AVGAS / Racing fuel

[orange dog]

cheers for the info... and the entertainment !

[barty5]

f1 teams run on 95 octane and those engines scream 20,000 rpm plus now thats a screamer

[KLOWN]

f1 teams run on 95 octane and those engines scream 20,000 rpm plus now thats a screamer

zxr 250 will hit those revs, if you take it a little through the red line

[Brian d marge]

Its not about the speed of the engine , octane is there to stabilize the edges of combustion the part of the combustion chamber that hasn't seen the flame , but as the pressure rises the gasoline starts to fracture , and octane slows that process down , if the gas does fracture , separate off its prone to ignition and you get the 2 flame fronts colliding which is your detonation

Anyway , as both Scott and i pointed out you don't need avgas , but if the conditions cause heat , then a poor squish area , timing , carburation will promote detonation so a quick fix could be to add avgas, or re angle the squish , or what ever ...

Good point about the f1 cars , they run quite high compressions , scream to high rpm ,, but run pump gas ( ok tweaked pump gas as the rules allow ,) but pump gas all the same ,,reason is good combustion head shape , and lots of loverly cool gasoline ,,( wonder what ratios they run at ????

Stephen

BTW the above is from the top of me ( v tired ) head late at nite , ,,its as rough as guts but it will do ,,,

[scott411]

f1 teams run on 95 octane and those engines scream 20,000 rpm plus now thats a screamer

i ran ELf race fuel in my motard bike for hte street races ,i ran the blend called WRF, (World Rally Fuel) the stuff may be low in octane but its higher in oxegen and other agents, its expensive but you can feel the difference, I expect Formula one would run somthing similar, hardly tweaked pump gas,

But MR D'marge is right, Avgas is a quick solution to a bigger problem, (and a good one to)