Many people ask how much power AuxJection can support on a stock camshaft.
Here’s a real-world example from our buddies at Twin Cities Performance.
The Setup
Vehicle:
2017 Camaro ZL1 (A10)
Modifications:
- AuxJection
- Kong X-Ported LT4 Supercharger
- 103mm Throttle Body
- Long Tube Headers
- Flex Fuel
- Low Side Auxiliary Fuel Pump
The Results
861 whp / 805 lb-ft on a stock camshaft
861 whp / 805 lb-ft on stock cam — AuxJection equipped LT4
Dyno sheet above shows the results.
Fuel System Insight
At this power level, the system was utilizing approximately 85% of AuxJection at ~70 psi low side fuel pressure.
This indicates there is still additional fueling capacity available beyond this power level.
Why This Matters
- Most LT4 setups don’t run out of blower — they run out of fuel
- AuxJection extends that limit while maintaining proper distribution
- This allows higher power levels without relying solely on direct injection capacity
This is currently the highest horsepower we’ve seen on a stock camshaft using AuxJection.
Think you can beat it? We’re always open to new records.
Looking to push your setup further?