E85 + 100% meth. What is the octane?
E85 + 100% meth. What is the octane? Posted here because the fuel section does not have the response rate we do in the FI section.
I hear that 93 and meth comes out to around 116 octane.
Made me wonder what it was for those of us who run E85-E90+ meth.
The 93 goes to 116 with it being a 23 pt gain so E85 being 105 roughly would surely not gain the same 23 points.
I hear that 93 and meth comes out to around 116 octane.
Made me wonder what it was for those of us who run E85-E90+ meth.
The 93 goes to 116 with it being a 23 pt gain so E85 being 105 roughly would surely not gain the same 23 points.
You would need to know the pressure delta over the nozzles as it varies with boost and pump pressure, depending on your meth controller. Flow dynamics of the orifices would also play a part in fuel mass delivery, however more negligible. That combined with the amount of fuel coming from the fuel injectors will determine the octane of the mixture.
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I know guys running e85 with meth mixed in the fuel, no intercooler, over 20 lbs of boost, and is running in the teens in the 1/8th. Clearly it works if you figure out the correct ratio to mix
This is what I will most likely be doing with my car. 3 nozzles with one of those nozzles pre compressor and E85 and NO intercooler . I will probly run c16 with the meth in the mean time.
It should be over 100 octane easily. I don't run e85 but I am running two M15 nozzles with 100% M1 meth and sometimes mix 98 unleaded with my 93 to achieve a little extra octane and detonation protection.
When I ran 3 15gph nozzles on my old turbo car, I calculated my methanol to be providing roughly 20-22% of my WOT fueling.
I can't remember how I calculated it, but I ended up with a 105-107 effective octane rating when using 93 pump gas.
I can't remember how I calculated it, but I ended up with a 105-107 effective octane rating when using 93 pump gas.
I considered this myself at one time, but would have no idea where to go with the AFR
To try something new...
Not saying i am, but ive thought about it. Once the car is up and running, who knows what ill mess with.