Ok, every once and awhile I'll have a little fun and try and get to redline, but my revs don't go past about 7k under load, but will when in neutral. I haven't checked the timing but I put in new plugs and wires. Is that rev limit there for a reason or could something be off? It's a 90 vert btw.

 

An S5 NA shouldn't hit the rev limiter until something like 9k RPM. Redline is 8k RPM, and you should have no trouble reaching it.

A potential issue that could cause it to lose power up top is reduced flow from an injector or two, which would cause a lean hesitation. Or someone could have an aftermarket coil setup with a rev limiter.

 

Well, it's not an aftermarket coil setup, I know that for sure. It's fine putting some injector cleaner fluids in a rotory, right? I'll try doing that and see if it makes a difference. If that doesn't help, I'll make sure the timing is fine just to be sure.

 

Now it's only going to about 6250 rpm. WTF?

 

Have you checked you ignition system, plugs,wires and coils?