Grand National Chip Turbo Tweak 5.6 50 lb injector with ALKY. 100 octane (Aftermarket)

This ECU chip appears to be an aftermarket performance PROM labeled “TT5.6 2312 / 50# ALKY 100”, suggesting it was burned for 50 lb/hr injectors with alky and likely 100 octane or alcohol mix for the 1986–1987 Turbo Buick platform. Handwritten labeling indicates a custom or private-tuner calibration.

🟡 Yellow Dot – Aftermarket Tune Performance Unknown 

🔧 Compatibility:
• 1986–1987 Buick Grand National / Turbo T / T-Type / GNX
• Fits OEM 1227148 ECU (factory Turbo Buick computer)

📦 Includes: Chip only (as pictured)

Condition Notes:
• Hand-labeled aftermarket chip with injector and fuel type notes
• Pins intact, no corrosion observed
• Intended for modified setups — not a stock calibration

Why You Want It:
Great option for enthusiasts running 50# injectors who want to experiment with old-school alky-based tunes. Also an interesting piece for Turbo Buick chip collectors or for bench testing aftermarket calibrations.

⚠️ Disclaimer:
Tune parameters are unknown. T6P has not tested this chip for drivability, timing, fueling, or boost control. All items are sold as-is, with no returns or exchanges. Buyer is responsible for confirming injector and combo compatibility.