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Originally Posted by harsh tymes s13
well that shit worked and now im ready for tune. waiting on the rest of the stuff to come in. how is the split fire system. was it really worth it?
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Well your setup and needs will decide weather its worth it for you or not. Supposedly there is an increase in power even on a stock motor, I dunno though. It was part of a new setup so I dont have before and after results to show power wise.
However with my setup I think it did help me. I run e-85 and they do seem to help with that fuel. For starters cold starts can be a little harder on an e-85 engine and they helped with that. Another thing is my car does tend to sit for a few weeks sometimes with out being started and I run a small battery, with that said stock coil packs dont like to ignite with low voltage, even if the motor cranks. Anyways I have had really cold temps, my car has sat for a couple weeks and the battery had lost some voltage. The motor barely cranked but after a revolution or 2 it fired up and spuddered for about 15 seconds and picked up a smooth idle where as when in the past running e-85 with stock coils in the same situation I would have had to have the battery on a jumper box or cables and crank the crap out of it and have to deal with it dieing all the time.
Now anyways I know I didnt have a whole lot to say about the performance increases there, but that should be enough to tell you that they are a stronger more powerfull set of coils right?
Another thing that I have heard and makes sence is you can run some more dwell on the ignition with these coils without them overheating like the stockers. Im not positive how much but Im going to look into this and this next go around when I tune Im going to try this. I have toyed with it but set the dwell back to stock because without a dyno or without someone doing the math (which im not the best at) I had no idea how much more dwell to run. What I do know is the amout I was running was enough to pop the ignitor chip if I were to have been using stock coils but it didnt get much hotter than normal. We will see the next time after some math is done and when I get the car on the dyno. Im waiting on some parts and some custom stuff before I hit the dyno again with my dual pumps and 4.0 bar setup.
One reason I got the kit was because since Im running e-85 and it is known to be harder to light (one of the perks of it actually) I knew I wanted a stronger spark in order to be able to light it when I wanted it to light. Aside from it being harder to light there is a much higher fuel to air ratio in the chamber which makes it harder to light too as well as 30-40% more fuel being in the combustion chamber raises the overall compression as well (once again a perk of the fuel, however increases the need for a stronger spark) and another thing that makes the compression higher is that the heat from the engine once warm makes the fuel turn into a steam like vapor. The vapor builds more pressure and energy. So several things factor in and I didnt think a stronger spark sounded like a bad idea.
Now with that said, I have a completly reasonable explation for my need for the kit, however my short answer of "yes its worth it" might have been a lie in your case.
Something that I felt was wierd was I was actually unable to Increase the gap on the plugs over what I was running on the stock plugs. Blow out seemed to happen the same with both sets of coils. Im thinking Im going to add extra engine grounds this time too and see how large of a gap I can get away with (on a street tune) before hitting the dyno.
Hope I could help, and sorry for being winded. I tend to want to over explain things in order to help as much as I can instead of providing worthless short answers.