After searching the site I see there is very little conversation in general, let alone non-anecdotal conversation about race fuel concentrates (VP Octanium and Torco Accelerator are the only ones I know that have a high degree of trust and reputation).
Across four different type of two stroke engines (KT, HPV, PRD, Rok GP) I’ve been running E10 91 fuel with race fuel concentrate for several years now and have never had any issues (performance or reliability) that I can trace to the fuel I’m running, but as I’m moving to what is the most aggressive engine configuration I’ve run so far (e.g., a Super Rok, which is just a Rok GP that has 3mm more advanced timing and a more aggressive coil that increases the RPM limit by 2k) I figured it would be good to brush up on my fuel-foo.
If anyone has any specific experience or dyno backed information in regard to race fuel concentrates please share.
Similarly, this thread is attempting to rise above the level of discussion which tops out at ‘Well, my engine builder says to use x-and-such fuel and I’m not risking my investment to save a few dollars’. Those conversations are all over the internet and I’m looking for something more concrete and fact based. And of course, if you’re racing this conversation hardly matters, because you’re going to be running whatever is regulated by your ruleset or else getting disqualified.