Hondas NA engines

[pornstar]

Why is it that Hondas engines are talked about much more than other high powered high revving Naturally Aspirated makes?

I was talking to an engineeer about this the other day, and he was shocked to say the least when he found out that the b18c runs an 89mm stroke that can rev to 8,200.

The general Consensus is that Hondas engines are unbelieveably smooth and well balanced. Thats how they are able to rev so high with such a long stroke. We got talking some more and got into some theories why Honda traditionally use small bore and long stroke engines when they are required to rev high, which can be done much easier with a short stroke crank.

Anyone wanna offer ideas or suggestions?

[h22a accord]

well, i guess that the longer the stroke, the more power you can make per litre. to do this you have to to make a well balanced, strong and well assembled engine of good design which honda are renowned for doing. simple really.

[SPEEDCORE]

I'm not all that cluey with such issues but would it have something to do with the ability to produce torque?

Ie. they insist on using a longer throw of the piston in an attempt to regain as much torque as possible and increase the ability to rev by pure attention to detail in the balancing of the engine internals....

[pornstar]

yes ur both right, the stroke of a crank determines the swept area of the pistons travel, and hence therefore determines ultimately the capacity of the motor.

ie bore x stroke x no of cylinders

In that regard yes longer stroke means more capacity, more capacity means more torque so ur both right. But what im saying is, the traditional thinking is that a short stroke allows an engine to rev much easier than a long stroke. The question then is, why does honda choose the longer stroke?

[pornstar]

oh btw, H22a Accord, technically speaking what u said about the power per litre isnt right... the stroke determines how many litres the engine is in combination with the bore

[SPEEDCORE]

Purely for torque I guess man..... its not like a motorbike at 200kg mark, where extreamly short stroke providing pleanty of BHP but does not need torque..... Vs a car over the 1000kg mark.

That is the trade off.

[2ds]

pft b18cr is just a b16a with a stroker kit

-2ds

[Weq]

pft b18cr is just a b16a with a stroker kit

-2ds

in other words, it has torque and the b16 doesnt. Im guessing torque also, buts its very uneducated.

[SPEEDCORE]

pft b18cr is just a b16a with a stroker kit

-2ds

Beg to differ....... it has a different block height. However if you had said it was a B16B with a stroker kit than I would have said yes.

[carbine]

Honda doesn't make engines specifically to rev high. They make highly efficient engines that are built with quality materials and quality machinery to high tolerances, the fact that they rev high is a consequence of this.

[2ds]

Honda doesn't make engines specifically to rev high. They make highly efficient engines that are built with quality materials and quality machinery to high tolerances, the fact that they rev high is a consequence of this.

I dispute that. they could just have easily decided to make power by increasing the displacement instead of making the engine rev high.

-2ds

[SPEEDCORE]

I don't see where you are comming from so can't comment on its validity.

True they are effeicient, true they are built to strict tolerances but to say that they rev this high as a consequence (to me) does not seem right to me.

If they had not been designed to rev hard, then why would they in their right mind build an engine like that is not as smooth and quiet as lets say an engine in a Honda Legend is like.

To me... they HAVE been desined to rev high as due to the lack of capacity or F/I compared with other "performance" cars, as they need to rev that high to generate the power they put out.

I read someones sig once and I have taken this into account...

The only replacement for displacement is revolutions.