sr20det on e85

[Kamillo07]

Hey guys,

I'm thinking of running my built sr on e85.
since I'm running low on injectors 72lbs, cant go any higher than 12psi of boost. with this set up thanks to holley efi standalone im pulling 380hp to the wheels. I need bigger injectors anyways so my question is if it's safe to run e85 on sr engine, what else would I need besides injectors and how big and how hard it is to tune it. I would appreciate any help.
Thanks

[Kingtal0n]

Problem is, you can do 400-500 on pump 93. And it doesn't make a whole lot of sense to shoot for 550+ on an sr20 unless you are dead set on using that particular block (for some reason?)

So why switch fuels?
Unless you just like the idea of E85. It burns cleaner, colder, safer, yeah I get that. But... you lose fuel economy so it's sort of shooting yourself in the foot for a daily when you can keep the fuel economy on 93. Not to mention it complicates and adds a level of expense to your fuel system. And many people do not understand how to tune E85 properly.

[Kamillo07]

I use this car only on track days so I don't really care about economy. And yes I like that idea it burns colder and safer. Just wanted to know how difficult it is to do so.
And if I can get more power without changing a turbo (for now) I"ll do it.
I need to get bigger injectors anyway so if my car goes on dyno i might switch fuels as well.
The actual answer that I'm looking is if the engine will run safer on e85 with more hp than on pump gas.

[Kingtal0n]

I use this car only on track days so I don't really care about economy. And yes I like that idea it burns colder and safer. Just wanted to know how difficult it is to do so.
And if I can get more power without changing a turbo (for now) I"ll do it.
I need to get bigger injectors anyway so if my car goes on dyno i might switch fuels as well.
The actual answer that I'm looking is if the engine will run safer on e85 with more hp than on pump gas.

You can make more power on E85, I have seen that happen plenty of times. But not ALOT more, I would not use that as a sole reason to switch.

And you would really need to do the tuning yourself. If you can handle that, then I say why not, go for it. It's only really "safer" when you tune yourself, and push beyond 400BHP though.

[4x4le]

My last setup i ran on my sr was msd72# injectors with 4 bar base fuel pressure and dual walbros (in tank feeding an inline) with a 2871r and made 376whp dyno dynamics (437whp dynojet) and ran 22psi boost.

This new setup im going to be running id1ks

[RalliartRsX]

Just a few things to note here
1)) The stock SrDET head is simply lacking the flow numbers to support the 500HP on pump as stated below. So 500bhp on pump for the stock Sr head is a little pushing it

In all honesty, it is not nearly as scary as Kingatol is making it out to be. With the ecu options we have and flex fuel sensors, it makes it as easy as
a) Removing all traces of pump (really simple: Just remove the feed on the fuel rail and have it dump into a bucket or whatever while the car is running. This is done in a few minutes
b) Pump in E85
c) Add 30% of fuel across the map
d) Add a shed load of timing
e) Profit!

Add this to the fact that with most standalone ecu nowadays capability to switch maps on the fly with respect to how much E85 content (this is where the flex fuel sensor comes in), it makes it VERY easy!

I really don't know why kingatol make it seems to devilish. Honda boys (yes hate as you may, but the top guys have showed us a thing a two with respect to engine tuning and properly flowing heads), the EVO/STI guys, etc have been running this fuel for over 5 years with no issue.

A bit of advice: Step away from this forum and open up your research to other forums. Alot of people on this forum are still on stock puny T25.

In a dyno I read recently from JK tuning, on a SR20VET, he simply dumped out all pump gas, added E85, and then added 30% of fuel across the map, and he gained something like 40WHP!!

The link is below SR20VE+T E85/93 Comparison (Log manifold/GT3076R/NismoTronicSA)

And the graph
http://www.j-k-tuning.com/NismoTronic/Dynos/Rob%20E85%20SR20VE.jpg


Just saying! Although I agree with a few things Kingatnol says, its much much more simple than you think!
Good luck!

[OnTheChip]

The link isn't working so here it is: SR20VE+T E85/93 Comparison (http://www.sr20-forum.com/turbo/70007-sr20ve-t-e85-93-comparison-log-manifold-gt3076r-nismotronicsa.html)

NismotronicSA has flex fuel support built it when a fuel sensor and Zeitronix ECA (http://www.zeitronix.com/Products/ECA/ECA.shtml) is added. It also has a "fuel pump-out" mode where you can control the fuel pump ON/OFF with the engine not running using the throttle.

[oni jake]

You live in Chicago, go talk to Touge Factory in person to get a sense of what needs to be done and the resources available to you.

[ultimateirving]

Dude e85 is awesome. I ran it on my daily for like a year and didn't even mind. The gas mileage was consistently 17mpg average. You will definitely get more power out of it. Tune is the key as you can advance the shit out of the timing and put a decent amount of power with the same mods. Main thing is injector size. Gotta go huge depending on power goals. I put down 300 hp at 15psi with a t28 and e85. And that was with a mail order tune. Which are very conservative.

[Dboyizmlg]

Irving!^ bing, bing!

E85 will be much safer than than 93 octane! You can't go wrong with E85, the only down side to it might be the gas mileage you get out of it.

But in the long run your engine will be much safer with a higher octane rating (105 octane I believe is the rating for E85).

If I had to choose between 91-93, or E85. It would most deff be E85!

[4x4le]

VS going with flex fuel sensors i like the idea that with the aem v2 you can have a knob for global enrinchment and a knob for global timing you could test known fuel percentages on the dyno to give you a safe idea on how much timing to pull if you needed to pull fuel