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  #1 (permalink)  
Old 10-20-2004, 10:54 PM
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Lean or Rich???

Is this a lean failure, or a rich failure???? I'm having a debate with a friend on it.. lol...

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Old 10-20-2004, 10:57 PM
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Lean conditions are usually what cause damage as the lean amount of fuel builds up quite a bit of heat.
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Old 10-20-2004, 11:15 PM
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Looks like detonation to me. Lean may or may not play a big part, but timing, too much compression and cheap gas will.
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Old 10-20-2004, 11:57 PM
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i usually run the cheap gas but today i felt like getting the 93 octane. the burning gas smells different i noticed, like its burning up the crap in my motor cleaning it out. the old motor in my car had burnt pistons like that and it ran like poop
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Old 10-21-2004, 07:45 AM
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Quote:
Originally posted by Brian Morency
i usually run the cheap gas but today i felt like getting the 93 octane. the burning gas smells different i noticed, like its burning up the crap in my motor cleaning it out. the old motor in my car had burnt pistons like that and it ran like poop
If your car was burning pistons it wouldn't have been driving it for long. The only reason higher octane gas is ever needed is if your car is detonating (and again, if it was, you'd probalby be rebuilding it by now). What is your compression ratio? Burning more octane than you need is a waste of money and gains you 0 horsepower.

K
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Old 10-21-2004, 10:21 AM
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Indeed. I love the low compression street car guys who "swear" by airplane fuel .
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Old 10-21-2004, 10:26 AM
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airplane fuel!! this sounds like a good one.dude tell us the story! open a new thread if you have to.

do it, do it , do it
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Old 10-21-2004, 11:46 AM
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Lean for sure. Rich does no damage since it makes the combustion temps and pressure go down.

Chris
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Old 10-21-2004, 11:55 AM
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can richening up your jets on your carb (assuming your setup can accept the extra fuel without foul) slightly reduce your chances of spark-knock and detonation?

K
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Old 10-21-2004, 12:29 PM
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I believe it is lean as well, but a friend of mine seems to thing the ring butted together, and did that.... I think it just got hot and melted.... lol...
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Old 10-21-2004, 01:39 PM
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Quote:
Indeed. I love the low compression street car guys who "swear" by airplane fuel .

Yon can run AV Gas in a engine.There is a certain ratio to it.I am not for sure whay it is.I work on tractors/trailers.Used to work for a tanker co.,there were three guys who raced big block cars there.They would always grab some AV Gas after they dropped the load and mix it to run in their cars.If you mix it wrong you will break things.I used it in my kerosene heater for a few years,until I ran out of my stash.It is cleaner,hotter and lasts longer than kerosene.I never put it in my tank though.
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Old 10-21-2004, 01:52 PM
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I think he's saying that its rediculous to listen to some guy running 8.5:1 compression talking about how great AV gas is.

Too many story-tellers in this hobby.

K
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Old 10-21-2004, 02:23 PM
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I dig.
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Old 10-21-2004, 02:27 PM
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Quote:
Originally posted by killerformula
I think he's saying that its rediculous to listen to some guy running 8.5:1 compression talking about how great AV gas is.

Too many story-tellers in this hobby.

K
Funny, I always thought AV gas would make your car fly.
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Old 10-21-2004, 02:43 PM
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yeah its pretty good stuff, its no 300 octane though!

lolol
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