Pros, cons and dangers of 120ron fuel in an fd

[leefitz]

Hey, Whats the pros, cons and dangers of 120ron fuel in an fd? Both standard twin setup and a single turbo conversion? Cheers

[carlbrainiac]

Who on earth does 120 Ron fuel? :-o

[leefitz]

Ha haa, some lad a mate of mine knows can get it. No clue where it comes from yet but seeing as these engines are the way they are, it would be a shame for him to use it and do harm. Or me on my engine too for that matter. Expensive stuff though

[davehg]

you sure its not av gas?

[leefitz]

Woops, my balls up. 115ron race fuel.

[carlbrainiac]

Why not just pour some vodka in ya tank and be done with it? lol
 
Hmm that\'d be interesting at the pumps. One for car, one for me, one for car, one for me lol

[leefitz]

you sure its not av gas?

Sorry man, that didn\'t come up earlyer for some reason. I dont have alota information about it but I\'m more interested in what the effects of such a high octane or av gas is on the engine? My engine is standard bar non sequential setup and knight sports ecu. I don\'t believe I will benefit with the higher octane but would my mate running a single turbo on PFC?

[leefitz]

Why not just pour some vodka in ya tank and be done with it? lol
 
Hmm that\'d be interesting at the pumps. One for car, one for me, one for car, one for me lol

Ha haa, and if price per litre stayed the same, there would be alot of drunk men standing round petrol stations ;P

[rx7boy]

Benefits of higher octane fuel

• reduced risk of detonation (leading to allowance for more boost)
• timing can be advanced to gain more power
• better fuel economy if mapped correctly

All lead to more power, however race fuel is not cheap and once you map for it, then you have to use it otherwise sticking lower octane will make your engine pop under boost.

[leefitz]

Cheers, thats the bits I understand but how much of a benefit if any is someone going to see with using it? He\'s only talking about trying it out and not changing his map so I wasn\'t sure if he will see a benifit. To make use of the fuel, im asuming it would need to be re mapped.  Could there be a negative effect if the car wasnt mapped for it?

[Grant Monkhouse]

If you put it in the car you will gain a few hp, might be noticeable.... Just.  All turbo charged cars benefit from higher octane fuel whereas na cars don\'t.

I can\'t see there being any risk of using it in the car, it\'s like running your car on normal morisons petrol and then sticking vpower in it.

[shaunwil]

Also depends on the scotch level of the fuel. Look at E85, its got higher ron but you need to run more of it because the scotch value is lower.

LPG is the same, higher ron but lower scotch.

Shaun

[leefitz]

Mmm, never come accross scotch level before.  Well I couldn\'t speak for his setup but on a standerd system like mine. Could I push the boost up much with higher than 97 fuel? Currently it\'s about .7bar and from what I remember from reading, much higher and I will be putting the injectors under to much stress?

[philiwily]

Think Shaunwill was talking about the stoich level, its a good point.

[leefitz]

Is stoich a way of measuring the quality of the fuel, apart from the octane? That\'s prob a google question but is there a home kit style way of testing both these levels on the fuel I by, be it 97 or other?  BTW there\'s no shell/BP garage near me to even trust that was getting good fuel :S