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Quick explanation
Posted by 'itpro' on 22 Mar 2011 @ 00:41

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itproJoined: August 2001
Total Posts: 6
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We have discussed the concept behind high RON/Octane number fuels many times, here. Obviously, there are other benefits to fuels like BP Ultimate but a high RON/octane rating in the GX160 is NOT one of them.

The logic goes as follows.:-

Diesel engined cars use the high compression in the cylinder to ignite the fuel (highly compressed fuel/air gets hot enough to ignite).

Petrol. driven cars use a spark plug to igtnite the fuel..... however, high enough compression WILL ignite equired in a diesel).

However, compression-ignition in a petrol engine is a BAD thing (less power and more damage done to the engine) so we try to avoid it.

But.... if you raise the compression in a petrol engine and can STILL avoid compression-ignition, you CAN get more power from the fuel.

So... how do we raise the compression WITHOUT getting compression-ignition? That's simple..... put something INTO the fuel which makes fuel compression-ignite at a HIGHER compression. What that means is that such fuel is LESS likely to ignite at high-compression.

Having such a substance which makes it harder for compression-ignition to occur means that we can run high-performance engines at a HIGHER compression without them compression-igniting.... so long as they run more expensive fuel with special additives.

So..... how do we know which fuels can be run in such high compression cars? We mark that fuel with a higher Octane number or 'RON' (Standing for Research Octane Number). High octane/RON fuels can be used in high compression pterol engines. It's NOT the High-RON fuel that gives more power, it's just that we can run it in high-compression engines.

Using high RON fuels in a low compression engine does NOTHING to improve the power AT ALL.

The GX160 engine is a LOW compression engine, thus, High RON fuels are an expensive waste of time for the GX160.

Ian

Message Thread:

Super or Standard? by 'mattman' (21 Mar 2011 @ 18:43)

Re: Super or Standard? by 'Thehairbears' (21 Mar 2011 @ 19:19)

Re: Super or Standard? by 'lubo78' (21 Mar 2011 @ 19:42)

Re: Super or Standard? by 'Trev' (21 Mar 2011 @ 19:59)

Re: Super or Standard? by 'JCC' (21 Mar 2011 @ 21:02)

Re: Super or Standard? by 'lard ass bob' (21 Mar 2011 @ 22:36)

Re: Super or Standard? by 'Trev' (21 Mar 2011 @ 23:24)

Quick explanation by 'itpro' << You are here!

Re: Quick explanation by 'Thehairbears' (22 Mar 2011 @ 8:24)

Re: Super or Standard? by 'SteveGraves' (22 Mar 2011 @ 12:55)

Re: Super or Standard? by 'Trev' (22 Mar 2011 @ 14:18)

Re: Super or Standard? by 'lard ass bob' (23 Mar 2011 @ 17:12)

Re: Super or Standard? by 'Trev' (23 Mar 2011 @ 17:57)

Re: Super or Standard? by 'lard ass bob' (24 Mar 2011 @ 17:47)

Re: Super or Standard? by 'Trev' (24 Mar 2011 @ 20:26)

Re: Super or Standard? by 'lard ass bob' (24 Mar 2011 @ 21:18)

Re: Super or Standard? by 'Trev' (24 Mar 2011 @ 21:23)

Ron and Mon by 'Trev' (24 Mar 2011 @ 21:31)

Re: Ron and Mon by 'lard ass bob' (24 Mar 2011 @ 22:26)

Re: Ron and Mon by 'Trev' (24 Mar 2011 @ 23:04)

Re: Ron and Mon by 'Trev' (24 Mar 2011 @ 23:12)

Re: Ron and Mon by 'lard ass bob' (25 Mar 2011 @ 9:16)

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