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max HP TCat, Max (!) PUMP gas HP FBomb trail Cat, Max HP Outlaw Strychnine full mod [even more to come…]

tested stock and with Speedwerx prototype high flow muffler, with both non ethanol and ethanol fuel

compare the optional High Port Riot Kit to the standard Riot Kit tested on 11/22/15

pre and post-breakin, timing tweaks, and low-buck D&D pump gas hopups for the ZR9000

Dyno test: Cat 600+800+turbo, Etec 600+800, Axys 600+800, YamViper+Viper MPI turbo

We dyno test each Riot Kit component separately–LTS head, Ypipe, 2 deg key, pipe, XPS muffler, Bullseyes

FUEL VOLATILITY Jim Czekala, DynoTech Research   “Gasoline doesn’t burn. The vapor of the liquid gasoline burns, and that’s extremely important to remember when you are thinking about controlling combustion in a gasoline engine”. – Steve Burns, CEO of VP Racing...

stale fuel is rampant, testing RVP at home, effect of volatility on combustion chamber conditions

Dave M. complained about poor performance, but was his HP goofing up his clutching, or vice versa?

Compare Axys 800s with 0, 50, 1200, 1200 and 2200 miles–wildly different results!

Homing in on a few issues--primarily lack of HP on some engines. My cousin-in-law Bill Rogers had that first 85 mph Axys that his excellent dealer traded even-up for their 100+ mph demo sled. The dealer had used the demo sled as a donor--swapping every component...

more questions raised by comparing new Axys #1 to new Shootout Axys to Todd’s 1200 mile Axys…

modern thinking on maximizing HP by optimizing squish clearance and engine cooling system design

this is Heath’s Axys originally posted on 10/7/14, has HP vastly different than the one posted yesterday…

Todd

compare HP of this broken-in 2015 to the out-of-the-crate 2014 and 2015 AmSnow Shootout Etec 800s

Erich Long is back, this time with 260HP ECU reflash and 3″ turbine outlet/ quiet muffler

Here's a prototype home RVP test "bomb" (that's what RVP test vessels are referred to!) that I created. It's a 24 oz resealable Monster Energy Drink aluminum can with a small aluminum plate JB Welded to the cap. Two holes are drilled in the plate into the...

Trying to understand how vibrating engines can “shut off” fuel flow..   This has bugged me for years. Why would fuel, turning partially to foam in a vibrating carburetor float bowl, shut off the pressurized flow of fuel through the needle and seat?  The...

compare 120, 150, turbo class dyno results–compare 2015 to 2014 when HP is lower or higher