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Old 22-01-2018, 10:52 PM
RICE RACING RICE RACING is offline
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Default Re: Injection amount vs E85

Quote:
Originally Posted by rotrex View Post
If you run it at a petrol equivalent indicated AFR of 10.2 or about lambda 0.69, you run way too rich in my opinion. That will even promote knock.
Is the 50:50 by weight?
Running so rich in the presence of water reduces burn speed a lot. It costs power.

I'd retune it to lambda 0.78-0.85. No need to run any richer on so much mix.

One of the reasons you might experience more power on e85 is its higher burn speed compared to your current super rich mix.
The ignition timing numbers will not directly be comparable due to the different burn characteristics.
Bullshit!

Have you ever run an engine with proper knock control before you posted this?
I have many times and I can tell you first hand across lots of different set ups that there is direct correlation to excess fuel ration and WM50 rate that shows greatly reduced knock levels as you get more petrol in there. I've run these down to 0.670 L.
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