hurricane sandy! 87 octane! Oh boy! - EvoXForums.com

4b11ftw · 10-31-2012, 10:18 PM

I was forced to fill about 5 gallons of 87 octane today because where i was they were out...i always fill wit 93 and was not on empty should i be worried about knocks and harming the motor? I drove for about 80 miles then out another 5 gallons of 93 in and octane booster. Am i being anal?

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dboz · 10-31-2012, 10:29 PM

Just don't boost

4b11ftw · 10-31-2012, 11:07 PM

I hit boost a few times hopefully no damange but it wasnt at WOT...

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xezerax · 10-31-2012, 11:32 PM

Our cars have a low octane map just for this so don't worry, if you're that nervous just don't hammer on it... On a side note all the gas stations I've gone to since Saturday have all been out of 87 because of the hurricane... weird. Still plenty of e-85 though

iamblue03 · 11-01-2012, 01:33 AM

Not to worry at all.... just don't WOT.

r34p3rex · 11-01-2012, 12:57 PM

If you don't boost, you could run 87 exclusively, forever. But then you should consider just getting a base Lancer at that point

HappyMint · 11-01-2012, 01:23 PM

Ummm. I'd never put 87 in my car without following it up with some real octane booster, and a lot of it.... I don't give a shit what "Maps" our car has. Your car is probably knocking like crazy right now. The way it moves to the "low octane map" is by detecting massive amounts of knock. Guess what though, some of the tuners out there, I'm not naming any names, make the high octane and low octane maps the same, effectively making the low octane map worthless and preventing your car from learning about bad fuel and pulling timing in the intended manner. I'd baby the hell out of the car, completely stay out of boost, and go pour in an octane booster (a real one, like the Lucas "real" octane booster - most octane boosters are worthless garbage but the lucas one is actually good). Then mix in 93 as soon as humanly possible.

If your car is tuned on 93, you should never, ever, run anything other than 93. You don't know what type of assumptions your tuner was making about your fueling choices, which is why it's imperative to always run the correct fuel after a tune. The stock car can take shitty ACN 91 or 93 and will work fine, but a car boosting higher thats tuned at more timing at part throttle and even at cruise running 87 octane is a recipe for bad news. Then you consider that some tuners decide to make the low octane map the same as the high octane map, you've got a recipe for even part throttle trouble.

That being said, if you completely stay out of boost you'll probably be fine, but just "not going WOT" isn't good enough. Don't boost AT ALL. Always better safe than sorry.

trick3d · 11-01-2012, 02:23 PM

Quote:

Originally Posted by HappyMint

That being said, if you completely stay out of boost you'll probably be fine, but just "not going WOT" isn't good enough. Don't boost AT ALL. Always better safe than sorry.

This

evi1x · 11-01-2012, 03:03 PM

ive noticed around my area that super and premium are all out...if e85 will be more available during crisis, maybe it's time to switch over..

WraithX · 11-01-2012, 03:05 PM

Quote:

Originally Posted by Prototype-X

ive noticed around my area that super and premium are all out...if e85 will be more available during crisis, maybe it's time to switch over..

Why are you not in NEEVO

10-31-2012, 10:18 PM	#1
4b11ftw Just Spooling Up Join Date: Sep 2011 iTrader: (0) Posts: 313	hurricane sandy! 87 octane! Oh boy! I was forced to fill about 5 gallons of 87 octane today because where i was they were out...i always fill wit 93 and was not on empty should i be worried about knocks and harming the motor? I drove for about 80 miles then out another 5 gallons of 93 in and octane booster. Am i being anal? Sent from my HTC VLE_U using AutoGuide.Com Free App

10-31-2012, 10:29 PM	#2
dboz Forum Lackey Join Date: Jun 2010 iTrader: (0) Posts: 3,803	Just don't boost __________________ Clipse3GT Tune, Buschur Racing CAI/Crossflow CBE, VIBRANT resonator, Mil.SPEC 100 HFC, AEM wideband/ boost gauges, SpeedCircuit UICP, GM 3port, Kidney Thief shift boot, Swift Sport Mach springs, XXR 527's, lots of Venture Shield, OEM side window vents, Recaro VIVO kids seats, Magnus CMC upgrade, ACT HDSS ME1 clutch, HOEN fogs, SHEP TRANS diff pin upgrade, Rally Armor mud flaps, HKS Limited Edition oil cap, WORKS short throw and bushings, AMS gear selector bushing, MITSU DSM leather shift knob

