WELL AS OF RECENTLY I PUT TOGETHER A B20VTEC BUILT AND TUNED on E-85 by yours truly..
motor has 275 static compression 13.8 comp type r head flat valves toda b cams..>> details on my motor can be found in all motor section>>so..long story short moved out of town.went to local gas staion on fumes..as luck has it they ran out of E85 so i was forced to put 93/ron >shell premium in FL well i put about 4 gallons to the half of gallon of E in the tank already.. started up and drove off well about a mile down the road i instantly noticed more torque partial throttle way more response!>> this is cruising at an 13.0- 12.5 a/f now on the 93 a/f ratio. originally with E-85 it cruised at 15.5-14.9 a/f.so seeing it was rich i got brave and punched it>>>well i was shocked to say the least the car had major ***** and was running and 11.5-12.2 a/f ratio WOT! (boosted air fuel ratios) and was pulling hard as ****>> on E85 car WOT was at 12-9-13.2 a/f and didnt run this hard>>>> timing is at 25.00degrees coming in vtec peaks at 7000rpm @27.50degrees then ramps down to 26.00 to redline 8900..this is the first time the car has seen regular gas.. I havent had a chance to plug in and tune for 93 as i orignally thought it would be a ping&detonation party>>> car has no audible ping and plugs look okay obviiously rich but>>im just stumped and wondering if i should pull a little timing and keep the car on 93>> This is the first time i have ever seen gas out perform ethanol>> ANYONE?!?!?!?!?

 

My Boy LSVDA>> says they cutting gas with ethanol so much lol..could be why it only dropped 1-2 points on air fuel/ratio ??? :-0

 

The butt dyno is notoriously inaccurate. Mayhaps your wideband is too.

 

perhaps. or the tune went buckwow for some reason.

 

13.8CR how you figure?

 

e85 does require more fuel so it does makes sense that it'll be running rich as hell.

 

i didnt notice you said you had a wideband in the whole time.

spark quality?

 

Sounds like you are not taking advantage of the E-85 at all. Minimal timing with lean afrs. I've had better power results with running E-85 at 12.3-12.5:1 afrs as well as a decent amount of timing more than 26*. Also, just because the afr is rich doesn't mean it's ok to do pulls on it.

 

s300- hasnt even had the usb pluged in yet..
13.2 as per wiseco, type R head, ferrea flat valves, block decked .012'' thou of in>head shave 0.034" 0.030 +0.004 surface. :headgasket ninja:
i get that lol >> just cant belive it runs so good running rich lol!

Brand New Dizzy,Wires,plugs gapped @ 0.35

owsleeper;48356040]Sounds like you are not taking advantage of the E-85 at all. Minimal timing with lean afrs. I've had better power results with running E-85 at 12.3-12.5:1 afrs as well as a decent amount of timing more than 26*. Also, just because the afr is rich doesn't mean it's ok to do pulls on it.[/QUOTE] t

taking advantage of e-85?? havent made time for dyno...feels streetable with this timing for now *when on ethanol i went higher lower in timing asnd this is what felt and worked racing a new piece o sit mustang the reults were right their.. i went to 29.50 flat curve ...car felt great 1st 2nd kinda 3rd..4th and 5th completly struggling..So... I backed offf 2-3 degrees and 27.50 and less at redline car pulled hard all 1-5..
Im going to lean it out a bit in some areas and lower the timing.. next week.. I will post updates..

 

29 sounds like 93 timing to me.

 

my vtec timing map for E 85 went -2.00 degrees>>for now.. A/f stuck for now time owns me Vtec@5800 timing before vtec is 21.50 increasing to 25.00 right before crossover.

 

13.8+93oct+your ingition map = failure IMO

 

Highest IGN i could run on 93 on a 13.1 CR was around 26 without pinging constantly.. Anything higher and it would show on the plugs..I found the motor made the fastest times down the track @ 24.5-25.0

Current motor , although its alittle lower in CR (12.5) currently sits @ 27 degrees.

 

just fyi, table timing does not equal actual timing.

what you need to do is not run it on pump gas. the only reason its likely not detonating is because you are being easy on it and the chamber is fuel soaked.

your compression is too high to be playing the octane game

 

Thanks for chiming in guys appriciate it! This motor needs to last! ..waiting for that damn gas station to fill up lol.. ethanol tester is also in the works.. i think it was somebody said above..i wasnt taking advantage of e-85 with timing how much would be ran..

@ ALL MOTOR -that car u ran 24.50-25-00degrees on that was pump 93 or E85?

 

Pump gas..
I'm the guy always trying to push the issue, when someone says it can't be done, i'm doing it..

Like blake said, octane games isn't fun.. I ran 13.1 and it was pretty much the dead limit of pump gas. You're to the point where driving the car around , its pinging all the time.

I dropped comp and went bigger, I'm currently on a 85x89 b20vtec, stock sleeves, with wiesco pistons rated for 12.5CR. I do semi daily drive the car..but not every, single day. I bought a G8 for that and I have my GF's GSR civic for that as well, this way, the car can now be 100% geared towards racecar status. You'll make more power on a setup with 12.0-12.5 vs a setup with 13.8 because you're pulling so much timing.

 

simple solution is to DYNO tune each fuel... youll get the most out of it by being able to see what affect certain afr and timing values make...

 

happy to see you back and posting there big man

 

Update: my wideband literally melted itself internally flickered 2 times and dead..kicking my **** thinking my fusebox died.. ughhh ..i duno wtf happened.. i am on the way back to the ethanol station lol..no laptop battery and wideband lol what a bad one..I am sticking to what i tuned the car on ...FML.. On another not i think running more fuel pressure will help with the e85 i am at 45 psi currently thinking of going 55 at the rail and se if maybe its an atomization issue with 3 times the fuel and lack of pressure can give a trickkle effect and not the fine mist... i thank all for responding.!

( THE RESISTORS BEHIND THE LED NUMBERS ON THE GUAGE MELTED NOT THE WIDEBAND)! LOL

 

High egt's will do that.

what injectors are you using?

 

550 RC WITH RESISTOR BOX HIGH EGT WILL DO ????