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Old 10-11-2013, 03:52 PM
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Originally Posted by 64nailhead View Post
It would be great if someone, manufacturer, vendor, etc. could get a list of all of the short plugs out there. And then also include the heat ranges.

I've been searching for a set of 'cold' short plugs for almost 3 weeks, with no avail (when I say cold I mean colder than what I'm running.) My search method is heading off to Advance Auto and measuring plugs tha they might have in stock, but I'm sure you can imagine the issues I'm having asking the counter person.

Another crapper to this is that many of manufacturers don't list if their plugs are short or not. I say this based on my experience with NGK's that I'm trying to replace presently. I'm running NGK 5858 (XR4) and they are much shorter than the stock AC Delco and they are not considered shorty plugs by NGK????? But I'm sure that I can't get the wires on the AC Delco's and I can on the NGK, that aren't considered shorty's, with alot of room to spare.
Back in the illuminated ages before emissions and gas mileage goals this information was widely available. Now it's much harder to come by thanks to our great uncle in DC. I think the manufacturers are afraid of being sued if you use your own ideas for plug selections then vehicles start failing emission tests or worse it's a "prima facie" violation of emission law to use a plug other than that recommended by the OEM because that's part of how the engine was certified.


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Old 10-11-2013, 04:13 PM
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This information is published but hard to get. Parts stores should have catalogs that include sizing specs from each plug manufacturer. This doesn't necessarily mean the counter guy knows how to reference said catalog... i used to be a counterman, I much preferred the real books to look up parts. Often times they are faster and every time they are more accurate.


ac delco (scroll down to page 53)



Champion almost has too much info out there...
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