This ought to give me some timing back

"Decay buys too many beaters" (decay)
09/26/2014 at 12:52 • Filed to: None

Oregon, your 92 octane pisswater does NOT get along with a 12.5:1 compression ratio.

DISCUSSION (23)

nFamousCJ - Keeper of Stringbean, Gengars and a Deezul > Decay buys too many beaters
09/26/2014 at 12:53

makin' power!

spanfucker retire bitch > Decay buys too many beaters
09/26/2014 at 12:53

Is it turbo'd or something? My car has a 13:1 compression ratio and is designed to run on 87 octane.

Mercedes Streeter > Decay buys too many beaters
09/26/2014 at 12:54

I don't think I want to know how much that cost you...

There's a Marathon station near me that sells 100 Octane fuel for about $9 a gallon. Unsubsidized fuels, eh?

Sweet Trav > spanfucker retire bitch
09/26/2014 at 12:54

Direct injected much?

spanfucker retire bitch > Sweet Trav
09/26/2014 at 12:55

Oh yes. The SkyActiv engines definitely love their DI.

Decay buys too many beaters > spanfucker retire bitch
09/26/2014 at 12:58

Nope, toyota/subaru decided to make the recommended octane for the FR-S factory tune 93 octane. Any lower knocks slightly and pulls timing. It's fine for driving around, but I don't feel comfortable running it like that at track days.

RazoE > Decay buys too many beaters
09/26/2014 at 12:59

Yikes. We only get 91 here in California. Except near Irwindale, I think they have 102?

Sweet Trav > spanfucker retire bitch
09/26/2014 at 12:59

that's why your engine is happy on 87. the fuel is added at the very last minute via direct injection, with a carb and old school igniton timing, on 87 with aluminum heads is max around 10.5-1. 9.5/10-on iron headed cars. I have 10.8-1 compression with an iron headed small block chevy and can only feed it 93.

spanfucker retire bitch > Sweet Trav
09/26/2014 at 13:00

Disregard.

Decay buys too many beaters > Mercedes Streeter
09/26/2014 at 13:00

$15/gallon. But I'm only going to use it as an octane booster for track days (probably about a 10-20% mix depending on where my logs say the engine is happy)

crowmolly > spanfucker retire bitch
09/26/2014 at 13:01

Or filling at a no-name/cheap station?

Decay buys too many beaters > RazoE
09/26/2014 at 13:02

Yeah, no thank you very much. Although much of what I've read indicates that there is not really much difference between Cali 91 and OR 92.

Decay buys too many beaters > nFamousCJ - Keeper of Stringbean, Gengars and a Deezul
09/26/2014 at 13:03

maybe, but in my case its more a matter of

stoppin' knock!

spanfucker retire bitch > Decay buys too many beaters
09/26/2014 at 13:07

Yesh, yeah that's bad. I had no idea the Boxer engine in the Toyabaru required 93, factory tune or otherwise.

Decay buys too many beaters > spanfucker retire bitch
09/26/2014 at 13:12

Agreed, I was kinda pissed when I read in the manual that "the engine is designed to operate on gas with an AKI of 93 or greater, any less may result in audible pinging and decreased performance"

Decay buys too many beaters > crowmolly
09/26/2014 at 13:16

I primarily run E0 92 octane from the local 76 station, but the problem exists no matter what I run. Occasionally I'll get a very fresh batch that gives me IAM of around 1, but the next fill up from the same station might yield an IAM of 0.6 to 0.8

crowmolly > Decay buys too many beaters
09/26/2014 at 13:30

That is pretty shitty. A lot of states only have 91 octane as it is.

Decay buys too many beaters > crowmolly
09/26/2014 at 13:35

I mean they claim "running lower octane will not damage the engine" but considering how much track time she sees, that does not give me a warm fuzzy feeling. The car will react and pull timing from the advance table to work with just about any fuel.

Plus I should pick up as much as 15hp from running a 10% mixture.

crowmolly > Decay buys too many beaters
09/26/2014 at 13:37

Yeah, it's the same type of limp table they put into FI cars. It will go, but it will pull timing and performance.

You don't have a Sunoco in your area?

Decay buys too many beaters > crowmolly
09/26/2014 at 13:40

I don't think we have Sunoco in Oregon. There is literally no source of gas greater than 92 octane at a pump within 6 hours of Portland.

crowmolly > Decay buys too many beaters
09/26/2014 at 14:30

I had a feeling you had already searched high and low before buying a can of VP.

Decay buys too many beaters > crowmolly
09/26/2014 at 14:34

For next season im trying to get a group of other trackrats to go in on a 55 gallon drum of Sunoco 260gt plus. Should be between $10 and $13 per gallon after shipping, but I can't use that much in a year myself.

crowmolly > Decay buys too many beaters
09/26/2014 at 14:53

Yeah, and it does go bad. You can't have gas like that sit all year. An expensive lesson in C12 and C16 for good 'ol Crowmolly.