Bonneville Speed Week And Chevy Engines - Performance Q&A

Kevin McClelland Mar 1, 2009 0 Comment(s)

The LS2 6.0L engine you have purchased from GM is the same engine that was released in the C-6 Corvette back in 2005. This 400hp beauty is a great street rod engine. Since you purchased the crate engine from GM, I must assume that you're going with GM's harness and controller for street rod/performance applications. This complete system sold under PN 19166568 and came complete with a harness, a controller, a mass airflow meter, a mass airflow meter mounting boss, a fly-by-wire accelerator pedal assembly, a pair of oxygen sensors and bosses, and complete instructions. This is a programmed ECM that supports the 58x reluctor wheel crank in the LS2 engine. However, this system does not have any transmission support, neither manual nor automatic.

To get to the bottom of the transmission control issue, we got some help from Marty Morris at Scoggin Dickey Performance Center. Morris told me of a standalone transmission controller kit (PN 12497316) that GM Performance Parts sells. This will control 4L60E, 4L65E, 4L80E, and 4L85E transmissions. The kit contains a wiring harness, software, and a connector for your computer. With this kit you can program shifting, part and wide-open throttle shifts, and shift firmness. With this GMPP trans control kit you can use your '98 Corvette transaxle assembly with no problems. The transmission controller will get its rpm speed, throttle position, and load reference from the engine management controller.

Good luck with your killer '57 project. Send us some pictures and an update when you get it running.


Budget EFI
QI have a new project, a '69 Chevy Blazer. I would like to put TBI injection on the 350 in the Blazer, but I need some guidance. I know that vendors would love to sell me all kinds of stuff, but I got a complete TBI setup with a harness (GM) off of an '89 pickup. How do I make it work? Thanks.
Jerry Zimmerman
Via email

AWouldn't it be nice if I could tell everyone how to make it work! Since you have a complete system from the '89 truck, you've won half the battle. However, you will need some support in the way of wiring and calibration to make the factory system work on a '69 engine. I recommend that you contact Howell Engine Development. Howell builds standalone TBI systems to retrofit systems using all GM throttle bodies, sensors, and ECMs. It has the ability to calibrate to specific engine combinations and to "calibrate out" functions not needed in your early truck. Howell can help with the "rewiring" of your factory harness. Over 50 percent of the wires in the factory harness can be removed because of emissions devices not on your early truck. Or you can purchase Howell's very popular TBI retrofit wiring harness. This harness is ready to plug and play with all the components you have from the '89 truck. This alone will save you so much time and headaches it's worth every penny.


Technical questions for Kevin McClelland can be sent to him at


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