| Message | There is absolutely no benefit, particularly if you're already set up to run 555's. This type of regulator would require a VERY custom tune, as the open loop portion of the map would be completely wrong for a 4:1 regulator. You'd probably need an aftermarket fuel pump as well, since pump output decreases with pressure. In the end, once you had it all sorted out, it would run the same as it does now. Why bother?  
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