Making the switch to e85, do I still want to run meth?
Making the switch to e85, do I still want to run meth? I've been gathering up all the parts that I need for my changeover and I'm wondering if I should still keep my meth injection now that I decided to go e85?
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Joined: Sep 2013
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From: Mechanicsburg, PA
X2 Unfortunately it seems the east coast stuff varies quite a bit. And it's not available on every corner either. I'm jealous of the you Midwest guys!
The knock threshold difference between 70% and 85% ethanol is VERY little. Most builds would notice little difference between the two. Guys making 1000+ at the wheels on E50 @ 10:1 with basic LS setups. IMO there's no reason to not run water/meth injection with e85 if it's already installed. I'd suggest a smallish nozzle (5-7gph) with 50/50 to help cool the CC. It's cheap added insurance.
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If I were to run it should I bring it in early like I have or set it up to come in at a higher boost level. If I could eliminate the system all together I wouldn't mind it
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The knock threshold difference between 70% and 85% ethanol is VERY little. Most builds would notice little difference between the two. Guys making 1000+ at the wheels on E50 @ 10:1 with basic LS setups. IMO there's no reason to not run water/meth injection with e85 if it's already installed. I'd suggest a smallish nozzle (5-7gph) with 50/50 to help cool the CC. It's cheap added insurance.
A very well known university did the study and published it. It's been a while since I've read it, I'll try to find it again. They used variable compression ratio pistons and tested knock threshold at different ethanol percentages. Detonation threshold was not linear and results lessened over 50% or so.
We rarely get over 70% here in KS, I run it alot.
We rarely get over 70% here in KS, I run it alot.
Last edited by Forcefed86; Dec 29, 2015 at 03:39 PM.
It is interesting to note that the blending response of RON
and MON as a function of ethanol content is highly nonlinear.
There is a substantial octane improvement between
Regular Gas (RG) and E10, and between E10 and E50. However, between E50 and E85 there is very little difference in either RON or
MON. It is well-established that properties of ethanol gasoline
blends, such as Reid vapor pressure, do have nonlinear responses.
and MON as a function of ethanol content is highly nonlinear.
There is a substantial octane improvement between
Regular Gas (RG) and E10, and between E10 and E50. However, between E50 and E85 there is very little difference in either RON or
MON. It is well-established that properties of ethanol gasoline
blends, such as Reid vapor pressure, do have nonlinear responses.
Goes in depth in the link below.
http://www.nav200.delphi.com/pdf/tec...10-01-0619.pdf
Last edited by Forcefed86; Dec 29, 2015 at 04:10 PM.
I think Zbrown has pretty much proven this point making 1200 hp plus on a 10:1 LS on E50.