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Adjustable fuel pressure regulators allow you to get the most out of any investment you have made in power-adders for your Porsche. Anything that you have done to your 928 that has increased air flow through the motor like an exhaust mod, cat-delete, head, cam, or valve mods, or a supercharger - may have left some HP on the table unless you also added in a bit more fuel pressure too. While this is true for both LH-Jet cars and L-Jet cars, it is especially true for the L-Jet cars as they do not have the MAF nor the computer to increase injector on-time with increased air flow like the LH-equipped cars do.
Our adjustable fuel pressure regulators are a bolt-in swap for the stock Bosch Regulator. We have models in stock to replace Bosch 0 280 160 215 and Bosch 0 280 160 297.
The diaphragms are made with two 3-layer fluoroelastomersand designed for use with gasoline and ethanol and alcohol.
I have them priced below the stock regulators at $282.50 for the moment, and we have seven of them in stock. First come, first served!
Interesting, Carl. How would you use them with your L-jet kit? Would they replace the RRFPR that comes with the kit? Are they responsive to boost?
Thanks,
Dave
I'm checking with the engineer who designed it about your question re: how it will respond to boost. I think I know the answer but I want to be sure. I'll get back to you.
Got my answer back: they said it was designed to work with turbo applications and yes, it will respond to boost at a 1:1 rising rate. The FMU that you currently have does allow you to adjust the rate at which the fuel pressure rises, while this one does not. But then again, this one bolts into the stock fuel system without any special plumbing.
Can these be used on an 86.5 and set at the correct pressure but then increased to the pressure on the '87 FPR when going to Porken chips ?
Yes.
Bigger question: Can the 86.5 ones be set at the "factory" to the 87 value by default so I don't have to hook up a fuel pressure gauge? :-)
No. Like most other fuel pressure regulators, they are set to a fairly low pressure at the factory as a default. This is for safety and liability reasons. The technician must dial it in on the car after it is installed.
The range is from 10 to 100 psi. I've been selling these for more than a year - I will ask those customers to send in some pictures of their installs.
The reason I posted is I know the 88-95 regulator has become hard to find for 928 owners, and I wanted to tell you guys I had these in stock. They are beautifully made, as you said.
The range is from 10 to 100 psi. I've been selling these for more than a year - I will ask those customers to send in some pictures of their installs.
The reason I posted is I know the 88-95 regulator has become hard to find for 928 owners, and I wanted to tell you guys I had these in stock. They are beautifully made, as you said.
So, we use a liquid filled fuel pressure gauge mounted to the fuel rail to dial in the correct fuel pressure?
The range is from 10 to 100 psi. I've been selling these for more than a year - I will ask those customers to send in some pictures of their installs.
The reason I posted is I know the 88-95 regulator has become hard to find for 928 owners, and I wanted to tell you guys I had these in stock. They are beautifully made, as you said.
11-11-2019, 05:10 PM
Adjustable 928 Fuel Pressure Regulators in stock.
