Quote:
Originally Posted by gmorris
I'm going to convert my carbed 540 over to EFI this winter and am taking a serious look at the new Holley HP EFI setup. One nice feature of the system is it's ability to drive multiple coils and use a crank trigger to eliminate my MSD box and distributor. I would also likely use a cam plug with sync so I can go with sequential fueling and timing rather than waste spark.
Has anyone here converted a non-LS to multiple coil system? What coils did you use? Would standard factory or MSD LS style coils work fine? I would have to come up with a decent way to mount them near the head which will be a pain. Is there really much advantage over the twin tower coil waste fire setup that Holley uses as a default?
The other option is to use a dual sync distributor to do sequential fueling and just stick with the 6AL2 box I already have to simplify and save some cost. Is the stability of the crank trigger worth it? I still get timing control with the ECU that way.
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I'm using the new Accel ICM to drive coil per plug ignition on my 540. The ICM takes over the timing functions and leaves the old ECM as fuel only.
Mounting the coils is indeed a pain, I have not come up yet with an acceptable solution. If you are building a first gen camaro and you have a power brake booster the usual mount on the valve cover is not an option. I've been considering building mounts to stash them under the headers, down by the oil pan. There is no room behind the engine either.