The GM LSA crate engine is one of the best performance bargains available today. Very refined driveability combined with high-horsepower output give this engine a Dr. Jekyll / Mr. Hyde personality.
The early fueling requirements stated in the GM installation instructions were incorrect. Unfortunately, the “correct” specifications are still difficult to obtain. GM specified 60psi at idle and ramping to 65psi at WOT. This specification is not possible with any aftermarket mechanical regulator. However, VaporWorx has developed an LSA-specific controller that meets this fuel demand. This system works with the LSA crate engine and the LSA Erod version.
For fuel modules, two excellent choices from GM are available. First is the Gen5 ZL1 module. Good for up to 650FWHP gasoline, this reasonably priced part will work well for engines with mild modifications such as headers, 2-3psi extra boost, a mild camshaft, and a good tune. This is a perfect, low-cost fuel module for the Erod version, especially when CARB compliance is needed.
If more power is expected (better to plan for the future as well) then the Cadillac CTS-V fuel module is the next step up. Good for approximately 800FWHP gasoline it is the highest output standard fuel module available from GM.
VaporWorx offers pulse width modulation kits for either fuel module, and often can make the wiring harness universal, meaning that it will work with both the ZL1 and CTS-V. In this arrangement if you decide to upgrade from the ZL1 to the CTS-V in the future, no new wiring harness will be needed.
To order this option, simply choose the PWM kit that you wish, then select the LSA Crate Engine option here https://www.vaporworx.com/product/mapmod/ This option may also be chosen during checkout.