Why your
Автор: Hillbilly Garage1215
Загружено: 2025-08-17
Просмотров: 162
Join the Hillbilly Garage team as they take their 6.4 HEMI truck, Old Red, on the road to collect tuning data and improve towing performance. After past overheating issues, they’ve made key upgrades—removing the MDS, installing a new cam and lifters, and working with HP Tuners to dial in the PCM.
In this video, they put the truck to the test while monitoring fuel, spark, and temps:
✅ Discovering why 87 octane causes spark knock and timing pull, while 94 octane makes a big difference.
✅ Tracking oil, engine, and transmission temperatures—and why an oil cooler is the next upgrade.
✅ Troubleshooting timing pull at higher RPMs and how knock sensors may be holding the HEMI back.
✅ The importance of a wideband O2 sensor for accurate air-fuel ratio data.
Despite some tuning challenges, Old Red is running stronger than ever and proving that the 6.4 HEMI has a lot more potential than the factory setup allows.
If you’re into HEMI trucks, towing performance, and real-world tuning, this is a must-watch!
#HEMI #knocksensors #HPtuning #timingadvanceHEMI
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