Re: [Amc-list] engine issues small block AMC

[Wrambler242@xxxxxxxxxxx]

I don't know about plugs.
I try and make an informed decision, but hey as far as I know the champions will run it good as anything!
I've read the only thing the high tech plugs do is either extend life due to hard materials or open the spark kernal area.

  You may be as well off finding another set of champions off of evilbay as buying anything new and high tech!

I'm running a 10 year old set of splitfires in the American, their not platinum or anything else.
I have regapped them a few times over the years, but they still work OK.
Probably about time I took them out of service though.

The reason the old champions worked so good from what I've read is they are soft, in relation to other plugs, the surface burns off so they keep working. They also wear out! 

There, hope that helps, should be clear as mud...

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrac II
" I realize that death is inevitable.
I just don't want to be around when it happens! "

 -------------- Original message ----------------------
From: "Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>
> What do you think??
>   I took the plugs out of the white Javelin's 304 yesterday (block has never 
> been out of the car, reground valves at approximately 90k miles, now has 
> approximately 110k) to hose down the cylinders with Sea Foam for winter storage. 
> All plugs (25 year old Champion N12Y) looked very clean, white porcelain, 
> slightly gray white ground electrodes with a thin whitish deposit on them. 
> Virtually no deposit on the little round center electrode. The cylinders must 
> still be sealed pretty well, and the carburetor must be delivering the correct 
> amount of fuel. Last drive of the car was to full operating temperature and at 
> least 20 miles at 2000 rpm in 5th gear. I have been wanting to do a cylinder 
> leak down check to verify for sure what's going on with the engine. Seems to 
> have a lack of high end power and labors trying to rev up to or rev past 4000 or 
> 4500 in most gears.  Is it the crappy 91 octane no lead??
>   Timing is near spec, 5 degress before. Don't know what timing is at 4000 rpm, 
> it's not setup with a readable timing mark to use at higher rpm, which is 
> another thing I've been contemplating doing. Establishing timing marks at the 
> ignition fully advanced points on the vibration dampener to see if the timing is 
> stable and correct. The Mallory dual point doesn't have vacumn advance, just 
> mechanical. I may still be experiencing spark 
> 
>   I'm thinking I have either valve spring weakness issues or that and worn cam 
> lobes, lifters dished troubles. What do you think?
> 
>   Back in the middle 70s when I was braver the car used to top out at nearly 115 
> to 120 mph. Now if I see 90 or 100 I'm lucky.  It should go faster yet because 
> of the .63 overdrive 5th gear.  
>   And Mark don't say something like it's because you've no longer got any balls. 
> ROFL
> 
>   What plug do you guys use to replace the Champion N12Y which is no longer 
> available, iirc.
> 
>   Thanks,
> 
>   Armand
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