Question: Could someone tell me what a rise rate regulator is.TIA
05-03-2000, 07:04 AM
#2
You mean a fuel rising rate regulator? If so, it is a secondary fuel pressure regulator installed
nominally behind the stock unit. What it does is increase fuel pressure when boost (or air pressure) is sensed, as opposed to the stock unit (of an Audi) which senses only full vacuum and 0 vacuum to change the fuel pressure from ~3.5 bar to 4.0 bar. A rising rate is when you want to get even higher pressures, 5,6 to the limit that the fuel pump can supply. It is also adjustable.
05-03-2000, 07:19 AM
#4
Yes. a FPRRR nominlly costs $250. If your goal is to just increase the fuel pressure slighlty due
to higher boost pressure (on a 1.8T) then a 5 bar is the way to go. FPRRR's are nominally used in aftermarket turbo, superchargers or race purposes. They are then coupled to high rate fuel pumps and higher performance fuel injectors. Oh yeah, better fuel lines too, and a fire extinguisher just in case 
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