Just wanted to double check this guys!, ;) - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
View Poll Results: Spark plug + Gap you guys used and have been happy with on a 3.5L H.O. motor?
0.48" Gap 0 0%
0.49" Gap 0 0%
0.50" Gap 4 66.67%
0.51" gap 1 16.67%
0.52" Gap 0 0%
0.53" Gap 1 16.67%
Voters: 6. You may not vote on this poll

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post #1 of 3 (permalink) Old 11-20-2006, 04:36 PM Thread Starter
Join Date: Jan 2004
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Smile Just wanted to double check this guys!, ;)

I have a 20001 3.5L H.O. engine from an Intrepid, and bought the factory champion plugs, and just wanted to know if my gap(0.53") is ok for this motor, the specs state you can gap - 0.48" to 0.53" -, What are the gains, and loses for this type of gap for this motor?, its getting cold up here in CT, so just wanted the best performance, and gas savings best, wachu guys think about this?, I also have searched here, but came up with soOOoooOOoo many hits, I didnt know where to start, so just wanted ask you pros!, ;)

luisa is offline  
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post #2 of 3 (permalink) Old 11-20-2006, 05:28 PM
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Well first off, these should all be in hundredths of an inch. Second, I have been happy with my 0.050" gap in both winter and summer temperatures and I get about 27-28 mpg on the highway, but asking about plug gap is like asking about oil around here!
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post #3 of 3 (permalink) Old 11-20-2006, 05:43 PM
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With the advancements in ignition systems, I wouldn't think you need to change the gap for winter on these cars. One thing I can tell you is that the wider the gap gets, the lower the rpm's will be when the power starts to drop off. Also, the wider the gap the harder it will be to jump that gap, which leads to more work on the part of the coils and the possibility of causing misfiring. A narrower gap would be easier to jump but there's the greater possibility of any debris fouling out the gap when its smaller. Another thing with the smaller gap is heat. since there will be less loss across the terminals, the terminals might end up getting hotter, which could lead to pre-ignition.

I had an aftermarket ignition kit on my old truck where they advised to increase the gap a minimum of .010" over factory and work up from there. I did until I started to notice the power band shifting downward and worked back down from there until I found its nice spot, which turned out to be close to .015" over factory, so I have played around with this stuff a little bit.
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