Originally Posted by
franklucas
i got a race prep .24 eb mod and it had no shims. I had good bottom and no top, like i was missing the upper 20% of the rpm range. after i blew my third or forth plug i disassembled it and found no shims. So for those of you having some problems I would check the shimming. I already had some slop in my rod after only eds break in and four tanks by me. I sent it in to chad to take a look at it and he said i would have a new engine by the end of the last week. still waiting but i am sure he is a busy man.
Frank, if it was an EBMods engine you should have sent it to ME! No one else is authorized to work on any of my engines...... This goes for anyone that has an EBMods ExTech engine.
The .24 engine only has one shim installed and it's aluminum and can be easily mistaken for not having shims. This happens all the time to people that pull the head off, and the shim gets stuck to the head button and blends in, which is exactly what happen to you this time.. But I know you'll say it wasn't.... The .24 shims fit tight on the head button and require a razor to lift from button.
Also unlike your .21 please don't reinstall your heatsink wrong after removing it. Just like you had your stock extech 21 head on sideways during the Hobby Hut race..And when I asked you about it, but you denied removing it? So just please pay closer attention when working on your engines.
FYI, if the engine was under shimed it would scream on the topend.... not fall flat,,, falling flat on top is a sign of low compression, wrong pipe, or too hot of a glow plug.