Anyone running a 100 octane tune (only - no other HW mods) on their W212/M157 and have any feedback on performance gains?

Never seen a dyno on only 100 octane tune but heard anecdotally that the 100 can produce around 640whp which is a decent bump above 600whp that you get from 93 or 91 octane tunes available from the usual tuners like (Weistec, Renntech, AMS, EC etc). thx J

My E50 EC Tune has an equivalent octane rating of ~99 octane when you blend 9 gallons of E85 with 8 gallons of 93 octane..

The car makes ~670 awhp at 18.5psi on this tune when running the blend.

Brutus - hey how are ya? Thanks for sharing that - i thought E50 was more like ms109 octane level but not so, its like 99/100 per your calculator. the E50 at 99/100 octane still produces much more power than straight 100 octane fuel which is amazing

the e85 runs cooler, which is usually given as the reason for more power with equivalent octane

http://www.superchevy.com/how-to/eng...ed-small-block

Eurocharged ethanol tune all day! Assuming E85 is available in your area.