its delicate. im not yet done coz all Proton SC near me dont wanna do it. they asked me to go to COSE SA.
if u r doing it outside, most probably its only drain, and topup.
make sure they topup the exact amount they drain out.

Ron Rating is how much compression to take before the fuel ignite itself ... if the timing is set to slower .. u pour in 95 / 97 will it make any difference ?

97 is not more powerful than 95 .. its the same sheet if your car can take 95. but u can tune more for 97 coz it can take more squeeze .. can tahan more heat before self ignite. the slight difference u guys feel in 97 and 95 is due to the different addictive the petrol company blend in, example V-power, the additive are meant to reduce friction, reduce friction means less power lost. So in general both 95 and 97 if the additive are the same it wont matters.. NO DIFFERENCES in performance.

Octane rating or octane number is a standard measure of the performance of a motor or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating. In broad terms, fuels with a higher octane rating are used in high-compression engines that generally have higher performance. In contrast, fuels with lower octane numbers (but higher cetane numbers) are ideal for diesel engines. Use of gasoline with lower octane numbers may lead to the problem of engine knocking.[1]

Curi from Wiki


Un mou ?
use higher RON to prevent knocking.. detune jo means prevent lo.

one of the best explanation i've heard

Meaning 97 with detune timing is a waste?
A engine tune for 97 not suitable for 92
But tuning that suit 92 if use 97 no problem?

Need to digest again

correct .. but u using a timing tat suits a 92 ... pour in 97 .. the engine will treat it as 92 only .. why waste money ?

"A fuel with a higher octane rating is less prone to auto-ignition and can withstand a greater rise in temperature during the compression stroke of an internal combustion engine without auto-igniting, thus allowing more power to be extracted from the Otto-Cycle.

If during the compression stroke the air / fuel mix reaches a temperature greater than the auto-ignition temperature of the fuel, the fuel self or auto-ignites. When auto-ignition occurs (before the piston reaches the top of its travel) the up-rising piston is then attempting to squeeze the rapidly heating fuel charge. This will usually destroy an engine quickly if allowed to continue"

Auto-ignition = Knocking

But sure people going to say my old Iswara knock like no tomorrow also going strong wor

This part from the same article ..

Many high-performance engines are designed to operate with a high maximum compression, and thus demand fuels of higher octane. A common misconception is that power output or fuel efficiency can be improved by burning fuel of higher octane than that specified by the engine manufacturer. The power output of an engine depends in part on the energy density of the fuel being burnt. Fuels of different octane ratings may have similar densities, but because switching to a higher octane fuel does not add more hydrocarbon content or oxygen, the engine cannot develop more power

slowly mai gasket crack .. valve kantoi .. need top overhaul lo

This statement made those that pump higher octane stupid

Another article for those interested ..

Article for Engine knocking

Taken from the article

For performance cars, 98 RON go-go juice is the norm. But does a car that is designed to run on 95 RON fuel run better on 98 RON fuel? Some swear by it, but from what I have seen, I have no evidence to sustain that theory. Sure, you may get better mileage, but I am skeptical that we would see measurably positive results on the dyno. However, there are certainly exceptions to any rule, and there are just so many variables to consider it’s not worth turning the discussion into argument.

Knocking ....

This is not a good start in the first place. When an engine ‘knocks’ the engine temperature soars, and with most modern engines using an all alloy block, heat is bad... very bad.


long run ..

now u know why i ask not to waste money on pumping 97 .. unless u wan me tune for it with proper dyno graph..
with 97 the timing can be push higher without knocking . because it can sustain self detonation better than 95. but if the tuning is for 95, u wont benefit

Those that said 97 clean engine plainly BS?

u wan talk about power or clean engine?

different company put diff addictive as detergent to clean the engine carbon deposit. Yes they does make a difference.. and again its not due to the 95 or 97 .. its the addictive ..

simple example, bhp or caltex alwasy promote their petrol detergent .. nothing to do with the 95 or 97
Caltex

Designed to Clean.

It's no secret that the wrong choice of fuel may damage your vehicle. A build up of carbon deposits adversely affects injector spray patterns. The result: the ability to deliver fuel during the combustion cycle is hampered - causing loss of power.

Vortex Premium FuelsDirty intake valves may further reduce the efficiency of the fuel-air flow and an engine's performance. Your car will feel sluggish and fuel efficiency will be reduced. That's why vehicle manufacturers often recommend premium fuels.

Caltex Vortex Premium Fuels have been specifically formulated with special detergents to clean your car's fuel system while you drive - breaking down and removing deposits that build up in critical areas of the fuel delivery system.

Used regularly, Vortex Premium Fuels will ensure your engine continues to run at its best.




BACA larrr

Soli boss

Its all inter related..

so our remap is tuned for ron95? i think better tune for ron97, then pour in ron95 to drive like uncle... when need the power and got extra $$ put in ron97 again, then can go race..

Don't think driving stye got effect lo... 95 and 97

Read article la...
Tune for 97.. U put 95.. Knock till ur mother wont reconise later.. U see the second article I post.. Tune for ron102.. Run on 98.. GG