GroupBquattro

Now that the timing belt is behind, it's time for the next step. I did some research and the copper NGK BKR7E seem to be best for a tuned car running high octane fuel. But how about the coils ? Are some better than others? My research didn't lead to any conclusions.

Thank you all

the_duke

Coils either work or they don't. Also as you haven't posted the year and motor your car has it's difficult to provide good information. Earlier years still use ICM's and 3 wire coils. Later years (BEL motor) don't have ICM's and use 4 wire coils.

GroupBquattro

yeah, I think the year and model would be needed. 2000 A6 2.7

georgeb944

The original equipment ones seems pretty good. I have had new (chinese) ones fail after a month... I carry around a couple in case one fails on a trip, and the cost of a used one is quite a bit less than a new from from an autoparts dealer.

GroupBquattro

So those fancy ones sold by ECS or other tuners aren't really bringing anything new to the game, correct ?

Prospeeder

Cheap ones suck. I have good luck with Denso, Beru, and Bosch. The karolyn/STI coils are just garbage, Meyle Suck. Any coil from a random parts store is junk.

the_duke

If you want to spend some money then this:

https://www.ecstuning.com/b-ecs-part...n1saAnR98P8HAQ

SloopJohnB@mac.com

On two V8s. Easy to find/check/replace with VCDS. Usually I don't even try to swap coils to a non-error hole. I just slap in my spare and when it fixes the problem I order a new coil for my spare.

PS: Be very careful with removing and replacing a crush gasket (rather than a cone-no-gasket) spark plug. I will never do that again. Those gaskets are good really for only one time install. Reinstalling them attempts to crush the gasket further and often it won't and then the plug leaks (high compression v8, 11:1 or more) and combustion gases eat out the aluminum threads and pop the plug (ask me how I know this!). Repairing a blown spark plug hole is a 45-90 minute job the first time you do it carefully and about $200 in tooling. No dealer will touch it (they don't have the tools, an independent might, dunno what the cost is) other than to replace the entire head. $$$$ to replace the head. A new plug is a lot less expensive.

GroupBquattro

Actually this is exactly what I was considering, think I'm going for it.

the_duke

Not necessarily better performance but it eliminates the ICM's. I've never owned a car with ICM's but I read about people having issues with them all the time. My two cars without ICM's have never had a coil issue.