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05-24-2021, 07:08 AM | #1 |
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Pump gas vs E85 on engine strain
I've heard around 215kw/300hp is the safe zone for stock internals and transmission, but I often see cars hitting this, but also going way over with E85, so I was wondering if E85 lets you push more power with less strain on the engine?
Or does pushing a certain amount of power put the same load on the engine no matter whether petrol or ethanol based? Maybe a silly question but just curious since I often see this kind of stuff and am not sure if I'd be putting my engine at risk For example I'm interested in going for this Harrop SC and it lists the power output as 225kW. I wanted to go flex fuel too but I'm afraid that pushing >225kW with E85 would be risky |
05-24-2021, 07:24 AM | #2 |
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The strain on the internals is the same. You have to run more boost to get the same power on pump gas because you can't be as aggressive with your timing as e85 allows.
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05-24-2021, 07:29 AM | #3 | |
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Or would needing less boost mean less strain on the engine? If I was running 8psi or something to get 225kw and then ran 8psi on E85 for more power, would that strain be the same? |
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05-24-2021, 07:39 AM | #4 | |
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Maybe someone with more tuning knowledge can confirm my claims here Sent from my ONEPLUS A5010 using Tapatalk |
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05-24-2021, 07:42 AM | #5 | |
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Not sure where I got the 215kw number but I just want to keep things reliable and I'm completely ok staying with pump fuel at 225kw if going higher is risky |
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05-24-2021, 08:00 AM | #6 | |
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05-24-2021, 08:17 AM | #7 |
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Thanks for the explanation, think I might stick with non-flex fuel pump gas when I decide to go FI then
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05-24-2021, 09:56 AM | #8 | ||
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Also as he said E85 allows you to gain more power through more aggressive timing. The problem with gas is that as you increase boost you increase the probability of preignition resulting in knock. It is knock while boosted that has the biggest possibility of blowing rods apart. The E85 is not as susceptible to preignition which means less chance of knock so you gain power. It is all in the tune of course.
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05-25-2021, 04:38 AM | #9 | |
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I guess it all depends on the tune, I'll have to do some more research |
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05-25-2021, 07:07 AM | #10 | |
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05-25-2021, 11:07 AM | #11 | |
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05-25-2021, 11:47 AM | #12 | |
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