Important fact about gasoline and power production

[Saaber]

ok..

[Lordalfa]

I dunno the mix ratio leh...... its supposed to be a racing additive to be mixed to petrol at a ratio of 25%.

 

Some guy selling it at Honda & scooby site. $35 for a 4 ltr bottle.

 

Also, methanol at $25 for a 5 ltr bottle.

 

Adding these "true" Octane boosters will not add more power unless you tune it up. You can run extreme ignition advance using these stuff.

[Sotong_kia]

Genie, I do feel the difference in pick up between Ron92 and Ron95.

Yes, it is all based on feeling, but I can feel the difference in response to similar accelerator input.. SPC 92 and SPC 95.

 

It is very obvious moving off from stops, when I make a turn cos I have to wait for pedestrians. Thus I

gently touch the accelerator to nudge it forward. Can feel the diff in 92 and 95. Not sure if the petrol additives makes them burn at diff temperature ?

[Dwoon]

Yes, Thanks for the feedback and advise. I reaalise this too. That is why I might not mix the recommended dosage as it might not be useful after attaining a certain level of RON/MON. I'll have to test it out in incremental steps of concentration of the mix.

 

Basically, I want to fully utilise the ECU's ability to adjust its advance timing for that little bit extra.

 

Also, I heard that using a higher octane fuel allows the boost to build much quicker (sometimes overshooting its boost setting) and be able to hold better.

 

Cheers!

[Lordalfa]

What is your engine? If JDM, comfirm can push to 103 RON.

[Kax2]

Maybe Your car has high compression ratio ?

Higher compression ratios produce more power, up to a point. The more you compress the air/fuel mixture, however, the more likely it is to spontaneously burst into flame (prior to the spark plug igniting it). Higher octane gasolines prevent this sort of early combustion. That is why high-performance cars generally need high octane gasoline - their engines are using higher compression ratios to get more power.

[Dwoon]

Not JDM lah....... just a normal EJ20 pushing 1.1 bar

[Lordalfa]

Then you need ignition advance and colder plugs and CDI.

 

Have been tried. Somebody had access to remainder F1 fuel in Sepang a few years back. Poured into his WRX tank and the car did not behave well.

 

The plugs fouled as well. The fuel air charge needed a much hotter plug.

[Dwoon]

I'm already on 1 grade colder plugs from stock.

 

But didn't know higher octane would foul plugs leh....... thought that at most, the full potential of the fuel is not realised.

[Lordalfa]

The higher up the octane you need more energy to ignite the fuel. That is why higher octane fuel will not detonate that easily.

[Dwoon]

like what you say, will stock some for use on special occasion.

 

 

I don't think he need lah as his ride is quite a monster now...

 

Just tried it out on half tank of fuel over the weekend........... its good stuff

 

I was afraid of detrimental effects or performance so I just mixed 1/3 the recommended dosage. That already makes a difference.

 

Engine runs smoother, idling is better and boost builds up a tad faster & overshoots (spikes). Petrol consumption does not seem to be adversely affected over the 1/4 tank that I wacked the car to test.