Iridium spark plugs

chamcook

New User
Installed Autolite XS85DP iridium Powersports spark plugs replacing Autolite 437 - unbelievable improvement in starting response - had same response with a Toyota van replacing platinum with iridium plugs - amazing.
 
I replaced the standard copper plugs in our antique Corvette with iridium and there was an instant improvement in cold idle over wanting to stall during warm up.
 
(quoted from post at 15:59:37 07/15/20) Installed Autolite XS85DP iridium Powersports spark plugs replacing Autolite 437 - unbelievable improvement in starting response - had same response with a Toyota van replacing platinum with iridium plugs - amazing.
nterested in a bridge? I have some for sale. You just name the Interstate.
 
You could get some HOT! Firestone POLONIUM Plugs
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(quoted from post at 07:02:34 07/17/20) That's a new one on me. Never heard of those.
...and for just a few cents more you can buy them lubricated with Polychlorinated Biphenyls (PCB) and be guaranteed to shorten your times of frustration with your tractor!
 

Just bought a 9N yesterday. Am trying to ensure all fluids, ignition parts, etc. get updated.

I see the responses to your post and am having a hard time determining what is sarcasm and what isn't. Did you really see an improved performance with the iridium plugs or do they not make a difference on an engine as old as a 9N? I don't want to waste money, but want to ensure the best performance on the old machine as possible.
 
(quoted from post at 13:57:58 07/25/20)
Just bought a 9N yesterday. Am trying to ensure all fluids, ignition parts, etc. get updated.

I see the responses to your post and am having a hard time determining what is sarcasm and what isn't. Did you really see an improved performance with the iridium plugs or do they not make a difference on an engine as old as a 9N? I don't want to waste money, but want to ensure the best performance on the old machine as possible.

I made the comment about the improved Ford 8N engine performance with Autolite XS85DP iridium Powersports spark plugs - they work very well.
 

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