11-01-2012, 12:57 PM	#6
r34p3rex [Local Team Member] Join Date: Jun 2012 iTrader: (0) Location: Boston, MA Posts: 5,581	If you don't boost, you could run 87 exclusively, forever. But then you should consider just getting a base Lancer at that point __________________ ams. downpipe \| intake agp. uicp \| licp \| fmic dw. dw300 id. id1000 isc. n1 coilovers perrin. 3-port synapse. synchronic bov tomei. ti exhaust \| ti test pipe E85 ARMY. 345whp/375wtq dynodynamics. 388whp/394wtq virtualdyno

11-01-2012, 01:23 PM	#7
HappyMint Forum Lackey Join Date: Apr 2010 iTrader: (100) Location: Charleston, SC Posts: 4,599	Ummm. I'd never put 87 in my car without following it up with some real octane booster, and a lot of it.... I don't give a shit what "Maps" our car has. Your car is probably knocking like crazy right now. The way it moves to the "low octane map" is by detecting massive amounts of knock. Guess what though, some of the tuners out there, I'm not naming any names, make the high octane and low octane maps the same, effectively making the low octane map worthless and preventing your car from learning about bad fuel and pulling timing in the intended manner. I'd baby the hell out of the car, completely stay out of boost, and go pour in an octane booster (a real one, like the Lucas "real" octane booster - most octane boosters are worthless garbage but the lucas one is actually good). Then mix in 93 as soon as humanly possible. If your car is tuned on 93, you should never, ever, run anything other than 93. You don't know what type of assumptions your tuner was making about your fueling choices, which is why it's imperative to always run the correct fuel after a tune. The stock car can take shitty ACN 91 or 93 and will work fine, but a car boosting higher thats tuned at more timing at part throttle and even at cruise running 87 octane is a recipe for bad news. Then you consider that some tuners decide to make the low octane map the same as the high octane map, you've got a recipe for even part throttle trouble. That being said, if you completely stay out of boost you'll probably be fine, but just "not going WOT" isn't good enough. Don't boost AT ALL. Always better safe than sorry. __________________ Jacks Built TC SUPER CHEAP For Sale! http://www.evoxforums.com/forums/sho...d.php?t=106425 Sponsored by Hoover Mitsubishi My Blog: http://mancemotorsports.com Build thread with lots of vids: My Dumb (don't read me) build thread BB FP Red. 438whp / 377wtq Self-Tuned. RIP Possum 6/22/2012 Killed by an Evo in the pursuit of horsepower. Last edited by HappyMint; 11-01-2012 at 01:45 PM.

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10-31-2012, 11:07 PM	#3
4b11ftw Just Spooling Up Join Date: Sep 2011 iTrader: (0) Posts: 313	I hit boost a few times hopefully no damange but it wasnt at WOT... Sent from my HTC VLE_U using AutoGuide.Com Free App

10-31-2012, 11:32 PM	#4
xezerax Just Spooling Up Join Date: May 2011 iTrader: (100) Location: LI, NY Posts: 665	Our cars have a low octane map just for this so don't worry, if you're that nervous just don't hammer on it... On a side note all the gas stations I've gone to since Saturday have all been out of 87 because of the hurricane... weird. Still plenty of e-85 though

11-01-2012, 01:33 AM	#5
iamblue03 Just Spooling Up Join Date: Apr 2009 iTrader: (0) Posts: 221	Not to worry at all.... just don't WOT.

11-01-2012, 03:03 PM	#9
evi1x [Local Team Member] Join Date: Oct 2012 iTrader: (100) Location: Boston, MA Posts: 455	ive noticed around my area that super and premium are all out...if e85 will be more available during crisis, maybe it's time to switch over..

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