adnanshah247 Posted June 12, 2008 Share Posted June 12, 2008 hi, i was advised that wen i get my sup on the drag strip at japfest i should try and get the car to a higher octane level. understandable! whats bugging me is i have done a few searches and found loads of stuff like this:- http://cgi.ebay.co.uk/DYNO-TAB-MAXIMUM-STRENGTH-OCTANE-BOOSTER-TABLETS-x-10_W0QQitemZ220243392429QQihZ012QQcategoryZ122139QQssPageNameZWDVWQQrdZ1QQcmdZViewItem does this stuff actually work or is it a bunch of bull???? any better way of getting higher octance fuel into the engine??? Quote Link to comment Share on other sites More sharing options...
AJI Posted June 12, 2008 Share Posted June 12, 2008 race fuel is an option - engine will need to be mapped to cope with the high octane rating. Unleaded race fuel can be over 120RON. But lower octane values are also available. Octane boosters work ok on the lower grade fuel... ie.RON95... and will raise it by 1or2 points. Many tests in the past show it has little effect on RON97 or higher. (I will try to find the web link for back up of this statement) Quote Link to comment Share on other sites More sharing options...
Thorin Posted June 12, 2008 Share Posted June 12, 2008 The review they did on Fifth Gear showed that the products they tested either reduced or made no difference to horsepower. Don't bother with them. Get some Toluene and use a 10% mix. Quote Link to comment Share on other sites More sharing options...
Pabs Posted June 12, 2008 Share Posted June 12, 2008 I attempted to prove this on an RR in my previous car. 2 runs - same day. With std V-power the results were slightly better than v-power + entire bottle of octane booster. Obviously not 100% conclusive results as soo many variables - but it certainly didn't give me better results as you'd hope. As Thorin said - 5th gear showed a loss in power - I think they quoted around 2-3% loss! Quote Link to comment Share on other sites More sharing options...
and1c Posted June 12, 2008 Share Posted June 12, 2008 The review they did on Fifth Gear showed that the products they tested either reduced or made no difference to horsepower. Don't bother with them. Get some Toluene and use a 10% mix. Can you explain more about the Toluene please? Quote Link to comment Share on other sites More sharing options...
Thorin Posted June 12, 2008 Share Posted June 12, 2008 Can you explain more about the Toluene please? Paint thinners, not particularly nice stuff, but provides a decent boost to octane. A 10% mix is safe, and much better than some tiny bottle. I'm no chemist. Quote Link to comment Share on other sites More sharing options...
bolarbag Posted June 12, 2008 Share Posted June 12, 2008 http://www.gtr.co.uk/forum/upload/2480-octane-booster.html?highlight=octane+booster If you have plenty of time.... The thread actually goes in a few different directions so best read it all, each to their own but its a waste of money imho Better to import race fuel - or spend the money on mods to make your car faster all the time:) Quote Link to comment Share on other sites More sharing options...
Thorin Posted June 12, 2008 Share Posted June 12, 2008 http://www.gtr.co.uk/forum/upload/2480-octane-booster.html?highlight=octane+booster Jesus Christ that old thing, good old Mycroft. Personally I'd avoid reading through all that you'll never get that time back. Quote Link to comment Share on other sites More sharing options...
bolarbag Posted June 12, 2008 Share Posted June 12, 2008 Personally I'd avoid reading through all that you'll never get that time back. Wish someone would have told me that when I first read it:( Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 13, 2008 Share Posted June 13, 2008 A recent magazine did a proper dyno test of most of the common UK bottled additives, a couple were shown to work well 9the 2 most expensive ones i think). I can't recall which they were, but I'll try and find the magazine and report back. If you need more octane toluene at 10% by volume is excellent, cheap and fairly easily available. Avgas 100LL is cheap, and has a good octane rating with perfect consistency, but has lead in it, so O2 sensors need lifing, and cats are a no no. You can't beat buying proper race fuel though. Quote Link to comment Share on other sites More sharing options...
Axle Posted June 13, 2008 Share Posted June 13, 2008 How about sticking in some 102 Octane BP stuff? Expensive mind. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 13, 2008 Share Posted June 13, 2008 You are paying duty for no good reason, assuming the fuel is just used on track, proper race fuel can be higher octane, yet cheaper. Quote Link to comment Share on other sites More sharing options...
