Hey Ben, you can get boost dependent fuel pressure regulators at many speed shops. Below is a copy of promo material from Cartech, one of the companies I respect, that specializes in aftermarket turbo conversions and fuel systems. Cartech uses the term rising rate fuel pressure regulator (RRFPR) for their design which I find attractive. Check them out, they have other fuel press regs too.
Cartech can be accessed via http://www.cartech.net/index.html
Fuel Pressure Regulators
The broad range of tuning capability available with changing fuel pressure has yet to be fully explored. We have pioneered this concept with the introduction of the rising rate fuel pressure regulator. It has been created for the purpose of increasing the fuel flow through electronic fuel injection systems when conditions of engine load demand more fuel. Unique to the concept of the rising rate regulator is that the pressure only increases when needed then returns to stock. This concept does not keep the fuel pressure up all the time, it just gives the system a correct mixture some of the time.
The concept of the rising rate regulator is particularly useful in three circumstances:
1. The factory turbo/supercharger car when the stock boost pressure is increased.
2. An aftermarket turbo/supercharger system applied to an EFI equipped car.
3. A normally aspirated EFI car with modifications that increase the air flow.
These regulators are unique in the adjustability of the rate of gain as well as the onset of gain. The potential for increasing fuel flows is very large, with as much as 40% more fuel available. The user/installer will find these regulators have far more potential for increasing fuel flows than microprocessor changes or additional injectors. Further, they are less expensive and tunable. The installer will also find they are very user friendly products. Installation and tuning are quite simple. The regulator installs in the EFI return line after the stock regulator and overrides the stock regulator at full throttle or when under boost. One truly unique feature of our design is the ability to begin raising the fuel pressure before getting under boost. The ability will tune out the inherent turbo/supercharger lean flat spot at the onset of boost.
Car 20002 For factory supercharged or turbocharged engine w/ EFI $209.00
Car 20003 For normally aspirated engines w/ EFI $209.00
Car 20005 For aftermarket supercharged or turbocharged engines w/ EFI $209.00
Car 20007 Same as the 20005, but with a #6 in/out fitting for big fuel pumps $209.00
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Fancy Fuel Press Reg for Ben
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