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Thread: 87 octane with DE ecu?

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2014-03-26 01:54:15
87 octane with DE ecu?
I'm pretty sure that no one else really is running a DE ecu in their VE set up but I am lol I've noticed that I wasn't able to get pinging with my timing even advanced to 26 degrees on 91 octane ( timing is @ 23 right now) so wouldn't 87 be just fine to run in it? I'm probably going to put a few bucks next time my gas light comes on and listen for any pinging lol but what do you guys think? obd2 g20 sr20de ecu

Yes the extra $2.50 a tank matters when you're on workers comp making 75% of what your used to lol
Last edited by 92SentraSE-R on 2014-03-26 at 01-59-26.
2014-03-26 02:19:29
My vvl was on a manual g20 ecu recently. I have also used the automatic one prior to that. It ran great and i got 28mpgs
2014-03-26 02:34:12
Originally Posted by pan_duh
My vvl was on a manual g20 ecu recently. I have also used the automatic one prior to that. It ran great and i got 28mpgs

Yeah mine runs amazing as hell lol no problems really to complain about (ran a 14.4 @ 97 mph with shitty all season tires lol) but have you ran 87 octane? I've seen 28 mpg only when i'm going all highway miles lol and have got it up to 45 or so once but haven't been able to touch it again..
2014-03-26 04:29:20
I run 93 octane at all times
2014-03-26 04:45:46
Originally Posted by pan_duh
I run 93 octane at all times

Lol I couldn't even run 93 if I wanted to haha

So anyone know if, with the stock DE ECU on a VE, I can run 87
2014-03-26 09:10:58
all in Russia say that you need to use 98 for SR20Ve, but sometimes I use 95 rides him worse
to mine 87-92 it will be very bad motor. the ignition angle should stand as 6 - 7 degrees, SR20De and 15 degrees, and stands the other motor, so it can be used, and 92
Last edited by VOVANыч on 2014-03-26 at 09-16-40.
2014-03-26 23:11:14
So anyone? I think I'll just have to try it out and let you guys know lol
2014-03-27 00:15:11
Make sure go WOT lots of times. Don't worry about it. that .5 difference in compression couldn't be a big deal anyway.
2014-03-27 00:16:57
Personally, I would never do something like this. Running 23* base timing with 87 octane fuel in the warm environment that California brings...seems like a recipe for disaster. Maybe some top dog tuner will chime in with contradictory evidence but until that happens, I say it's a bad idea. In my eyes, what you are thinking about doing, is similar to tuning on the edge. Most tuners will not push the absolute max timing in each cell as you want room for changes in temperature, variations in fuel quality, etc.. You should always leave a margin for error and otherwise. Maybe you can get away with it, even for a short period of time, but if it is at the expense of your pistons (ringlands) and piston rings, is it worth saving a buck or two in gas? Maybe you can have one less cup of coffee a week to make up for the difference?

Also, how are you measuring the "pinging"? At idle? It is usually easiest to hear at idle and while under low load condititions? Now, throw a loud VE into the mix, with (probably) a loud straight-through muffler and I'm betting if there was pinging happening under load, you would NOT be able to hear it. How do your plugs look right now?

If you are going to go ahead with the experiment, humour me and do a compression test now, and then after a month or two of running with the 23*/87 AKI combination.

Good luck either way!
2014-03-27 00:44:53
He needs to save that 2.48 on every fill up. I'm assuming he wasn't going to try and race people with 87 pump gas on a some what high compression motor. I'm sure he knows the sound of pinging too..... or I hope he knows what it sounds like before he kills his motor lol.
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