Cheers FDS.

Turns out I can't even get E85 [which is what I think would work] here in SA. I spoke to someone who works in the petroleum industry and E85 is currently only available [via big-name agents like BP, Shel etc] in VIC and NSW.

Unless I run BP Race Fuel which is rated at 110. I don't think that's very practical though.

The highest ethanol blend available via pump is E10 and maybe E20 here in SA, unless I get ahold of some to mix in myself.

Quote:
Re E85 - this is 85% Ethanol (and therefore 15% gasoline). From articles I've read Ethanol has less energy content than petrol (hence V8 Supercars having to run richer mixtures/burn more fuel/more fuel stops last year).

11:1 is about the max for pumpgas. I run Avgas (110) in my racecar which is 13:1 CR.

I know that it's an ethanol/gasoline blend, but I can't seem to find any decent info on it's performance. I would think it'd burn cooler which is also a good thing, meaning it isn't such an aggressive fuel as standard or premium pump fuel.

Datman141 probably runs this ratio in his race-car so I guess that sorta says something about what I ought to do... drop the compression.

Nick, you could just run a water/methanol injection mixture activated by a Hobbs Switch, especially seeing as you application has only a single induction vesse. Maybe make it kick in at 10psi or so just to keep things smooth. There are heaps of smart little water jets and nozzles available now to use for injection [so don't bother with the washer bottle setup!]. As long as you have a powerful pump and a good nozzle you should be able to achieve good atomization to cool the charge down nicely and stop premature detonation.

meth inj it meth aint that much and from memmory jmac can tell u where u can get it from and the other names for it!!

ill be doing the same thing once i finish my sc motor build!!

thanks nick

That's what I want to hear 2QK4U!

Yeah Nick, E85 sounds okay but there is some confusion [on my behalf] of the RON and AKI rating, I don't know what the RON [Research Octane Number]actually is.

Can anyone clarify on E85?

At the moment I'm basically looking for Compression Ratio VS Octane figures. However it's looking more like decreasing the comp ratio slightly and putting some decent advance[?] on the spark.

I MAY be able to get away with some timing advance and some bottled stuff but I really don't like bottled stuff.....just don't trust it.

Chris

Correct me if I'm wrong buy dat141 runs 12.5. On pump.

wat bout e85 or is that meth??
a mate was tellin me u can get 100oct from somewhere just cant remember.
in my sc setup i was runnin 98 plus a full bottle of pro strength oct booster and it was better then just 98 by it self a little less ping

104 octane--- gee lpg has that lol

Okay, is there such a thing as good octane booster?

I'll most probably run a spacer shim/gasket to keep things fairly tame. I might as well calm the whole engine down, it's a bit too much at the moment with the cam etc.

If anyone knows of anyone running high comp ratio successfully on pump fuel [in a street application] please let me know, this'd be mighty helpful.