Post by
Darius »
https://forums.nicoclub.com/darius-u5470.html
Mon Nov 16, 2009 10:23 am
...IF they are in perfect operating condition.
Most likely, they are tired 15 year old coils and need to be replaced when you start throwing some real fuel and boost at them.
Here's the summary:
Splitfires - Expensive for the performance level. They are a great drop-in product typically alleviating misfires caused by old coils. For an average 500hp setup, they will do.
GM coils - AKA Buick GN coils. These coils are wasted spark coils found in nearly every GM sedan from the 90's. Wasted spark is a waste of time, so skip to LS2 coils if you are even thinking about going this route.
LSx - LS1 coils work better than Splitfires and GM coils from a performance standpoint, but you have to rewire the ignition drivers from the ECU. Even better than the LS1 coils are the LS2 and the LS2 truck coils. The truck coils have been shown to put out more spark than the standard LS2 coils and have better cooling from the integrated heat sink on the housing. They have built in ignitors so all you RB25 S1 guys can ditch the ignitor on top of the coil cover. This setup should cost no more than $350 and you will never exceed its power limitations. If you do, you are god.
SS coils - Wha? I have no idea what those are, so I'll leave that part of the response up to Ricky. But I'm imagining them being competition for the Splitfires at a more reasonable price.