Originally Posted by
satoch
I run them in my GO 3 and 5 port engines and I'm very happy. Keep in mind since a turbo button has a tapered seat the length of the plug doesn't really matter.
I could get in to some serious scientific theory about wire core thickness, wire core diameter, plug bore diameter, coil turns, coil length, etc. but that would just take up way too much time.
Bottom line, the Merlin Plugs work great, are very cost competitive and Aldon has 50 years in the RC industry. He's been making plugs for many OEMs for many years.
I've been using the non turbo Merlins and they work fine. I just was comparing their turbo plug to the OS tonight and the distance between where the threads end and the taper starts is about double on the Merlin, that's all. If they work that's all that matters to me. For the cost difference there's no reason to go with any other plug. It's ridiculous how much the price of plugs has gone up over the past few years.