Winter Project LS-2 Coils - ZR-1 Net Registry Forums

XfireZ51 · 03-08-2009

=Jeff= and myself have been working on a prototype conversion for LS-2 coils on an LT-5. LS coils is a popular upgrade for ignition systems being used by other enthusiasts. And Pete kept complaining about the cost of an LT-5 ignition module. So I decided to look into it. This conversion won't
eliminate the IM, but it will significantly reduce the heat transferred through it. Moving the coils out from under the plenum also opens up quite a bit of real estate and reduces heat under plenum due to coils.
The LS2s fire in "waste spark" mode for our application. Those who are using or contemplating forced induction and higher compressin ratios, the LS2 coil packs a punch. Top end spark should be more stable also. I was able to start the motor this morning. We need to change the way we supply power to the coils, but we know what to do there. I can tell you the motor had a "basso profundo" note to it. Lower than previous.
LS coils will allow wider plug gaps without taxing the ignition module.
We'll add a video of the motor running later. For now, here's some pics.
We're talking "proof of concept" so the install looks a bit "rough".

03-08-2009	#1
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,708	Winter Project LS-2 Coils =Jeff= and myself have been working on a prototype conversion for LS-2 coils on an LT-5. LS coils is a popular upgrade for ignition systems being used by other enthusiasts. And Pete kept complaining about the cost of an LT-5 ignition module. So I decided to look into it. This conversion won't eliminate the IM, but it will significantly reduce the heat transferred through it. Moving the coils out from under the plenum also opens up quite a bit of real estate and reduces heat under plenum due to coils. The LS2s fire in "waste spark" mode for our application. Those who are using or contemplating forced induction and higher compressin ratios, the LS2 coil packs a punch. Top end spark should be more stable also. I was able to start the motor this morning. We need to change the way we supply power to the coils, but we know what to do there. I can tell you the motor had a "basso profundo" note to it. Lower than previous. LS coils will allow wider plug gaps without taxing the ignition module. We'll add a video of the motor running later. For now, here's some pics. We're talking "proof of concept" so the install looks a bit "rough".