300 hp ka

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07-28-2009, 02:23 PM

#31

jramosthe1st!

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even a beefy v8 will not last long when pushed to it's limits, sure it will last longer, but no engine will last very long when your going to maximum output. the thing to keep in mind is that there's a trade off when hp is your goal. race car engines are the perfect example, all they need to do is finish the race, how ever long that may be.

there is also much truth to the old saying about no replacement for displacement, that's why i prefer nissan engines. nissans tend to have more cc's than the competitors. some may say that a 1.3-2.2l 4cl engine is proof of superior engineering, but i say it's a sign of a shorter lifespan. And that's just fort the 4cl engines, nissan follows this trend with most of their engines. but that's just my opinion so i could be wrong.

07-28-2009, 02:55 PM

#32

Biggamehit

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opinions are like penises...everyone has one.

07-28-2009, 04:15 PM

#33

BigVinnie

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Quote:

Originally Posted by jramosthe1st!

some may say that a 1.3-2.2l 4cl engine is proof of superior engineering, but i say it's a sign of a shorter lifespan. And that's just fort the 4cl engines, nissan follows this trend with most of their engines. but that's just my opinion so i could be wrong.

Nissan gets bigger and bigger on displacement every other year.
The reasons why are simple.
-Keep up on smog emissions
-increased HP and torque
-less wear and tear on internals
-it takes less energy to make more power

The last one I mentioned that it takes less energy to make more power is a very simple concept. Imagine that an engine is a vacuum. A vacuum with a larger displacement or liter size does not have to work as hard at any given rpm to suck air in. Larger piston/cylinder area's allow for larger valves within that surface area (for example a DOHC valve train), this improves the engines ability to induct air at a much easier rate since restrictions are reduced. Smaller pistons have to work harder at achieving induction since valve size is limited to piston/cylinder area. A term well mentioned would be valve shrouding.
Larger displacement also reduces load which has alot to do with how the engine inducts air at any given RPM.
That is why there is no replacement for displacement.