Looking for information on rising rate regulators, not the adjustable fixed-rate units.
Thanks
ST
Our stock ones are Rising Rate. 1:1
Many are using SX regs which are also rising rate 1:1. You have to use a 1:1 on a FI car otherwise your fuel pressure would not rise with plenum pressure and you would run out of fuel.
91VR4-3.0L-Stock heads and Cams-835AWHP 747AWTQ Daily Driver 10.31@142mph on street tires
SLTT-10.9 @ 142MPH Stock NA engine and NA heads/Cams
T4 AWD 9.21 @ 154.98 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T2 FWD 10.19 @ 140.31 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T4-159.23 MPH Ran on 6G72 3.1L! (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T4-995AWHP Uncorrected 6G72 3.0L C16 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
T2-820FWHP 3.1L 27psi C16 (Chris Hill Driver/Builder/Tuner Car Owned by 3SX)
the adjustable ones are also rising rate because you attach a vacuum hose to them
i set mine at the 43psi or whatever at idle, and the vacuum line brings it up under boost
works the same way as a stock one, except obviously if you have different fuel/engine setups you can change pressure instead of having a fixed spring pressure like stock, and you can fit larger fuel lines through the better pressure regulators
OK, a rising rate fuel pressure regulator steps up the fuel pressure at a greater ratio proportional to increased vaccum or boost (typically). So you have an OEM idle, but as demand on the engine increases it hikes the pressure at a greater rate than the baseline vacuum or boost signal...so your richer at higher demand.
For more info, you can look at Performanceproducts.com (For Porsche applications), search for FSE Boost Valve (primarily in UK due to emissions regs in US) or Cartech tuning.
OK, a rising rate fuel pressure regulator steps up the fuel pressure at a greater ratio proportional to increased vaccum or boost (typically). So you have an OEM idle, but as demand on the engine increases it hikes the pressure at a greater rate than the baseline vacuum or boost signal...so your richer at higher demand.
For more info, you can look at Performanceproducts.com (For Porsche applications), search for FSE Boost Valve (primarily in UK due to emissions regs in US) or Cartech tuning.
Stock FPRs are rising rate. a 1:1 rising rate. You can also have a higher rise rate of 2:1 or 3:1 but they are all rising rate FPRs.
regardless...never heard of anyone using them on our cars at all
Huh? Like I stated twice, it IS what is used in our cars. It is what is in every TT car from the factory. A 1:1 Rising rate FPR. As are the aftermarket ones like SX Performance that we replace the stockers with, 1:1 Rising rate FPR. They are nothing new and we (FI) all have them.
I was wondering this myself. But from what I have seen it doesnt seem to many people use them around here. Most people who use them seem to be those with other platforms who have NON Forced Induction ECUs from the get go and use them for safer tuning... or those who just like running really rich under boost. Most people here tune via the standard 1:1 ratio with little problems... but maybe the FMU could be an asset to our cars... especially for those keeping stock injectors and do NOT wish to swap them... but wish to run higher boost With the FMU you could in theory run say 100psi or more under full boost, and your 360cc injectors would act as a bigger one... perhaps over 500cc... there are calculations to figure that all out tho. Most people just opt for bigger injectors and 1:1 rising rate regulators. Youre call.
Rob
Quote:
Originally Posted by SMTCapeCod
Is anyone using one, and how is it working out?
Looking for information on rising rate regulators, not the adjustable fixed-rate units.
I was wondering this myself. But from what I have seen it doesnt seem to many people use them around here. Most people who use them seem to be those with other platforms who have NON Forced Induction ECUs from the get go and use them for safer tuning... or those who just like running really rich under boost. Most people here tune via the standard 1:1 ratio with little problems... but maybe the FMU could be an asset to our cars... especially for those keeping stock injectors and do NOT wish to swap them... but wish to run higher boost With the FMU you could in theory run say 100psi or more under full boost, and your 360cc injectors would act as a bigger one... perhaps over 500cc... there are calculations to figure that all out tho. Most people just opt for bigger injectors and 1:1 rising rate regulators. Youre call.
Rob
That would be very bad. You do not want to run injectors intended for a base pressure of 43.5 at 100PSI.
First off that was an example and second off how do you know? It is done all the time... it seems to me you have very limited knowledge on this topic all together by your prior responses.... just because it isnt ideal or the norm doesnt mean it is bad or not gonna work. Many other platforms use this method... we just dont because I guess nobody knows its possible and think 1:1 is all thats out there and no reason to deviate. It WORKS fine, maybe not atomized as ideal as it would or could be.... but nevertheless it is completely feasible. I have heard of people running as high as 120psi across their injectors using FMUs with no ill effects aside from more fuel.
Rob
Quote:
Originally Posted by Imp Pwr Online
That would be very bad. You do not want to run injectors intended for a base pressure of 43.5 at 100PSI.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Rising Rate Fuel Pressure Regulator
With the FMU you could in theory run say 100psi or more under full boost, and your 360cc injectors would act as a bigger one... perhaps over 500cc... there are calculations to figure that all out tho. Most people just opt for bigger injectors and 1:1 rising rate regulators. Youre call.
