ThrottleVault Engine Tools

Build Your Combo

Dial in your engine combination. Enter your specs and get real-time HP estimates, fuel system requirements, and component recommendations.

⚙
Engine Configuration
Engine Config
Camshaft
Cylinder Heads
Aspiration
Est. Peak HP
—
horsepower (crank)
Est. Peak TQ
—
ft-lbs (crank)
Peak Power RPM
—
RPM range
Peak Torque RPM
—
RPM range
Req. Injectors
—
lb/hr (@ 80% duty cycle)
Fuel Pump Req.
—
GPH (with 20% margin)
AFR Target Windows
Condition Target AFR Richness
Idle 14.2 – 14.7
Cruise 14.7 – 15.5
WOT 12.5 – 13.0
Start / Warmup 12.0 – 13.5
⛽
Fuel System Requirements
Max fuel flow (at peak HP) — lb/hr
Recommended injector size — lb/hr
Fuel pump minimum — GPH
BSFC estimate —
⚠ High fuel demand detected. Returnless fuel systems may be insufficient above 190 GPH. Consider an in-tank high-flow pump with a dedicated return line.
Power & Fuel Curve
Fuel Flow (lb/hr)
Est. HP

The Sodium Advantage 🔥

Understanding sodium-filled exhaust valves and why they matter for your build

What Are Sodium-Filled Valves?
  • Hollow-stem exhaust valves partially filled with metallic sodium
  • Sodium melts at 208°F, becoming liquid coolant inside the stem
  • Liquid sodium sloshing with engine vibration transfers heat from the hot valve head up through the stem and into the valve guide
  • Reduces exhaust valve temperatures by 200–300°F
  • Critical for valve longevity on high-heat applications
  • Standard on OEM factory turbo and high-output engines for decades
Operating Temperatures
Application Exh Valve Temp Heat Level
Stock NA street 1,000–1,200°F
Performance NA 1,200–1,400°F
Mild Boost (<15 PSI) 1,400–1,600°F
High Boost (>15 PSI) 1,600–1,800°F+
With sodium-filled exhaust valves: reduce all values by 200–300°F
⚠
Sodium-Filled Exhaust Valves Recommended
At your boost level, exhaust valve temperatures will exceed 1,400°F during sustained WOT. Solid-stem valves under these conditions accelerate seat recession and can cause catastrophic valve failure. Sodium-filled exhaust valves are strongly recommended for any boosted application.
Stem Diameter
5/16" & 8mm
Sodium Fill
40–60% Cavity
Max Valve Head Temp
1,800°F
Heat Dissipation
3× Faster

Shop SBI Valvetrain For Your Build

Quality valvetrain components matched to your combination

🔩
SBI E-LOY Sodium-Filled Exhaust Valves
Hollow-stem sodium-filled exhaust valves in E-LOY high-temperature alloy. Proven on OEM turbo engines and built for performance aftermarket. Available in 5/16" and 8mm stems.
Shop Now →
🌀
SBI High-Performance Valve Springs
Matched valve spring sets rated for your cam's lift and RPM target. Single, dual, and beehive profiles available. Correct installed height matters — don't skip this step.
Shop Now →
🔧
SBI Hardened Valve Guides
Phosphor-bronze and iron valve guides for both intake and exhaust. Essential when running unleaded fuel long-term, or when upgrading to larger-stem valves.
Shop Now →
⚡
SBI Roller Rockers
Full-roller rocker arms reduce friction, run cooler, and improve valve actuation precision. Stamped steel factory rockers are the first thing to upgrade when going beyond stock lift.
Shop Now →

Encodes your configuration into a shareable URL

Build link copied to clipboard!