Thread: SR20VE+T E85/93 Comparison (Log manifold/GT3076R/NismoTronicSA)

Is there something about the gas, besides its octane rating which makes it so superior to regular gasoline? I was always under the impression that a higher octane fuel is nothing but more 'stable' and that's it. You could dump 120 octane fuel in your car and make 0 more whp(without touching timing of course...where here you only bumped timing 1-2* which isn't much). There must be something about E85 which makes more power, minus its octane #.

-G

It's cooling effects is the BIG winner here and not simply octane

Also, this in tail with the "octane" rating allows some ungodly amounts of timing to be ran......which as mentioned before, is where power is made

Curious how this such a revelation to this forum, guys have been making huge power on E85/E98. It is what I ran on the NX when making 600whp. E85 has incredible cooling effects, keeps detonation in check and lets you just dump timing into your maps. On some of our EVO's pushing over 45lbs of boost we ran E98 so we didn't have to deal with VP Import race gas which is ungodly expensive.

Definitely great power gains to the OP. Just makes me laugh so many are surprised as this is not news in the world of tuning

Whats even better, is NOT running leaded fuel and using a cat with E85

So not only do you have the ability to run ungodly amounts of timing, you can burn cleaner, safer and quieter too. Leaded fuel just eats up soo many things.........although, I will admit, nothing smells as good as "jungle juice"

Exactly, we have been using E85 here for a long time on a bunch of stock high compression Honda engines and higher HP engines and making great power on it.

It just so happens that we have an E85 station within walking distance of the shop, so it makes converting cars over that much easier!

But you hit the nail on the head, the reason for the big power gains is simply the cooling affect of the alcohol .. which in this case is a huge benefit because of the restrictive exhaust side.

Surprisingly, like I mentioned in the original post, this comparison was done BEFORE I added any timing into the engine.

I think the idea of E85 isn't so infused into the B13/B14 world due to our tuning options (JWT) never having an e85 tune afaik.



? You did say you added a little timing..

-G

Gomba is correct, tuning is probably one of the main reasons people don's switch to E85. Sure standalone's solve that issue, but most of the people refuse to even go OBD1 for better ECU options, which is a lot easier and cheaper then going Standalone route. Plus you need spend more on bigger injectors, fuel pump, new fuel lines, etc. It's just easier to run 93 for 300whp, bigger HP guys are switching though (Ashton's build, etc.)

Availability is also another concern

Yes, the final tune did have some minor ignition adjustments but if you read the first post, the two plots SHOWN were done right after the E85 switch and were on the EXACT same timing map as the 93 octane tune.



I usually do that to make sure all of the 93 is out of the lines before pumping a bunch of timing into the engine with it still being a bit tainted with 93.

We switch fuels by actually attaching a hose to the fuel pressure regulator return and letting the car run at idle, so there still can be some 93 in the system for that first tank after the E85 switch.

I tried to make this comparison as straight forward as possible .. the pulls were literally done within 10-15 mins of each other with no other mechanical adjustments to the engine.

Honestly, switching to E85 isn't as hard or really that much more expensive as what you guys are making it seem. If you plan your fuel system right the first time with the intentions of running E85 at some point down the road, the offset of the price of E85 vs an expensive race fuel vastly outweighs the initial buy in.

With the new Walbro/Aero/DW ethanol compatible IN TANK 450lph fuel pumps, it makes it incredibly easy to fit an adequate fuel system into these cars to make use of E85 if you have it available where you are located!

I switched to E85 before I had Nismotronic. I had a basic board that was done by Payu along with my emanage. I basically upgraded the fuel system, installed 1600cc injectors and played with the injector size with the emanage. Car made 641hp with that setup. Now with the Nismotronic I don't have to worry about a piggyback which is a big plus. Hopefully it will make more once I switch to MAP sensor.

How about injectors? I know about the fuel pump/lines/filter but do I also need "e85 injectors"?