eficonnection
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Hi Guys,
I've posted previously about our intentions for a GM fuel management system upgrade for these engines, but this new thread is going to be specific to the 2007-up E37 ECM.
About the E37 ECM
Introduced with the 4.3L engine in the 2007 Silverado. This engine uses wasted spark and electronic throttle. The crankshaft signal requirement is 58x and the camshaft requirement is 4x. This controller is supported by EFILive and will handle 3 BAR.
58x Crankshaft Signal Requirement
We were able to pull from the shelf our 58x SBC crankshaft reluctor and TPIS billet aluminum SBC timing cover. We used a production GM 1996-up Vortec crankshaft position sensor. Being that the 4.3L has so much in common with the SBC engine, there was no need for a reluctor specific to the 4.3L engine. The crankshaft reluctor installs behind the timing cover. No goofy bracketry to install to hold and align a crankshaft position sensor.
4x Camshaft Signal Requirement
We pulled from the shelf again our 4x SBC camshaft reluctor for 1996-up Vortec distributors. We've been using these reluctors for Gen IV 58x conversions for SBC and BBC engines. Since the 4.3L shares the same Vortec distributor (less 6 cyl cap), there was no new work to do here.
Electronic Throttle Requirement
All GM Gen IV ECMs require electronic throttle. More specifically, the GM Gen IV ECMs have no provision for an idle air motor and require two throttle position signals and an electronic pedal. Again, we were able to pull from the shelf our TPI/LT1 electronic throttle body as it is the same bolt and bore pattern as the Sy/Ty plenum.
Wasted Spark Coil Module
We designed a bracket that locates the ignition coil module just below and behind the stock intercooler. Th CNC milled bracket attaches to the valve cover with two longer valve cover to cylinder head bolts.
EFILive Tuning Support
The biggie here is that this engine can now be tuned with popular tuning software. EFILive has fantastic support for the E37 ECM.
Future Development
We are working toward a 4x camshaft timing sprocket and timing cover solution. This is how GM did it with the Gen IV LS engines to avoid the installation/alignment issues of the camshaft signal. We hope to have this in production by the end of 2013.
That's as far as we've gotten with this project. Plans are to run the engine on the test stand in the upcoming months and then send it out for some dyno time.
This is expensive. There is no way to sugar coat it. Crank/cam signal solution, billet timing cover, throttle body, coil module with bracket, ECM, and wire harness will exceed $2,000. We're not taking orders or looking for people who want to try this out. This is just a heads up to let you know what we are doing with the Syclone/Typhoon engines. If we decide to offer a conversion kit for sale, details will be available at that time.
I've posted previously about our intentions for a GM fuel management system upgrade for these engines, but this new thread is going to be specific to the 2007-up E37 ECM.
About the E37 ECM
Introduced with the 4.3L engine in the 2007 Silverado. This engine uses wasted spark and electronic throttle. The crankshaft signal requirement is 58x and the camshaft requirement is 4x. This controller is supported by EFILive and will handle 3 BAR.
58x Crankshaft Signal Requirement
We were able to pull from the shelf our 58x SBC crankshaft reluctor and TPIS billet aluminum SBC timing cover. We used a production GM 1996-up Vortec crankshaft position sensor. Being that the 4.3L has so much in common with the SBC engine, there was no need for a reluctor specific to the 4.3L engine. The crankshaft reluctor installs behind the timing cover. No goofy bracketry to install to hold and align a crankshaft position sensor.
4x Camshaft Signal Requirement
We pulled from the shelf again our 4x SBC camshaft reluctor for 1996-up Vortec distributors. We've been using these reluctors for Gen IV 58x conversions for SBC and BBC engines. Since the 4.3L shares the same Vortec distributor (less 6 cyl cap), there was no new work to do here.
Electronic Throttle Requirement
All GM Gen IV ECMs require electronic throttle. More specifically, the GM Gen IV ECMs have no provision for an idle air motor and require two throttle position signals and an electronic pedal. Again, we were able to pull from the shelf our TPI/LT1 electronic throttle body as it is the same bolt and bore pattern as the Sy/Ty plenum.
Wasted Spark Coil Module
We designed a bracket that locates the ignition coil module just below and behind the stock intercooler. Th CNC milled bracket attaches to the valve cover with two longer valve cover to cylinder head bolts.
EFILive Tuning Support
The biggie here is that this engine can now be tuned with popular tuning software. EFILive has fantastic support for the E37 ECM.
Future Development
We are working toward a 4x camshaft timing sprocket and timing cover solution. This is how GM did it with the Gen IV LS engines to avoid the installation/alignment issues of the camshaft signal. We hope to have this in production by the end of 2013.
That's as far as we've gotten with this project. Plans are to run the engine on the test stand in the upcoming months and then send it out for some dyno time.
This is expensive. There is no way to sugar coat it. Crank/cam signal solution, billet timing cover, throttle body, coil module with bracket, ECM, and wire harness will exceed $2,000. We're not taking orders or looking for people who want to try this out. This is just a heads up to let you know what we are doing with the Syclone/Typhoon engines. If we decide to offer a conversion kit for sale, details will be available at that time.
