KKtrips Posted October 19, 2013 Share Posted October 19, 2013 Anyone have real life experience with octane booster to help cure detonation? Car is tuned perfectly but with timing set at TDC yet it still detonates on throttle mash above cruising revs. Not after problem diagnosis just your experiences with octane booster and what brand worked. Cheers. Quote Link to comment Share on other sites More sharing options...
UTERUS Posted October 19, 2013 Share Posted October 19, 2013 I used to have an AE101 Levin, 20v 4age. It would detonate on anything except 98 so i experimented with NOS brand octane booster when I wanted to doort and only had 95 handy. Audible detonation went away after getting jiggy with the octane booster. 2 Quote Link to comment Share on other sites More sharing options...
KKtrips Posted October 19, 2013 Author Share Posted October 19, 2013 Nice. Did you mix in quantity recommended or did you tip the can for Max boost? Quote Link to comment Share on other sites More sharing options...
mattscort Posted October 19, 2013 Share Posted October 19, 2013 Used it in a worked 4k KP, didn't really help that much. Detonation went away but returned intermittently even if I hadn't finished the tank of gas that I had added it to. I used that NOS stuff, or may have been wynns? Tuned car correctly about 2 months later and ran it on 95 sweet as. Worn distributor drive gear was the problem in the end. 1 Quote Link to comment Share on other sites More sharing options...
Alfashark Posted October 19, 2013 Share Posted October 19, 2013 You can bump your effective octane rating up a notch by adding 10% meths to the tankful - I used this regularly in my first Alfa when we shifted over the hill, as there's nothing but 95 close by. It also helped that I had a bulk source of meths. You'd need to fatten your mixture up a bit though... Quote Link to comment Share on other sites More sharing options...
UTERUS Posted October 19, 2013 Share Posted October 19, 2013 Nice. Did you mix in quantity recommended or did you tip the can for Max boost? I don't remember sorry, 16 year old me probably poured the whole thing in. Quote Link to comment Share on other sites More sharing options...
durty Posted October 19, 2013 Share Posted October 19, 2013 Hydrazine? 2 Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted October 19, 2013 Share Posted October 19, 2013 Mothballs. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted October 19, 2013 Share Posted October 19, 2013 Mothballs. Quote Link to comment Share on other sites More sharing options...
flyingbrick Posted October 19, 2013 Share Posted October 19, 2013 Mothballs. Quote Link to comment Share on other sites More sharing options...
vivaspeed Posted October 19, 2013 Share Posted October 19, 2013 I've used the fuel system cleaner / octane booster before and it seems to do the trick, but can get spendy for an everyday use thing. I think it was this one. At V8 fuel volumes you'd need a drum of it... Just fix the underlying mechanical problem which causes the detonation Quote Link to comment Share on other sites More sharing options...
cute wee gem Posted October 19, 2013 Share Posted October 19, 2013 Do you have Gull 98 E10 where you live? I'd give that a shot if you do as the ethanol in it is less prone to det than normal petrol. I've got a 4agze which are prone to pulling a shit tone of timing out at 5500rpm onwards if they detect knock (seems to be more common on ae101s). it's an instant loss of power you can really notice. I only run it on E10 as it's the only fuel that it runs on properly and pulls like a champ above 5500 now. Had an old carby/points Corona that pinged like mad on 95, E10 solved that too and ran much nicer Quote Link to comment Share on other sites More sharing options...
AllTorque Posted October 19, 2013 Share Posted October 19, 2013 I wouldn't put E10 fuel in anything with a carb. It absorbs moisture and eats rubber. 3 Quote Link to comment Share on other sites More sharing options...
HighLUX Posted October 19, 2013 Share Posted October 19, 2013 Touline? If thats how you spell it. Buy it in bulk from painters supply shops. It can eat rubber if its left in the tank for a while though. Maybe PM fishtail fred he used it in his crazy turbo ute with good results Quote Link to comment Share on other sites More sharing options...
cletus Posted October 19, 2013 Share Posted October 19, 2013 i talked to a guy who used to buy that^ in bulk from a chemicals place, they locked him in the DG store and called the cops, apparently meth cooks use it KK, is your timing set at tdc and it still rattles? ie 0 degrees btdc 2 Quote Link to comment Share on other sites More sharing options...
hmmmnz Posted October 19, 2013 Share Posted October 19, 2013 in true red neck style we used to put in some kerosene or diesel if there was a pre det problem, used to work a treat Quote Link to comment Share on other sites More sharing options...
Spencer Posted October 19, 2013 Share Posted October 19, 2013 We talking 308? am going to ignore that you said no diagnosis. Is it pinging on 98 fuel? If it is and your motor is stock compression it isn't the gas buddy, its carb or ignition. Or maybe carbon. Off the shelf octane boosters can die. 4 Quote Link to comment Share on other sites More sharing options...
cute wee gem Posted October 19, 2013 Share Posted October 19, 2013 I wouldn't put E10 fuel in anything with a carb. It absorbs moisture and eats rubber. There are a lot of myths around about Ethanol, don't beleive everything you read on the internet eh. Never had a problem myself and I also run it in an 80s motorbike with vacuum hose for fuel line which is still in one peice.. 1 Quote Link to comment Share on other sites More sharing options...
cute wee gem Posted October 19, 2013 Share Posted October 19, 2013 If you have water in your tank you're fucked to start with tbh. It will absorb moisture, yes, but it then gets burnt off by the engine anyway and won't harm anything. E10 is all I've ran in the Gemini since last sept with factory carb fuel lines as the return and factory fuel tank. It also sat for a few months outside during winter while I built and swapped in another engine. 1 Quote Link to comment Share on other sites More sharing options...
punkoutnz Posted October 19, 2013 Share Posted October 19, 2013 E10 is only a problem if stored, a nightmare in boats but not so much in cars. I've tried a couple of octane boosters in my old pulsar wwith 12.5:1 compression and none of them worked as well as just running the better fuel. 1 Quote Link to comment Share on other sites More sharing options...
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