The FueLab 51505 is a billet-aluminium 515 Series carburettor fuel pressure regulator with two -AN10 inlet ports and a -AN6 return, built for very low pressure applications from 1-3 PSI (0.07-0.21 Bar).
Overview
The 51505 is Fuelab's low-pressure carburettor regulator, sharing the same -10AN/-6AN housing as the 51501 and 51503 but fitted with a low-pressure spring/seat combination for applications needing single-digit PSI. It's built to order across a range of seat and spring configurations - this listing is the 1-3 PSI (-1-L-L) configuration.
Specifications
- Application: CARB
- Minimum Pressure: 1 PSI / 0.07 Bar
- Maximum Pressure: 3 PSI / 0.21 Bar
- Inlet Port Size: 2 x AN10
- Return Port Size: AN6
- Gauge Port Size: 1/8" NPT
- Construction: Billet aluminium, anodised to MIL-A-8625 Type II
- Fuel Compatibility: Petrol, diesel, methanol, and ethanol
- Warranty: Limited lifetime warranty
Key Features
- Very low 1-3 PSI adjustment range for sensitive carburetted applications
- Two -10AN inlet ports and one -6AN return port
- Fine thread pitch for precise pressure adjustment
- Includes mounting bracket and stainless steel hardware
- 1/8" NPT gauge port with plug for an external pressure gauge
- 1/8" NPT pressure reference port with barbed fitting
How It Compares
Need a higher carburettor pressure range in the same housing? See the FueLab 51503 (4-12 PSI). Running EFI instead? See the FueLab 51501 (25-90 PSI).
FAQ
What does the "-L-L" in 51505-1-L-L mean?
It identifies the specific low-pressure seat/spring configuration Fuelab uses on the 51505 to hit the 1-3 PSI range - the 515 body is built to order across several pressure configurations.
Can I use this on an EFI fuel system?
No - 1-3 PSI is far too low for EFI. Use the FueLab 51501 (25-90 PSI) instead.
