memphisr24

There's a gas station not TOO far from me that my friends are telling me sells 100 Ocante unleaded gas. Could I run that on my car with a cat and a tune? (i have hptuners)

I'm definately trying it if no one says anything bad about it

sethallen

if you know how to properly tune it I would say yea

memphisr24

Because i've heard e85, which is equivialent to 104 octane, can ruin your fuel system, unless obviously, your car is able to run on e85

*TRIX*

i think i was told that that gas is leaded tho the e85 ****

memphisr24

Hmm...well i'm definately trying this then, crossing my fingers that I can get rid of this knock without running 14 degrees of timing...yes 14....2.5 pullied and I get smoked my gm stage 2 guys...if I don't get rid of it, i'm putting her away for good

pierre

How is your AIT2 temperature doing?

Pierre

shortyhend2004

hahaha I know people who run 115 on their srts leaded, I'd say your fine for an ocasional 100. I mean we can get 110 locally unleaded, 5 bucks a gallon.....

TVS_SS

unleaded 100 would be perfectly fine.

Only benefit will be if your knock limited and can optimize your timing (no that doesnt mean advance it as far as possible).

Otherwise, 100 octane has slightly less engergy content for the same amount of fuel. Actually 87 has the highest energy content! (But benfits in optimized timing far outweigh any minor energy content decrease)

sethallen

e85 is bad for a fuel system because ethanol is corrosive. therefore you need a car made for e85.

runnin 100 octane fuel will not have a bad effect on your fuel system

LaserblueSS

iTrader: (1)

man, i cant find anyone who sells over 93. i just wanted some for fun.

Cobalt_Supercharged

Exactly. Blown 4-banger was running only 100 unleaded for a while. It allows you to run a lot more timing. He has it at 25* with his 2.6" when running on 100 octane, zero KR.

Memphis you should really talk to Blown 4-banger about what you need to do to get your car tuned in right. Higher octane is just a temporary fix for improper tuning.

boostbalt

Oh that's just a touch more then I was paying for 91 octane (I'm in Canada, it was 126 a liter). You guys shouldn't bitch about fuel prices. Come up north and see how much a gallon would cost ya.

Ryan

Blown 4-banger

X2! Oh, and I'm sure Cobalt_Supercharged did a typo, but I'm running 23-25.5 degrees depending what tune. My pump gas tune only run 15 degrees, so memphisr24 I KNOW HOW YOU FEEL!!!! I can run up to 26.5 degrees of timing without knock on 101 octane, its amaizing how much the stuff helps!

patathSS

You need some W/I. 91 octane, 2.6" pulley, 23 degrees of timing

Blown 4-banger

No thanks! I don't like the idea of injecting anything other than fuel into my motor.

Cobalt_Supercharged

Oops. I could have sworn I heard you say you ran 28 at sometime or another.

Blown 4-banger

No way. 28 would be pointless, thats too much timing. I'v found the at least with my car it seems to make the most power at 25.5 degrees.

patathSS

Hey its a ton better than knock!

Blown 4-banger

What about when the water injection system fails and you blow your motor?

patathSS

Its just as easy to say what will you do when one of your injectors fail and the engine blows? Its all a matter of monitoring. Wideband, Interceptor, And a W/I indication light. The car is still tuned safe.

Would I prefer to run 100 unleaded? You bet. But for my occasional spirited driving W/I is amazing.

Blown 4-banger

It doesn't bother me having to flash the 101 tune on it. Its one of the reasons I really want that stage 3 PCM provided its not locked.

aj_92rs

Ethanol isn't corrosive. The water is causing the problem. Ethanol retains water, unlike gasoline. That's what causes the corrosion

mattyfinch

i run 23-25 degrees of timing on methanol/water injection.

the snow people claim your cars octane level is well over 100 during the spray.

p.s. blown, how did you shred your belt like that?

sethallen

yea..the ethanol retains the water thus making e85 have corrosive properties

either way

Blown 4-banger

Worked on the car from 6pm to 5am, and put the belt on wrong