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E85 Hellcat Turns 753 Rear Wheel HP

by Daniel Bennett on

Serious HP Horsepower Performance released a chassis dyno video today of their E85 tuned Hellcat Challenger making 753 RWHP, which, by traditional measures, is an astonishing 886 hp at the crank — 81 hp and 70 lb-ft more than their standard 93 octane tune. (Estimates of SAE horsepower are by rule of thumb.)

E85, or gasoline with 85% ethanol, can, with proper tuning, generate much more power than 93-octane premium  gasoline, albeit with about a 70% increase in fuel volume.  Along with the fuel change, they added an additional fuel pump that adds pressure and volume to the system, upgraded injectors (larger capacity and E85 capable), upgraded driveshaft, and the HP Tuners 2.25 software.

Power is limited by transmission shifting; if HP Tuners is able to provide transmission-computer support, horsepower levels should rise and quarter-mile times should fall.  Some are already predicting thousand-horsepower Hellcats. (Increasing the power of the engine is likely to reduce its life, and most likely the life of surrounding systems, and is almost certain to void the entire powertrain warranty.)

Dan Bennett was doomed from the start. His parents bought a 1970 Plymouth Road Runner when it was known that he was coming along, and the rest of the story was written from that point forward.
Raised in a Mopar only home, Dan has also been Mopar only. From ’60s, ’70s, and ’80s muscle to current SRTs of various flavors, Dan has owned, and in many cases raced, each of the Mopar brands.
Dan’s real career is as a “parts guy” at a local dealership, but he also is a muscician, computer geek/gamer, avid reader, and general all around seeker of knowledge. His whole working career has been spent in the parts industry, starting in the aftermarket, and now at the dealership level. He took a couple years off and went in a different direction for a bit as a jewelry designer and salesman, and even though he won a design award for a piece, his true calling, automotive, won out in the end.
He has written articles, or has had vehicles that have appeared in Mopar Muscle, Sport Truck, and Truckin’. In various forums and social media, he has made a name for himself as the “Go-to” guy for tech information for all things Mopar. He also has a large background in many forms of racing and engine building, holding at one point a ASE Certified Master Engine Machinist rating. Though he no longer keeps that certification up to date, he is still very active in the engine building side when he has spare time.
To Dan, there is no option to covering the Mopar world, it is an imperative that must be done to keep his world in balance.
You can contact him at (206) 736-7670.


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