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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 08-21-2010, 05:18 AM
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Default Getting more air?

I know I'm gonna do an intake and header-back dual exhaust and programmer. My first question is can I run an intake headers and exhaust without a programmer safely and reliably? The reason I ask is that this will most likely be done in stages, any thoughts on order? I'm sure this is covered almost daily just can't really get the info I'm looking for through the search

Planning on running:
AEM Brute Force/ JBA Shorty headers/ magnaflow hiflow cats 2.5" dual piping with h/x pipe and two Aeroturbine XL2525 resonated mufflers exiting out the back

As far as programmers go I have not really done my homework well enough but I like the BD Triple tuner... Sorry if this is the wrong section for this
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Old 08-21-2010, 10:28 AM
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IMO, I would get a programmer, CAI, 180-tstat and a catch can first. Not necessarily in that order. You'll want the programmer to tune the mods, even slight, for optimium performance.
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Old 08-21-2010, 10:58 AM
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Safely, yes. You just won't see the maximum benefit of your mods until you get the tune dialed in.
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Old 08-22-2010, 01:12 AM
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Thanks, I know I won't realize the most without a programmer. A buddy of mine tried to tell me that if I ran headers without a tune I'd run too lean and damage my engine.
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Old 08-22-2010, 01:19 AM
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You will have no problems but don't run with headers for too long before you get a programmer to richen up air/fuel ratio. These rigs run a bit lean stock anyway.

An A/F of 14.1 at WOT???? What the heck were they thinking anyway...
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Old 08-22-2010, 01:54 AM
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What is the benefit of a lower tstat on a dd? I'm pretty sure I understand how it works but it seems unnecessary on something driven on the street
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Old 08-22-2010, 02:06 AM
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Not really "necessary" but your HEMI will run cooler with the lower TStat. A cooler running engine will make more HP. This won't be a huge HP adder but a cooler running engine is a longer lasting engine, IMHO.
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Old 08-22-2010, 02:25 AM
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I understand it'll make the engine run cooler, I just don't see where it makes more power. Not trying to argue it's just that based on dyno tests I've only seen loss in power with cooler tstats. Though mostly cars, but I've seen as much as 10hp loss
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Old 08-22-2010, 02:30 AM
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You can go too low on a TStat value. Swapping your stock one to a 180 degree unit isn't that much of a change and won't rob you of HP.
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Old 08-22-2010, 04:13 AM
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IMO i would get long tube headers, i mean shorty's are great over stock manifolds and and will make more lowend torque. But the benefits from long tube headers and the sound is amazing. Also american racing headers is now a forum registered vender and can hook you up with great setup. Or you can go with a dynatech setup which may be available for a little cheaper. JBA shorty's are kinda pricy for shorty's anyways, IMO. Just making a suggestion take it for what it is worth because modding is all about getting what "you" want for "your" ride and what you intentions are. Hope this helps.
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