JustGav Posted June 13, 2008 Share Posted June 13, 2008 You are paying duty for no good reason, assuming the fuel is just used on track, proper race fuel can be higher octane, yet cheaper. o'rlly..... Hmmm, that is interesting.. I'm still toying with the option of E85 or avgas, depending which one I can source easier for the NA. Any nasties with using the avgas stuff? Quote Link to comment Share on other sites More sharing options...
Thorin Posted June 13, 2008 Share Posted June 13, 2008 E85 requires a special pump and fuel lines designated for use with alcohol based fuels I believe. You'll also need flex-fuel sensors and some way of controlling it all. Quote Link to comment Share on other sites More sharing options...
JustGav Posted June 13, 2008 Share Posted June 13, 2008 E85 requires a special pump and fuel lines designated for use with alcohol based fuels I believe. You'll also need flex-fuel sensors and some way of controlling it all. Yeah, that is the least of the worries, that I can happily do, ironically it is obtaining the fuel that appears to be the issue..hence the reason AVGAS is top of the list. Quote Link to comment Share on other sites More sharing options...
Wez Posted June 13, 2008 Share Posted June 13, 2008 E85 requires a special pump and fuel lines designated for use with alcohol based fuels I believe. The guys in the US have been using the Walbro pumps with E85 and as long as the fuel isnt sitting in contact with ally for any length of time you should be ok. One issue is that to get the same power you need approx twice as much fuel, ie a 500hp supra would need 1000cc injectors or dual stage injection. You'll also need flex-fuel sensors and some way of controlling it all. Only if you want to mix the fuel in your tank, the flex-fuel sensor can determine the mixture of E85 vs petrol which then gives you the ability to adjust timing and fueling, the output from the flex-fuel sensor is not something an AEM understands at the moment which is a shame, someone did look at converting the output into a 0-5v signal but I have not been following for a while. You can however run without a flex-fuel sensor and have a seperate E85 map, this is how I was going to do it but the availability of the fuel has put on a stopper on it for the time being. Quote Link to comment Share on other sites More sharing options...
Wez Posted June 13, 2008 Share Posted June 13, 2008 AVGAS is top of the list. I am interested in this as well Quote Link to comment Share on other sites More sharing options...
Konrad Posted June 13, 2008 Share Posted June 13, 2008 Avgas 100LL is cheap, and has a good octane rating with perfect consistency, but has lead in it, so O2 sensors need lifing, and cats are a no no. Any nasties with using the avgas stuff? Toulen seems to be best choice without fiddling with sensors. Quote Link to comment Share on other sites More sharing options...
Thorin Posted June 13, 2008 Share Posted June 13, 2008 Only if you want to mix the fuel in your tank, the flex-fuel sensor can determine the mixture of E85 vs petrol which then gives you the ability to adjust timing and fueling I was under the impression the flex-fuel sensor was still needed because of the fact that there are different summer and winter blends of E85. Contains less Ethynol in the colder winter months to aid starting? Quote Link to comment Share on other sites More sharing options...
Wez Posted June 13, 2008 Share Posted June 13, 2008 I was under the impression the flex-fuel sensor was still needed because of the fact that there are different summer and winter blends of E85. Contains less Ethynol in the colder winter months to aid starting? This could well be the case with E85 at the pump, its been a while since I looked into it. I was going to try some E85 race fuel which obviously is consistant. Quote Link to comment Share on other sites More sharing options...
Wez Posted June 13, 2008 Share Posted June 13, 2008 Shell Avga 100LL prices :- BOURNEMOUTH (INTERNATIONAL) AVGAS 100LL : 105 PLT LIVERPOOL J. LENNON ARPT (ITP) AVGAS 100LL : 108 PLT ISLE OF MAN (RONALDSWAY) AVGAS 100LL : 112 PLT 105 seems resonable, I am sure there are more supplys about Quote Link to comment Share on other sites More sharing options...
bolarbag Posted June 13, 2008 Share Posted June 13, 2008 Whats the prices in British Kudos? Quote Link to comment Share on other sites More sharing options...
Wez Posted June 13, 2008 Share Posted June 13, 2008 Whats the prices in British Kudos? PLT = British Pence per Litre Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted June 13, 2008 Share Posted June 13, 2008 I run one of the race car on 50/50 Avgas and SUL, the other on proper race fuel as it has a sky high CR Quote Link to comment Share on other sites More sharing options...
Wez Posted June 13, 2008 Share Posted June 13, 2008 I run one of the race car on 50/50 Avgas and SUL, the other on proper race fuel as it has a sky high CR Whats the advantage of a 50/50 mix? Quote Link to comment Share on other sites More sharing options...
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