest;
You will need to run your fuel pressure higher to ensure the fuel in the rails doesn't flash to vapour. This can be compensated for with your tuning of the EC2, however it becomes a little more difficult to achieve a smooth idle. You'll want to avoid the high flow injectors when running at a higher pressure.
Thanks, Todd.
People on the list have had enough problems with high flow injectors that I want even be going there. Without a turbo, there just isn't any way to over tax a moderate injector, so what's the point in causing myself more headaces 8*)
Now as for the fuel flashing. Is this really a concern? Insulated fuel rail. Only 40second to absorb enough heat to flash. Unlike the typical nightmare scenario Paul encountered where the engine runs fine down the runway, only to die with the wheel come off the ground, flashing fuel in this case will cause IMMEDIATE problems. Except for shutdown, which I've covered adequately, I think, the worst case for heat soak will be long taxis. The fuel that would flash would be that portion that is next in line to be injested. You would see the rough running during the taxi. Once you start down the runway, you'll get the benefit of :
1)blast air over the fuel rail
2)air moving through the cowl
3) increase fuel flow (moving out the hot, and pulling cold fuel into the line).
Al, could you tell us how long you could have before fuel would flash inside a rail insulated with a 1/4" layer of insulation?
BTW, I just read somewher that those pool toy, foam tube things are impervious to fuel. Made out of the same stuff as plastic fuel tanks. Use 1/4" tube for rails, slip them through a piece of this stuff and wrap with a layer of glass to protect the foam.
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