E85 tune on g37
#1
E85 tune on g37
Hey guys, I'm new to this forum, and I'm getting an ecu tune on my g37 this upcoming weekend, I'm running on CAI & test pipes, but I was wondering if an e85 tune will get me some good numbers & if so, do I have to change the injectors for e85 fuel?
#5
+1 this is pretty much what I am reading on a lot of other sites and on other cars... small hp/tq gain, loss of mileage, use more fuel, etc... If FI and properly tuned, you would see quite a bit more of a gain.
#7
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pump does not need to to be changed, just the injectors. gtr injectors are preferred, if you register for GTRLIFE.com you can find people selling a full set of gtr injectors for 200ish $ shipped. I'm going to go flex fuel fairly soon, if you do decide to go that route, do it right and tune the car for everything from e10 to e85 so you can run any type of fuel you want. also the gains are much better in the midrange vs the top end, the peak numbers are not everything when running e85 on na. you will see much better gains if you are in a state like California that only have 91 grade fuel.
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conkus805 (01-27-2016)
#10
Registered Member
The advantage of E85 over pump gasoline is a higher anti-knock index. Why does one need fuel with a higher anti-knock index? Higher cylinder pressure. What's the cause of higher cylinder pressure? Forced induction, or aftermarket pistons and/or cylinder heads.
If you don't plan on adding a turbocharger or supercharger, and don't plan on going with higher-compression pistons, I wouldn't bother. E85 actually has lower energy density than pump gasoline.
If you don't plan on adding a turbocharger or supercharger, and don't plan on going with higher-compression pistons, I wouldn't bother. E85 actually has lower energy density than pump gasoline.
#11
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The advantage of E85 over pump gasoline is a higher anti-knock index. Why does one need fuel with a higher anti-knock index? Higher cylinder pressure. What's the cause of higher cylinder pressure? Forced induction, or aftermarket pistons and/or cylinder heads.
If you don't plan on adding a turbocharger or supercharger, and don't plan on going with higher-compression pistons, I wouldn't bother. E85 actually has lower energy density than pump gasoline.
If you don't plan on adding a turbocharger or supercharger, and don't plan on going with higher-compression pistons, I wouldn't bother. E85 actually has lower energy density than pump gasoline.
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hooey_b (02-02-2016)
#12
Registered Member
The advantage of E85 over pump gasoline is a higher anti-knock index. Why does one need fuel with a higher anti-knock index? Higher cylinder pressure. What's the cause of higher cylinder pressure? Forced induction, or aftermarket pistons and/or cylinder heads.
If you don't plan on adding a turbocharger or supercharger, and don't plan on going with higher-compression pistons, I wouldn't bother. E85 actually has lower energy density than pump gasoline.
If you don't plan on adding a turbocharger or supercharger, and don't plan on going with higher-compression pistons, I wouldn't bother. E85 actually has lower energy density than pump gasoline.
Gains from E85 (ethanol) on an N/A bolt on 370Z - Nissan 370Z Forum
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conkus805 (01-28-2016)
#13
Registered User
I've been researching this topic for a LONG time now.
with E85, because of the difference in energy density when compared to normal 93/91, it requires more flow. roughly 30% over stock if you're keeping it N/A. GTR injectors or up to 650cc's work great (GTRs are 570cc). Also, at least a 255 ethanol compatible pump as well.
For further reliability, I'd recommend also a modest fuel return so you can put an ethanol content sensor there. Not all E85 was created equal~Ecutek has variable tuning map capabilities that take live feed from the sensor to make the necessary adjustments.
And +1 for what jfisher and conkus805 said. More agressive timing, cooler combustion temps, high(er) anti-knock index. Plus, I dunno where you're at, but here in GA, E85 is about 10-15cents cheaper to the gallon over 87 oct.
I'm just doing things in reverse...getting the fuel setup and e85 NOW before boost, so I don't have to tear into it once it's installed.
with E85, because of the difference in energy density when compared to normal 93/91, it requires more flow. roughly 30% over stock if you're keeping it N/A. GTR injectors or up to 650cc's work great (GTRs are 570cc). Also, at least a 255 ethanol compatible pump as well.
For further reliability, I'd recommend also a modest fuel return so you can put an ethanol content sensor there. Not all E85 was created equal~Ecutek has variable tuning map capabilities that take live feed from the sensor to make the necessary adjustments.
And +1 for what jfisher and conkus805 said. More agressive timing, cooler combustion temps, high(er) anti-knock index. Plus, I dunno where you're at, but here in GA, E85 is about 10-15cents cheaper to the gallon over 87 oct.
I'm just doing things in reverse...getting the fuel setup and e85 NOW before boost, so I don't have to tear into it once it's installed.
#14
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In terms of reliability, that's the point of a tune. With e85, you add more ignition and timing. In terms of gains though, it'll be like 10hp across the band. If u have forced induction plans, then yes. Go for it. But it's really not necessary to be done for a n/a application. It'll be like an ego stroke imo.
#15
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In terms of reliability, that's the point of a tune. With e85, you add more ignition and timing. In terms of gains though, it'll be like 10hp across the band. If u have forced induction plans, then yes. Go for it. But it's really not necessary to be done for a n/a application. It'll be like an ego stroke imo.