Because factory rev limits are not meant to be hit often, if at all. If we all daily drove our Evos past 7K every shift, we'd be done after 10K mi

The tune is coming as soon as my fuel pump arrives. Read my above comment regarding factory rev limit. And I'm not dumb enough to stroll into Mitsu with all my mods installed and demand warranty work.

People seem to think that install mod = warranty void... sorry, but mod failure = warranty void. If the mod is installed, it can be uninstalled and the car is still in warranty (unless the mod causes the failure) So I see absolutely no shame in installing mods, then uninstalling if engine failure not related to the mods occurs.

Basically, that's true for my setup.

 

My original question still stands...

Can there possibly be any downside to lowering rev limit to 7300 (presuming I don't plan on revving that high, and to rev that high would be a mistake or oversight on my part).

Thanks again for the feedback

 

NO

 

I never dyno'd my car with stock cams, so I can't agree/disagree on that basis. But all the dyno sheets I have (with cams, some with a TME turbo, and others with a 50 trim) tell me to shift above stock redline for maximum acceleration through the gears.

 

It can be dangerous to spread inaccurate information such as this. Someone that does not know any better may read this and think that their car is protected from mechanical over-rev by the factory rev limiter.

To the OP, the upside of lowering your rev limiter is that you will be reducing stresses due to high RPM on your motor. The downside is that it is more likely that you may hit the rev limiter which can be hard on the motor. Ultimately, you control when you shift, so you could shift at 6000 RPM all the time and raise your rev limit to 9000 RPM without any problem. I would leave it at 7600 RPM if I were you, as I'd rather accidentally run up to 7400 RPM than run into the rev limiter at 7200.

-Paul

 

I guess I really just don't understand this question. If you don't want to rev it past 7300 rpm just shift before that. There is no reason to lower the rev limiter from stock unless, you are one of those people that has to bounce it off the chip to know when to shift. If that's the case get a shift light.

Besides if your worried about your engine longevity or your warranty just don't mod the car or abuse it.

 

edit

 

I find that interesting... that is exactly the type of response I'm looking for...

I realize that if I'm concerned about engine health & warranty that I could just NOT rev it that high... but we all own Evo's here... you didn't buy it to shift at 5K RPM every time... there will be times I want to rev to redline, and those times, I just want to limit the possibility of overrevving the engine. That's all!

 

In a fundamental way, yes, but this statement is potentially confusing in itself. If we configured shift points around the torque peak, we'd be going slower. The optimum shift points for any gear change is that which allows best average hp (not torque) for the duration of the preceding gear.