Once again, there are none except maybe a cam. If you want to be fast there are other ways. You are not going to make big power from this motor.Again, talking Motor - not sure why people cant grasp that concept. Yes the MX5 is quicker - but the motor in the MS3 is better than the MX5. I even said the car itself was heaver, which would lead to likely a slower car. OP was about motor internals - lets talk about that.
Thats not how it works. You are still chasing numbers. That does not mean its better in any way, it just means it makes more power. It does not mean in any way that the car will be faster. :bash::bash:Hypothetically if took a MX-5 motor in dropped it in a 3 I would get no real gain, if I took a MS3 motor and dropped it in my M3 - clearly I would being that it is 100+ HP over my current motor. Proving that in fact the motor is better.
Once again, you need to do more research on the SkyActiv engine. The 13:1 compression ratio is the theoretical maximum based on bore and stroke. The way the motor works varies the compression according to the engine load.While yes I agree with your racing comment, the one thing that is nice is the high compression which I am trying to hang onto. If (like in my OP) could get stronger internals I would take a stab at turbo. Anything right now over 5+ PSI would like result in catastrophic failure, but if the motor itself could take it - a small introduction of boost will yield high numbers based on the compression. I would likely need E85 to avoid other issues but that's fine - this isn't my daily driver.
You don't need stronger internals for the FI setup. Current FI units get about 250 hp from the 2.0. Thats more than enough for this car. You don't want to go much more than that or you risk blowing up the rest of the driveline. The transmission, clutch, halfshafts all would need to be upgraded. There is no way to be fast on a road course in a high power FWD car without a limited slip front differential.
Again, this chasing numbers is foolish. The car will never be a race car no matter how much wish it to be. If you are going to throw a lot of money at your car, get the important stuff and do it right. There is more to making a car go fast than power. Better tires- the OEM rubber sucks. Better brakes - if you are going to go fast you better be able to stop just as fast. Better suspension - if you are going to do some canyon driving or some such hooliganism you need to do more than go in a straight line. Same things apply if you intend to do track days. Why do you think that the MX5 was 10 seconds faster around Willow Springs? It wasn't because it had more power. It was because it is a faster car. There is a big difference.
If you want inexpensive useable power, get a tune. There are a couple good sources. That will get you to almost 200hp if done right.