Quote:
Originally Posted by TongMan
There's a YouTube video showing about 15whp gain by using 100 octane race gas. I'll find it and post it later.
|
That was some sort of oxygenated blended fuel -- not just higher octane.
I hate to say it, but without hard data (e.g., timing log, dyno run) there's no way to know if it's in your head or not... the ECU does so much adjusting over the course of a normal drive due to ambient temp, intake temp, oil temp, etc. it's really tough to say.
Also, the pump gas in other parts of the world may have fewer impurities, but it is NOT generally a higher octane -- they just use RON instead of the RON+MON/2 = AKI we use in the US, and RON is scaled several points higher for the same actual octane. A good rule of thumb is to multiply RON by .95 to get approximate AKI equivalent (i.e., 96 RON = ~ .91 AKI).
FWIW, I would say if you are ready to spend over 8 bucks a gallon to fill your tank, pick two days when the weather will be about the same, and schedule 3 dyno pulls on each of those days at the same shop.
Run three times each day, allowing cool down between runs for approximately equal oil temps (will pull a little timing over 205* F or so I'm told); one set of runs on 93 and one set of runs on 100. Use SAE correction.
If there's a measured difference found -- great! If not, then you'll more than make back the money spent on the dyno runs in savings on fuel.
If you do it, send me the drf's and I'll even make up the dyno comparison charts for you.