Hey to all you idiots talkin about octane...

[liljon's924S]

Are you guys dumb or what? The higher the octane in your car the better performance you get. How do you know this... well if you do some reading on the topic any real Porsche info will tell you that the timing is programed to adjust to the changes in octane. So to answer the guys question in "Simple Octane Question" Yes the higher octane the better performance.

Gee Wiz

[yellowline]

How do you know this... well if you do some reading on the topic any real Porsche info will tell you that the timing is programed to adjust to the changes in octane.

In early cars, there is no automatic mechanism to compensate for octane.

High octane also benefits more when you have high compression. Find Euro pistons, install them, and put high octane in, you will get power. US spec cars do not all have high-compression pistons. Gee wiz indeed.

I observe no difference running 87 or 93 octane in my '83, aside from a slightly rougher idle.

[nynor]

Originally posted by liljon's924S
Are you guys dumb or what? The higher the octane in your car the better performance you get. How do you know this... well if you do some reading on the topic any real Porsche info will tell you that the timing is programed to adjust to the changes in octane. So to answer the guys question in "Simple Octane Question" Yes the higher octane the better performance.

Gee Wiz

this is a good way to get flamed.

the computer will only compensate so far, by advancing the timing. thus, beyond a certain point, more octane is pointless.

definitely stupid.

[livewirevoodoo]

http://auto.howstuffworks.com/question90.htm

http://en.wikipedia.org/wiki/Octane_rating

http://autorepair.about.com/od/generalinfo/a/aa060504a.htm

http://member.rivernet.com.au/btaylor/BMWText/technical/FuelOctane.html

http://theserviceadvisor.com/octane.htm#3

Not that any of these are definitive sources, by any means. But Gee Whiz... I must be dumb. How exactly does higher octane relate to more performance with no change in compression on a stock setup?

[fast924S]

It doesnt, Gee WHIZ, liljon make sure you know what your talking about before you go about with a attitude. You CANT just go and put 93 octane in a car that doesnt call for it and get 50hp from the gas, Talk about dumb, If that was the case people would just be putting in RACING FUEL because it adds power. As many have noted if the car or the mods you have done DONT CALL for high octane then you will see no gain in performance. Infact if your car has no way to adjust ignition timming for different octane then you might be hurting perofrmance, Higher octane fuels burn slower then lower octane fuels. But liljon if you want go get some 110 octane gas if it makes you feel better ;-)

[kcryan]

Originally posted by liljon's924S
Are you guys dumb or what? The higher the octane in your car the better performance you get. How do you know this... well if you do some reading on the topic any real Porsche info will tell you that the timing is programed to adjust to the changes in octane. So to answer the guys question in "Simple Octane Question" Yes the higher octane the better performance.

Gee Wiz

Man for somone who has a whole 24 posts (yes i kno i have nil over here too but on other boards im in the 1000's) you sure talk big, esspescially on a subject your wrong about...

[Tervuren]

What you are missing, is that its not octane alone. Octane affects compression ignition. There are other additives in premium fuels that regular does not have. Its not just about octane rating. People like to see a "highter number", thus, they rate the fuels octane at the pump.

What in the world prompted your post? You out of the blue call anyone disscussing octane an idiot? Huh?

[fast924S]

[liljon's924S]

You guys should read up some more on your DME. That changes the timing and increases the power from better compression...

Why don't you ask a Porsche Tech Huh?

[liljon's924S]

Oh and one more thing it does clean your fuel lines out!

[liljon's924S]

Hey guys remind me what cars we are talking about...OhhhPORSCHES


not my 1980 Ford station wagon

[fast924S]

If you come here and we go and dyno test a stock 944. We will do one test with 87 and another with 94 octane. I bet you will see almost no gain, I say almost because each dyno pull is a little different. If we do see alot more then the factory spec hp for a stock motor then I will give you $50 and a 30pack of whatever beer you want. If im right then I get your pink slip because you shouldnt own a porsche. SO how much do you think you will gain if you put 94 octane in a car that calls for 87??

[liljon's924S]

ALMOST is your words... so it does

[fast924S]

"I say almost because each dyno pull is a little different." PLEASE READ!!

[liljon's924S]

Do You Get Performance Products Parts Mag. fast924S?

[fast924S]

yea why?

[liljon's924S]

Read the fall/winter issue for this year... Go to the powerchip section and Read Pg 27 at the top then write back...

[liljon's924S]

I believe THEY KNOW MORE THAN YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[fast924S]

Ok The chip advances ignition timming Thus the need for higher octane fuel to reduce knock. Its not the fuel thats making the power its the reprogramed chip. Differences in compression ratios and ignition timing make you have to run higher octane fuel so you dont get knock. In no way is that saying that just puting higher octane fuel in a stock 944 is gonna give you more HP.

[livewirevoodoo]

Fast,

I'd like to believe you, but until you add extraneous exclamation points to your posts I'd have to defer to liljons wisdom!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!