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Swapped to E85 new which Plugs would you use

jayroca

jayroca

Banned
On E85 now and want to know which plugs would you use autolite 103's or 104's thanks!

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I am running 104s and seem to be working well. E85 should allow a bit hotter spark due to it's KR fighting abilities.

Welcome to E85 man!!!!
 
Basically, I would perssonally start out with the hotter plugs. If I saw a little bit of knock I would try and have it tuned out. If that doesn't work, then try the cooler plugs.

So 104's being 2 ranges colder, might be fine. If you pulley down and start seeing a tiny bit of knock you can't tune out, you may want to try the 103's
 
97AutoXVette said:
I am running 104s and seem to be working well. E85 should allow a bit hotter spark due to it's KR fighting abilities.

Welcome to E85 man!!!!
Click to expand...

Thanks man i love it!

GMR Badass said:
Run 103's, 104's, or TR6.......all will work with your application

Pretty sure my old was was running 103's
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I'll try your old setup 103's being as what i seen what it do to some guys and give them butt hurt feelings lol

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tomtom123 said:
Basically, I would perssonally start out with the hotter plugs. If I saw a little bit of knock I would try and have it tuned out. If that doesn't work, then try the cooler plugs.

So 104's being 2 ranges colder, might be fine. If you pulley down and start seeing a tiny bit of knock you can't tune out, you may want to try the 103's
Click to expand...

With running higher boost levels with E85 along with more timing than a typical pump gas setup I tend to run cooler plugs just in case. Hotter or cooler plugs is only the rate at which the plug and dissipate heat......has nothing to do with how hot or strong the spark itself is.
 
I see. I was always told you want the hottest spark plug you can safely run to achieve the most even burn and nost efficient burn.

But the info I've been told about was for 93 octane which is what I run. Since I'm not E85'd I'm not well informed about E85. That said, I'm probably going to avoid posting in E85 posts as much =P
 
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