Twin Turbo Kit � Suggested Engine Parameters

Displacement�������������. 305 to 410 ci. SB Chevy
Compression Ratio����������.. 7.5 to 8.5-1
Cylinder Head������������� Stock or Raised Port 23 Degree
Valve Material������������� Stainless Steel Valves
Crankshaft��������������. Forged Steel Crankshaft
Connecting Rods�����������. Forged Steel Connecting Rods
Pistons���������������� Forged Pistons
Camshaft��������������� Any type / low overlap
Engine Management���������� Aftermarket Fuel and Spark
Maximum RPM������������.. 6500 RPM
Suggested Gauges����������.. Pyrometer, Boost, Air/Fuel

Boost Levels

There are two boost levels available.
6lbs � This would work well with a stock engine or a crate engine like a ZZ4.
12lbs � This should only be used with modified engines with the modifications listed above.

Power Levels

With a properly modified engine, the kit should support up to 1100HP.

Recommended Engine Management

Throughout our development of the kit, we have used an Accel DFI as the engine management system. If you choose this system, we would be able to provide a baseline calibration to assist you in your project.

There are many other choices for engine management:
Holley Commander 950
Electromotive TEC 3
Edelbrock Pro-Flo EFI
Simple Digital Systems
Haltech
FAST
Microtech
Perfect Power

Do your research before you purchase an engine management system. Any system should have the calibration work done by a qualified professional.

Gale Banks Engineering strongly recommends the use of Electronic Fuel Injection when installing our kit. Our research shows that the tune ability, safety and dependability of EFI is vastly superior to the carbureted systems of the past. If you choose to use carburetion, Gale Banks Engineering technical staff is not in a position to provide technical assistance.

Wastegate and Exhaust Plumbing

The wastegate and exhaust plumbing will be up to the installer. We provide flanges for both the wastegates and the turbine housing outlets for the installer to weld to.