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Username Post: e85 question        (Topic#355866)
x inFEKTid x 
Contributor
Posts: 373
x inFEKTid x
Loc: east side of atl
Reg: 04-14-08
04-01-19 05:34 PM - Post#2763442    

why are people, specifically in the hot rod world swapping to e85 gas. I see the slight cost difference but the energy released is not as much. so i see it as you need more fuel to do what gas does.. just wanna know why. i do get the lines ( gas is more corrosive for regular fuel lines ) and such and a few things have to be changed and adjusted .. I just don't see why swapping to it when you need more fuel to do what gas does ..




 




65_Impala 
Very Senior Member
Posts: 4185

Reg: 12-29-02
04-01-19 07:06 PM - Post#2763449    
    In response to x inFEKTid x

Same reason people run alcohol. You can run lots of compression and lots of boost while the engine stays cool. It's some help running N/A and a lot of help when boosted.



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17284
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
04-02-19 06:01 AM - Post#2763472    
    In response to 65_Impala



[​IMG]
14.7:1-15:1 static compression and 12.5:1 dynamic compression,
is generally considered about ideal for ethanol powered e85 engines
if you run e85 in an engine with low enough compression that the engine can be run on pump gas youll see very little benefit from e85 fuel use.
boost the mechanical compression to about 15:1 and get the cam timing
to produce about a 12.5:1 dynamic compression and the engines characteristics and power potential increases remarkably

if you use a low compression engine ethanol fuel provides less mileage per gallon and less power,
but ethanol and METHANOL both potentially can provide a significant boost in power if the engines built with a high enough compression ratio to take full advantage of the higher octane,or knock resistance the alcohol provides, yes it will require about 25%-30% more fuel , but the power potential is certainly available if the engines built with high mechanical compression, gains of 5%-10% or more in peak torque and horse power are rather easily made if the proper components and compression ratio are used to take advantage of the alcohols different burn characteristics and potential.
the problem is that most engines are not exclusively designed to run ethanol.
any engine designed to use both race octane gas and alcohol interchangeably is not designed to maximize the alcohol characteristics,

http://garage.grumpysperformance.co...octane-for-c...



http://garage.grumpysperformance.co...ne-running-a...



IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


Edited by grumpyvette on 04-02-19 07:03 AM. Reason for edit: No reason given.

 
Rick_L 
Honored Member
Posts: 27591
Rick_L
Loc: Katy, Tx, USA
Reg: 07-06-00
04-03-19 01:23 PM - Post#2763587    
    In response to x inFEKTid x

At the prices around here there's no savings because of the extra fuel required. Your mileage will drop around 1/3.

And it's not gas that's corrosive, it's alcohol. So with E85 you're at 85% alcohol instead of 5-15%. So it's more corrosive.

The only advantage is more octane and the cooling effect of 1.5 times more fuel.



 
x inFEKTid x 
Contributor
Posts: 373
x inFEKTid x
Loc: east side of atl
Reg: 04-14-08
04-08-19 03:57 AM - Post#2763801    
    In response to Rick_L

Well now it makes sense .. especially the cr. On boost. Thnx for that insight ..



 




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