Looking for more coil input. I've narrowed it to two possible options, 034 VS EFI Express.
01-22-2009, 05:37 AM
#12
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They can't possibly be worse than 1.8 coils, they sucked on my A4 had have gotten worse....
in newer models. I'd never upgrade to something that's so prone to crapple out. I think the option that Marc makes is the way to go.
01-22-2009, 06:10 AM
#14
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so from what i've read, for a chipped DD that isn't pushed very hard a 1.8t kit will be ample?
but i really don't want to deal with coil packs crapping out.
Marc's kit is very very tempting. appealing to me b/c it would seem to be very robust for my application (or any perhaps).
Marc's kit is very very tempting. appealing to me b/c it would seem to be very robust for my application (or any perhaps).
01-22-2009, 06:40 AM
#15
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GM coils all the way
There is LS2 and LS1 and truck coils to choose from.
I wouldn't even consider putting 1.8, 2.7, etc under the valve cover as it is I think the heat is what kill the OEM coils, just happens to take 100K miles or more. I would guess a cooked 1.8 coil would have a really really short life span.
I know there is no way to do a trade study but I would be interested in the data of when coils failed vs power levels. My gut tells me more power, shorter life span due to heat and how much harder they work.
Only down side to the GM retrofit is there is no real DYI other than wiring diagrams. The rest is up to you (mounting and plug wires).
I wouldn't even consider putting 1.8, 2.7, etc under the valve cover as it is I think the heat is what kill the OEM coils, just happens to take 100K miles or more. I would guess a cooked 1.8 coil would have a really really short life span.
I know there is no way to do a trade study but I would be interested in the data of when coils failed vs power levels. My gut tells me more power, shorter life span due to heat and how much harder they work.
Only down side to the GM retrofit is there is no real DYI other than wiring diagrams. The rest is up to you (mounting and plug wires).
01-22-2009, 07:22 AM
#16
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Looking at both, I would go with Marks set up and the GM coils, looks to be more robust.
I myself would even consider doing Marks harness and LS2 coils if I start to have coil/ignition troubles and I have been a staunch advocate of the original set up.
01-22-2009, 08:07 AM
#18
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part of the question is COP vs. remote coil. main logic for COP is OEM cheapniz.
OEM's like COP because there's no expensive high-voltage wires to buy, and potentially simpler installation labor vs. installing coils someplace and then also wiring up separate HT wires.
Cost aside, you balance potential problems with HT wires (connections, heat degradation) vs. temperature degradation of the coil itself from being on top of the motor.
Even though I still have OEM, I would lean pretty firmly on the remote-coil solution. Some might claim there's some kind of better energy from the coil being extremely close to the plug but I think that's spurious as long as the plug wires are high quality and in good repair and well installed.
Cost aside, you balance potential problems with HT wires (connections, heat degradation) vs. temperature degradation of the coil itself from being on top of the motor.
Even though I still have OEM, I would lean pretty firmly on the remote-coil solution. Some might claim there's some kind of better energy from the coil being extremely close to the plug but I think that's spurious as long as the plug wires are high quality and in good repair and well installed.