compression ratio
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
compression ratio
Originally posted by tejomakash
Not mustard gas. Mustard gas raises huge blisters wherever it touches you - skin, eyes, nasal passages, bronchial tubes, lungs. Nasty stuff.
Nasty, nasty stuff.
Not mustard gas. Mustard gas raises huge blisters wherever it touches you - skin, eyes, nasal passages, bronchial tubes, lungs. Nasty stuff.
Nasty, nasty stuff.
It's chlorine, I know that, I've had a taste of it myself.
ak
Logistics Pro
Joined: Feb 2000
Posts: 3,565
Likes: 9
From: Sun River St. George
compression ratio
Man did we wander off on this one or what! Poor Jeff must be wondering what happened to his question. So here goes! Clean out the combustion chambers using water. Change the points and set the dwell, or install a Pertronix Ignitor and time the engine at 10 degrees initial advance. Go for a test drive and put the engine under load, if it still pings, back off the timing a couple of degrees at a time until it no longer pings under load. Reading the original post I think this problem has developed over time. So it may be related to the points wearing out?
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Senior User
Joined: Jan 2000
Posts: 259
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From: Mount Sunapee, NH
compression ratio
It sounds like cleaning the engine with water works best. I can't remember what the engine is timed at. I don't have points on this engine. It has the duraspark setup out of a 79, and I did the large cap conversion. Not sure if a weak or worn/old dis would be some of the problem? It has a new cap and rotar though, and wires. So with some new parts and a clean combustion chamber should I be able to run 87 octane and not have a pinging problem and still have some power out of this engine?
Jeff
Jeff
Logistics Pro
Joined: Feb 2000
Posts: 3,565
Likes: 9
From: Sun River St. George
compression ratio
Jeff, I sure hope so. That noise you hear will destroy pistons. Pull a couple of spark plugs and look in the combustion chambers, then clean them really good. The dribbling water hose would be easier than my gallon jug method. Get it up to operating temp and rev it up to about 2000 RPM and slowly dribble the water in. Do this for about 10-15 min. You will need to change oil after this (I usually do this once a year during oil change). After you clean the combustion chambers pull a plug and look again. You should be able to clearly see the piston. Let us know how this turns out.
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