race fuel vs. E85
05-24-2010, 07:31 AM
#3
For a stock head and block N/A car, E85 will do nothing except hurt fuel economy (a lot).
For a turbo motor, however, it's a revelation.
In my 2005 Evo I jumped from 300whp to 347whp doing nothing but changing from 100octane to E85 (bigger fuel injectors also required). Fuel economy dropped about 25%.
For a turbo motor, however, it's a revelation.
In my 2005 Evo I jumped from 300whp to 347whp doing nothing but changing from 100octane to E85 (bigger fuel injectors also required). Fuel economy dropped about 25%.
05-24-2010, 09:33 AM
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Agreed with Cracknut. E85 is rated at 113 octane, allowing you to advance timing reliably and yield an increase in HP. I am somewhat convinced that the cooling properties of E85 during combustion are a major contributor to why we are seeing more reliable turbo time attack and race cars (see Momentum and the FI boards).
If you aren't FI'd...you can achieve those octane levels running race fuel without seriously compromising fuel economy...but you'll still need to advance your timing to take advantage of the higher octane fuel and make more power.
Good luck!
If you aren't FI'd...you can achieve those octane levels running race fuel without seriously compromising fuel economy...but you'll still need to advance your timing to take advantage of the higher octane fuel and make more power.
Good luck!
05-24-2010, 05:21 PM
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Originally Posted by PedalFaster,May 24 2010, 06:54 AM
Care to elaborate on your application?
05-24-2010, 05:47 PM
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Originally Posted by juan bardez,May 24 2010, 08:21 PM
supercharged, 1000cc injectors, kpro, currently tuned on e85 making 444whp
Why would you switch back from that fuel when you're making 444whp reliably with a supercharger? Seems like a step in the wrong direction.
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05-24-2010, 07:48 PM
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Originally Posted by rob.ok,May 24 2010, 09:15 PM
It's all about whether or not your plan on bringing a drum to the track with you.
-Rob
-Rob
05-25-2010, 11:35 AM
#9
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I dont know if this applies everywhere, but at the few stations around here that offer e85, it seems different EVERY time i filled up.
I had to retune the car every time. That got old fast.
I had to retune the car every time. That got old fast.
05-25-2010, 11:49 AM
#10
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yeah I run 110 leaded so I don't have to bring a drum of fuel with me. I like knowing that every track will have the fuel I need.
Also some orgs (such as SCCA) still don't officially allow e85 (old rules, supposed to change soon)
Also some orgs (such as SCCA) still don't officially allow e85 (old rules, supposed to change soon)