supradriver Posted February 11, 2008 Share Posted February 11, 2008 If your running a standard UK, you will probably benefit from running normal UK fuel, as thats what the cars been mapped for. You might see slight benefits from Vpower etc, but its not absolut a must. If your running a jap spec car, best to stick to highr RONs as thats what they use in jap land so will be mapped for it, lower rons MAY cause knock (especially in turbos) If your running a tuned car, especially a turbo with higher boost, higher RON fuels become more of a must. You can use normal fuel in any car, just dont boost the nuts off of it or you might start melting your pistons. What did you mean by this bud?? (MAY cause knock) Quote Link to comment Share on other sites More sharing options...
Supranature Posted February 11, 2008 Share Posted February 11, 2008 What about off-the-shelf octane boosters? Quote Link to comment Share on other sites More sharing options...
keancy Posted February 11, 2008 Author Share Posted February 11, 2008 Thing is with the Octane Boost, the bottle is almost £9 for I think 50 litres of petrol so in my case 50 liters of unleaded at a petrol station 6 miles away from me would cost me £54.45 + £9 for booster. 50 litres of Super Unleaded at the nearest petrol station that has it, 12 miles away from me, would cost me £55.45, so I wouldn't save an awful lot. May aswell then go for the higher octane fuel. Quote Link to comment Share on other sites More sharing options...
Supranature Posted February 11, 2008 Share Posted February 11, 2008 I was wondering was it ok to use in the event of being unable to get 99oct fuel? Quote Link to comment Share on other sites More sharing options...
adam bell Posted February 11, 2008 Share Posted February 11, 2008 What about off-the-shelf octane boosters? these additives were tested on 5t gear and they gave a lower bhp reading after a dyno run. Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 11, 2008 Share Posted February 11, 2008 Some clarification required here perhaps! High octane fuel staves off Det, det kills engine, make your own choice. NA is fine on normal or super, using higher grade is NOT a bad thing, just not neccesary Higher octane than 'the japs' or 'the UK is designed for' is also ok, it just runs better/less chance of det on long motorway drags. ON BPU, IMO Vpower is a minimum unless pootling around off boost in the winter. Most additives dont increase the octane rating more than a tiny percent, not without putting about 2 gallons in, and then its risky anyway. Quote Link to comment Share on other sites More sharing options...
Guest raji Posted February 11, 2008 Share Posted February 11, 2008 run on v-power in my uk tt with bpu... tho it seems to bite more and more out of my wallet each month- and april rises wont be helping matters! Quote Link to comment Share on other sites More sharing options...
Supranature Posted February 11, 2008 Share Posted February 11, 2008 these additives were tested on 5t gear and they gave a lower bhp reading after a dyno run. _ Think I've heard about this, but purely as a means to an end-ie.negatating potential damage and eliminating knock, do they serve a purpose??????????? Quote Link to comment Share on other sites More sharing options...
supradriver Posted February 11, 2008 Share Posted February 11, 2008 whats (knock) iv not come across this?? Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 11, 2008 Share Posted February 11, 2008 Knock is Det (or detonation.) Its fuel exploding and not burning and its what will kill the engine, have a search Quote Link to comment Share on other sites More sharing options...
DannyB Posted February 11, 2008 Share Posted February 11, 2008 I used 95 in my Bmw the other week, got 60miles to 20quid used 97 the week after and its alot higher (100ish) Same driving styles too Its obviosuly watered down round here lol but you will notice gains I always used 97 in the Supra Quote Link to comment Share on other sites More sharing options...
Ian R Posted February 11, 2008 Share Posted February 11, 2008 Unleaded in the NA vpower in the single Quote Link to comment Share on other sites More sharing options...
supradriver Posted February 11, 2008 Share Posted February 11, 2008 Knock is Det (or detonation.) Its fuel exploding and not burning and its what will kill the engine, have a search i will do Quote Link to comment Share on other sites More sharing options...
supradriver Posted February 11, 2008 Share Posted February 11, 2008 Iv had a search and I don’t know how you would notice if you would have knock, det. Any one know???? Quote Link to comment Share on other sites More sharing options...
