Hi chaps, Few posts in last few weeks re fuel pressure, here is one version of the correct instrument to measure it, this one doesnt have an oil filled meter movement so it will jostle and shake by feedback from the pump and the injectors.The better one to get has oil in it to dampen the shakes. small_DSC06030.JPG (http://www.calaisturbo.com.au/attachment.php?attachmentid=18177&d=1186504067) The left port goes to fuel rail, easiest place is off a 'T' piece between outlet of fuel rail - or rather where fuel rail connects to regulator. The right port goes to the manifold *after* the throttle valve, best place is off a 'T' piece between manifold and the sense port on regulator. Note: For a properly tuned engine, the computer's maps rely on a fixed pressure across the injector and a differential pressure gauge is the only way to test this with some consistency. If you only measure fuel pressure with an ordinary pressure gauge then it "appears" as if the pressure goes up giving the wrong impression the regulator is a "rising rate"... Some people have suggested there are "rising rate" regulators with gauges that measure the injector pressure and "show" it rises as the throttle is opened. If the regulator is a standard type then the gauge might well show that - but the factory one does that anyway so this implies some error at best or some deception at worst. Anyway, I am looking to find a pressure regulator that has a genuine differential pressure gauge built-in *and* a selectable rising rate ratio control which operates from some base selectable pressure. By the way a 10% increase in pressure doesnt result in 10% more flow, I think its a square root relationship (ie 10% more pressure gives 2.4% more flow) but I'm not 100% sure, though it is rather less than 1:1 ratio. The VL/VLT factory setup expects to see 250.1 Kpa across the injector during all types of running - only exception is during hot cranking starts for a few seconds to reduce chance of vapour lock. Pressure regulators for VL and VLT have same operation but might have different mounting bracket. If I can find a regulator with built in differential gauge then I'm selling the one pictured in the attachment, Happy to reply to comments and answer questions on fuel pressure here. Edit: I'll be adding pictures and diagrams later on so I can refer to this when the subject arises from to time, I might also amend the grammer and fix typos from time to time because "I'm that type of guy" Some original photos have not been recovered yet.

hahaha, yeah ive seen some of those threads aswell mike, anyway you'll have to keep us updated on your progress in the hunt for a true rising rate reg. cheers matt.