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Custom Dodge Ram Performance Mods - Engine - 4.7 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 4.7-liter V8 engine - 310 horsepower, 330 lb-ft of torque.


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  #1  
Old 01-23-2010, 05:55 PM
jerrman29 jerrman29 is offline
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Default High Performance plugs

I just ordered my cai for my 2008 Ram 4.7, I was wondering about spark plugs. I tried finding e 3 diamond tech. but couldn't find them for my truck. Is there any plugs for my truck that will increase HP? Let me know, Thanks.
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Old 01-23-2010, 06:08 PM
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If you find a plug that can improve HP (with dyno results to back it up) let me know as well. In all the years I drag raced not one plug made a difference. I used AC, NGK and Autolites.
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Old 01-23-2010, 08:44 PM
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I never herd of any spark plugs increasing horsepower either. Are you after that or good performance plugs?
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Old 01-23-2010, 10:37 PM
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I agree . Theres a procedure known as "indexing your plugs" . There is a slight performance advantage but nothing drastic . Maybe a couple horsepower .
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Old 01-24-2010, 06:23 PM
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Agreed. When reading on massive high-horsepower engine builds in Hot Rod magazine and the like, they always just used cheap 80cent plugs. Just throw some Champions in there and you will be fine. I would imagine the plug wires would matter much more.
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Old 01-24-2010, 07:24 PM
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Use the stock NGK's and you'll be fine. Remember that only the plugs under the coil packs require changing at 30K.
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Old 01-25-2010, 10:27 PM
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A guy I work with said he heard the e3 diamond tech was suppose to add 8 HP. I couldn't find n e thing online that said that. I'll just keep the stock plugs. Thanks.
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Old 01-26-2010, 09:34 AM
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So were the old Splitfire plugs. Are those things still around anymore?
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Old 01-27-2010, 11:23 PM
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the difference you see in changing to "performance plugs" will be as noticeable as the power gain on a 40 degree day vs a 45 degree day. Essentially nothing.
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Old 01-28-2010, 03:33 AM
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Put e3's in my 5.9 along with 8mm wires, new cap, rotor. No appreciable difference noted.
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