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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 07-11-2013, 12:50 PM
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Default Dynatech supermaxx headers

Have a question about the dynatech lt's and y with the high flow cats for any of you that are running them. I have the gen 3 05 ram ac 4x4 with. My first mod was a flow master 40 series cat back duel out same side. I will keep that and use with the dynatech's. I just did the jet 180 tstat and flex a lite e fan kit along with a diablo sport tuner with a custom hemifever tune. Getting ready to do a torque converter and headers. My concern is cel with the dynatech kit. I have to pass obd2 emission test here and was wondering if anyone who uses the header kit has had trouble with codes. Any feedback will be appreciated.
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Old 07-11-2013, 01:11 PM
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QC( quad cab ) not ac. Stupid keypad
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Old 07-11-2013, 04:48 PM
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You may want a new tune to go with the LT's. If thats the case just have Hemifever or whoever tunes it turn off the rear O2s. Thats what I had my shop do for me when they installed my LT's and exhaust and did my dyno tune.
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Old 07-11-2013, 09:19 PM
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Thanks for the reply. I will have to get my tune modified so Sean can cut the rear sensors off if I need to. Would just be nice if I didn't need to. I am doing the headers and torque converter so I will wait and install them at the same time. Gonna go ahead and order my nitrous kit too so I can do one final tune and be done with it for a while.
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Old 07-11-2013, 10:23 PM
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I just realized what I told you is only partly true I have no cats so I had to have my O2's tuned out. You might be alright since you're putting in the high flow cats. But there is still a chance that the O2's might turn on a CEL with the HF cats. But you wont know till you try, every truck is going to respond different.

There is also the option on the non fouler trick if you wanted to try that too.
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Old 07-12-2013, 10:21 AM
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some have had luck doin plug foulers..here is how it's setup... I eventually just had my tuner turn the sensors off..



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Old 07-12-2013, 10:30 AM
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^^^ 4 years code free and still able to keep the o2 sensors in a readiness state for emissions.
Do have to keep packing new steel wool every couple of years but it does the job. One thing with these trucks is that they are finnicky. what may work on one may not work on 10 others and vice versa.
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Old 07-12-2013, 11:29 PM
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Good info, thanks guys.
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