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Old 23-01-2018, 05:48 AM
RICE RACING RICE RACING is offline
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Join Date: Oct 2003
Location: Utopia
Posts: 511
Thumbs up Re: Injection amount vs E85

Miss fire and knock are two different things, so not much point quoting that really.
Was just talking about your statement as its opposite to what I have see these days, using the only knock capable ECU that is proven at places like LeMans (Life Racing/Syvecs).

I've got allot of cars running with much higher energy CDI systems than back then, all on WM50 and regardless of engine type, they will show lower knock with great excess fuel (I have only tested to ~9.5:1 AFR). Each one of them will take more ign timing and make more power when running this with WM50 than they will if run at 0.730L or 0.760L or higher...

Thus I pretty much default to 0.700L myself, this is for cars running 8.2:1 to 9.0:1 CR, petrol and WM50, like the poster here I can't see difference in performance on these combination run to 3500mB (MAP), but do see lots of reduction in thermal stress on the engine and turbo shown by EGT sensors. Only negative is increased fuel use, but given on these cars it makes up less than 1% of time on load then its meaningless to a 'street car' that is raped on road.

Other question is it the meth that needs it?
It's just what the engine demands........ use anything other than a Life Racing/Syvecs engine management unit and you are doing nothing more than guessing as I have not seen anything else (used them all) that can actually run an engine at the knock limit all the time like these systems have proven to do when it counts (in professional endurance racing) not paper/web page or hobby racing series.
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