Wez Posted February 11, 2008 Share Posted February 11, 2008 at this thread. I stick any old super and even normal unleaded in the NA Vpower or BP ultimate and nothing else in the turbo, possibly some race gas but not bothered yet. If you want to increase the octane of the fuel get some Toluene or race gas Toluene can be used as an octane booster in gasoline fuels used in internal combustion engines. Toluene at 86% by volume, fueled all the turbo Formula 1 teams in the 1980s. http://en.wikipedia.org/wiki/Toluene Quote Link to comment Share on other sites More sharing options...
Wez Posted February 11, 2008 Share Posted February 11, 2008 Iv had a search and I don’t know how you would notice if you would have knock, det. Any one know???? 1.2bar, crap fuel and missing/hesitation would be a slight indication Quote Link to comment Share on other sites More sharing options...
stupra Posted February 11, 2008 Share Posted February 11, 2008 My car was mapped on V-Power, so it's the only fuel I use now unless i'm caught short. If I am caught short and have to use differant fuel, I keep the boost down and have a light right foot. Ian C never heard any det whilst mapping my car with V-Power. Quote Link to comment Share on other sites More sharing options...
Wez Posted February 11, 2008 Share Posted February 11, 2008 My car was mapped on V-Power, so it's the only fuel I use now unless i'm caught short. If I am caught short and have to use differant fuel, I keep the boost down and have a light right foot. Ian C never heard any det whilst mapping my car with V-Power. Same for me, although my last mapping session was done during the vpower shortage so its now mapped on ultimate, therefore it only gets ultimate or vpower Quote Link to comment Share on other sites More sharing options...
supradriver Posted February 11, 2008 Share Posted February 11, 2008 1.2bar, crap fuel and missing/hesitation would be a slight indication In mine when I accelerate It goes smoothly up too about 5k then it seams too dump more fuel in the engine gets louder and it pushes me in my seat more. Is it over fuelling??? Quote Link to comment Share on other sites More sharing options...
Wez Posted February 11, 2008 Share Posted February 11, 2008 In mine when I accelerate It goes smoothly up too about 5k then it seams too dump more fuel in the engine gets louder and it pushes me in my seat more. Is it over fuelling??? How do you know its dumping more fuel in? Seat of the pants dyno assumptions are useless. Quote Link to comment Share on other sites More sharing options...
supradriver Posted February 11, 2008 Share Posted February 11, 2008 How do you know its dumping more fuel in? Seat of the pants dyno assumptions are useless. I don’t know. I guess it’s because it’s all smoother till 5000 rpm then it seams too get a bit of a boost from fuel. Should it be smooth through the whole rev range? If that makes sense lol Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 11, 2008 Share Posted February 11, 2008 I don’t know. I guess it’s because it’s all smoother till 5000 rpm then it seams too get a bit of a boost from fuel. Should it be smooth through the whole rev range? If that makes sense lol I really wouldnt be too worried about det or overfuelling, you have an NA Quote Link to comment Share on other sites More sharing options...
supradriver Posted February 11, 2008 Share Posted February 11, 2008 I really wouldnt be too worried about det or overfuelling, you have an NA why???? Quote Link to comment Share on other sites More sharing options...
fizzle Posted February 11, 2008 Share Posted February 11, 2008 i use 97ron in my 93 n/a, ocassionally tesco 99, depending on where i am! Quote Link to comment Share on other sites More sharing options...
SMiFFAD Posted February 11, 2008 Share Posted February 11, 2008 What did you mean by this bud?? (MAY cause knock) Knock, det, detonation, pinking, just some of the names for it. Its caused mainly by pressure/heat causing the petrol to ignite prematurly in the cylender (before the spark). You tend to get this running higher than normal boost. Its why we use "cooler" plugs and fiddle with the ignition timing as well. Its not a definative formule, you may get away with normal petrol, but you may not... best to air on the side of caution. As has been said NA's wont suffer so badly, as you dont have boost to contend with, BUT jap spec NAs (all NA's i believe?) will probably run better on higher RON, as thats what they were mapped for (in japan) Quote Link to comment Share on other sites More sharing options...
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