Sisky Posted October 22, 2007 Share Posted October 22, 2007 Pickin up my 98 VVTI Tip TT BPU (love sayin all that ) tomorrow Have only 95RON fuel at pumps over here in Ireland. On the bright side I have a PhD in Chemistry and work at a chemical company so can get my hands on toluene easily ( I knew the 8 years in college would come in useful someday ) so will be adding toluene to raise my RON. What is my target - JSpec so is it built for 100RON in Japan. Toluene is 114RON - I've put together a calc to figure out how much toluene to add to a full tank of 70L. works out that need to add 18.5L of toluene to 51.5L of 95RON to get 100RON - thats a lot of frickin toluene to be carrying around in my boot!! 11Litres added would give 98RON - that should be enough ya??? for those interested calc is: supra tank = 70L petrol = 95RON Toluene = 114 RON enter litres of toluene added to full tank here 11 [(70-Vol of Toluene)*95 + Vol of Toluene*95]/70 6859 Resulting RON .........................................97.98571429 also here is a good independant review of differnt octane boosters: http://members.rennlist.com/951_racerx/OctaneBoosterComparison.html most are crap - NF from australia is the best - anyone use that? Quote Link to comment Share on other sites More sharing options...
b_have Posted October 22, 2007 Share Posted October 22, 2007 Investigate toluene mixed with xylene (sp) from my racing days, we were supplied with a mixture of the two together with a smaller amount of MTBE and IPA. These together gave a racing gas concentrate which was added @20% to unleaded 95RON to achieve >103ron. Unsure of the exact quantities of each, but worked well although pretty toxic. Quote Link to comment Share on other sites More sharing options...
Chiefgroover Posted October 22, 2007 Share Posted October 22, 2007 Forget it, just add two Millers CVL turbo with each tank, unless your running massive boost. I can make nearly 600bhp on std unleaded with no knock due to a good mapping job. What single kit and injectors are you running? Quote Link to comment Share on other sites More sharing options...
Sisky Posted October 22, 2007 Author Share Posted October 22, 2007 Forget it, just add two Millers CVL turbo with each tank, unless your running massive boost. I can make nearly 600bhp on std unleaded with no knock due to a good mapping job. What single kit and injectors are you running? saw 1.o max boost in test drive and i won't be pushin the car too hard (will be a second car for weekends) so i'm not to worried about optimising performance just don't wanna do any damage with crap fuel via detonation and other nasties....maybe a rempa to 95RON would make more sense?? injectors are stock i think and don't know what you mean by single kit (I'm pretty clueless mechanically:( Quote Link to comment Share on other sites More sharing options...
Chiefgroover Posted October 22, 2007 Share Posted October 22, 2007 Stock twin turbos @ 1 bar, all you'd ever need is one bottle of CVL per tank, cheap and effective. Single is when you ditch the stock turbos for one big one. Check the site in my signature. Quote Link to comment Share on other sites More sharing options...
Mike B Posted October 23, 2007 Share Posted October 23, 2007 vvti has knock sensors and fbw throttle, so the fbw will close up when it detects knock. In theory you should not be able to blow it up, even if you run it on cooking oil. Quote Link to comment Share on other sites More sharing options...
Thorin Posted October 23, 2007 Share Posted October 23, 2007 Anything you can buy from Halfraud's in a little bottle is snake oil. As a general rule you should use 10% Toluene, I don't know what the effects would be of using too much but I would think 12% would be ok? Adding more and I seem to remember reading you need to add something as a lubricant, perhaps that's the xylene b'have mentioned? Quote Link to comment Share on other sites More sharing options...
Alex Posted October 23, 2007 Share Posted October 23, 2007 70L tank so add 7litres per fill up. You don't need to worry about the it's mapped for 100Ron myth....they heavily overfuel on boost and the VVTi's knock prevention systems are 2nd to none. The ECU will learn to cope. Has anyone got an article where an independent lab has tested CVL? It's just that 5th Gear the other day tested a few of these octane boosters and LOST power... Quote Link to comment Share on other sites More sharing options...
dangerous brain Posted October 23, 2007 Share Posted October 23, 2007 Water injection will also help keep the det monster at bay and is relatively inexpensive. Quote Link to comment Share on other sites More sharing options...
Alex Posted October 23, 2007 Share Posted October 23, 2007 Water injection will also help keep the det monster at bay and is relatively inexpensive. Good call Quote Link to comment Share on other sites More sharing options...
dandan Posted October 23, 2007 Share Posted October 23, 2007 I've still got most of a 40gal drum of Toluene and 10gal of Xylene for those hot days in the summer when you need all you can get to tease the two wheeled brigade. Thanks Charlie I believe we talked about up to 20% Tol, 10% Xyl and a drop of 2 stroke oil for max performance from a homebrew setup. I've never ventured that extreme though to be honest - don't think I've been above 12% additives and that's with no 2 stroke oil added... Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 23, 2007 Share Posted October 23, 2007 .. ..and a drop of 2 stroke oil for max performance from a homebrew setup. .... The homebrew often has transmission oil instead of 2T. But your percentages are in the right ball park;) Quote Link to comment Share on other sites More sharing options...
dandan Posted October 23, 2007 Share Posted October 23, 2007 transmission oil I keep that for my SU dashpots on the real speed machine! Quote Link to comment Share on other sites More sharing options...
JohnA Posted October 24, 2007 Share Posted October 24, 2007 It's meant for lubricating injectors etc if you have particularly large concentrations of of brew. And of course cold starting may be compromised a bit, but hey... Quote Link to comment Share on other sites More sharing options...
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