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Race fuel in 400ex | Honda ATV Forum
https://www.hondaatvforums.net/threads/race-fuel-in-400ex.95393/
The need for race fuel all depends on compression ratio. I have a 11:1 and i run a 50/50 mix of vp110 and 93 pump gas. If your 13:1 or higher you pretty much need straight race gas to get the full potential out of your engine. With 10:1 or 11:1 you can run straight pump gas premium and be fine. I notice alot less ping with the 50/50 mix i run ...
The 400-Horsepower Tune-up - Reher Morrison Racing …
https://rehermorrison.com/tech-talk-82-the-400-horsepower-tune-up/
The power increase with nitrous is nearly constant across the engine’s rpm range. Unlike a carburetor that increases fuel volume as rpm and airflow increase, a nitrous system that produces a 400-horsepower increase at 5,000 rpm will produce the same 400-horsepower increase at 8,000 rpm. That’s because the volume of fuel that’s being added ...
400ex power increase questions | Honda ATV Forum
https://www.hondaatvforums.net/threads/400ex-power-increase-questions.70874/
SlammedRanger said: The pilot fuel screw on the 400ex carb is there to fine tune the amount of fuel/air at idle and under 1/4 throttle. But it also has a small effect on all ranges of the carburetor. That is why the diagram above has different ranges overlaping. And this is also why tuning is kinda like rocket surgery.
Get the Right Fuel System for Your Horsepower Needs ...
https://www.racingjunk.com/news/get-the-right-fuel-system-for-your-horsepower-needs/
Using 450 horsepower as an example, we’ll show the fuel requirement for two engine efficiency combinations: (HP x BSFC = pounds of gasoline) 450 hp x .5 BSFC = 225 pounds of gasoline. 450 hp x .75 BSFC = 337.5 pounds of gasoline. A gallon of fuel weighs roughly 6.2 pounds. So, our first example uses 225 pounds of fuel, and when we divide that ...
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