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i have 2001 car. with racetronix 255lph and hotwire kit. planning to turbo the car and make 550-600hp. im looking into 340lph pump and corvette regulator. what else do i need to change? reading some things on bulkhead connector?
What size injectors do you have currently? You will most likely need to upgrade those as well. Bulkhead connectors are for running hoses cleanly through a bulkhead, so you don't just cut a hole and then run a hose through it, which can lead to chafing of the hose and leakage over time.
The upgraded Racetronix bulkhead connector that comes supplied with the 99-2002 model years Racetronix kits (single or dual) is more than adequate to handle the voltage/amp requirements of a single 340.
You can also buy it as a single item. It's plug and play. About $10. It can handle up to 30 amps on two of the four fuel side pins on the connector. It is a modular style plug on the atmosphere side. Pretty sure you have to remove fuel assembly to change the connector.
It's the small yellow bulkhead connector on the 1998 model year that can't handlle the amps requirements of BA pumps larger than a 340. I recall the amp requirement of the Racetronix 340 is 14 amps.
You might have to change to a different style fuel regulator such as the combination Corvette external filter/regular in order to maintain a static 58 psi with the larger than stock 340 lph pump. Your intank fuel pressure regulator is getting old. It might not be able to manage the additional volume and pressure of the 340.
The upgraded Racetronix bulkhead connector that comes supplied with the 99-2002 model years Racetronix kits (single or dual) is more than adequate to handle the voltage/amp requirements of a single 340.
You can also buy it as a single item. It's plug and play. About $10. It can handle up to 30 amps on two of the four fuel side pins on the connector. It is a modular style plug on the atmosphere side. Pretty sure you have to remove fuel assembly to change the connector.
It's the small yellow bulkhead connector on the 1998 model year that can't handlle the amps requirements of BA pumps larger than a 340. I recall the amp requirement of the Racetronix 340 is 14 amps.
Be aware that with forced induction the static pressure output of the stock intank fuel pressure regulator will go lean on boost because the stock regulator stays static at 58 psi. You need more pump volume and pressure when making boost. At 15 lbs of boost your fuel pressure has to raise from 58 psi up to 73 psi.
I'm told that the 340 doesn't always play well with the Corvette fuel pressure regulator. Some people have good luck with it, some find that the regulator can't bypass enough fuel to keep the output pressure in spec. Apparently it's right on the threshold of what the stock regulator can handle.
I'm told that the 340 doesn't always play well with the Corvette fuel pressure regulator. Some people have good luck with it, some find that the regulator can't bypass enough fuel to keep the output pressure in spec. Apparently it's right on the threshold of what the stock regulator can handle.
Agree - but a few don't do the research to completely understand that with forced induction you need a Fuel Pressure Regulator that adjusts pressure and volume based on boost when making boost. When making boost the intake becomes pressurized. As a result the FPR adjusts pressure and volume to compensate for the boost pressure in the intake manifold pushing against the tip of the injector(s). As fuel pressure increases fuel volume decreases as well. IMO the OP should use an adjustable FPR.
When NA and not making boost, you need less pressure, because of vacuum in the intake. Because the stock regulator maintains a static 58 psi at all times, the values in the IFR table account for the changes in vacuum as the engine goes from idle to WOT. Once boost overcomes vacuum, the stock regulator doesn't adjust to meet the additional fuel required when making boost.
The Corvette fuel pressure regulator is static at 58 PSI and should not be used with boost - IMO. But there are naysayers who will argue otherwise.
340lph 
