Thread: Help please
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Old 11-27-2018, 06:32 PM   #13
MALAK
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Join Date: Jun 2010
Location: Highland, CA
Posts: 177
Default Re: Help please

Quote:
Originally Posted by Bob C View Post
The head gaskets don't usually fail between 2 & 3, there's a lot of meat there.
True that.

Quote:
Originally Posted by Synchro909 View Post
There was discussion in a thread here a while ago as to whether it is even possible for a backfire to happen through the carby. Some argued that a BACK fire would only be the explosion of unburnt gasses in the exhaust (ie, out of the back of the engine) and that a "cough" through the carby would be a FORWARD fire. I thought it an acedemic difference but it would at least be more accurate and avoid misunderstandings.
This post reminded me of it.
Quote:
Originally Posted by V4F View Post
back fires occasionally thru carb
Interesting.
If we consider the fuel/air mix entering the cylinder as Forward flow wouldn't a reversal of that flow be considered a Back fire and an explosion in the exhaust, which flows the same direction as the exhaust, be considered a Forward fire? Or, in this discussion, were they looking at it from a perspective view? That is the intake (carb) is ahead of the exhaust and therefore Forward?
Personally, to avoid misunderstandings, when discussing these sorts of things I think the term backfire is appropriate but should be delineated as the OP said "back fires occasionally thru carb". No ambiguity there. At least in my mind.
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