5.7L American Racing Headers! - Page 10 - Jeep Garage - Jeep Forum

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  #109  
Old 10-08-2016, 05:42 AM
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Re: 5.7L American Racing Headers!

It's not that complicated. An engine is an air pump, the more air you can ram into it and get out of it just as fast the more potential power you can make. Compared to the stock "log" type manifold on our 5.7L any header will flow way better so power will increase significantly. Tune and intake are just part of that recipe. I'd say 20hp is a realistic expectation.


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  #110  
Old 10-08-2016, 07:11 AM
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Re: 5.7L American Racing Headers!

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Originally Posted by wkjoe79 View Post
I wouldn't say obx is crap just to promote your own product!
I ran an obx stainless downpipe on my previous turbocharged ride for years with no fitment or quality issues. That being said ARH also makes a great product


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Its not my product, we sell it. I am just looking out for the good of others so they don't have to pay twice to get it done. OBX headers are either good or bad, it depends on the production batch. Some can be good and some are way off. Personally, I'm not one to roll the dice. If that's they way you took my comment then I apologize.
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  #111  
Old 10-08-2016, 08:41 AM
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Re: 5.7L American Racing Headers!

All good SMG I just wanted to give in my positive experience with OBX as they are far more affordable than most other brands. 👍🏼


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  #112  
Old 10-08-2016, 09:04 AM
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Re: 5.7L American Racing Headers!

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Originally Posted by wkjoe79 View Post
All good SMG I just wanted to give in my positive experience with OBX as they are far more affordable than most other brands. ����


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Thanks man, didn't mean to come off like that.
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  #113  
Old 10-08-2016, 10:47 AM
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Re: 5.7L American Racing Headers!

20-30 hp with the headers alone. Not including gains from the tune and intake. Tune with intake should add another good 20-30hp
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  #114  
Old 10-08-2016, 11:20 AM
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Re: 5.7L American Racing Headers!

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Originally Posted by EazyE704 View Post
20-30 hp with the headers alone. Not including gains from the tune and intake. Tune with intake should add another good 20-30hp
Where the heck are you guys coming up with these HP numbers for aftermarket headers? You can't assume this number or that number because the stk. exhaust manifold looks restrictive. The stk. exhaust manifold may not be restrictive on a stk. setup. And that would include a Cold Air Induction kit and tuner.

Granted there isn't a lot of information on this stuff most likely due to the vehicle not being noted as a performance vehicle and the majority of owners are not going to modify them. So we have to wait until someone or some manufacturer decides to do back to back testing and then hopefully they share information.

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  #115  
Old 10-08-2016, 02:00 PM
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Re: 5.7L American Racing Headers!

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Originally Posted by Michael Plummer View Post
Where the heck are you guys coming up with these HP numbers for aftermarket headers? You can't assume this number or that number because the stk. exhaust manifold looks restrictive. The stk. exhaust manifold may not be restrictive on a stk. setup. And that would include a Cold Air Induction kit and tuner.

Granted there isn't a lot of information on this stuff most likely due to the vehicle not being noted as a performance vehicle and the majority of owners are not going to modify them. So we have to wait until someone or some manufacturer decides to do back to back testing and then hopefully they share information.

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http://www.powerblocktv.com/episode/HP2010-08/low-buck-hemi#.V_lAB9m9LCQ
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  #116  
Old 10-08-2016, 02:10 PM
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5.7L American Racing Headers!

Engine performance has nothing to do with th vehicle, it's about the power plant. We are discussing the added power the 5.7L Hemi can make not the vehicle it's in. I believe full less restrictive exhaust including headers, intake and CMR tune will net 50hp at the flywheel anything more will require a cam upgrade an so on. Just 20 years of expierience speaking here.


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  #117  
Old 10-08-2016, 02:15 PM
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Re: 5.7L American Racing Headers!

So thats about right, 20-30hp from intake and tune plus 20-30 from headers and exhaust is right on with your 50hp estimate...
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  #118  
Old 10-08-2016, 02:30 PM
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I agree on this here as well. Im up +30 rwhp and +40 rwtq over stock on my 3.7, whih isnt even close to being a performance motor like the 5.7 is. (The 5.7 is a bit of a throw back to the 345 darts and very early hemi)
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  #119  
Old 10-08-2016, 03:14 PM
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Re: 5.7L American Racing Headers!

Quote:
Originally Posted by Sweed View Post
http://www.powerblocktv.com/episode/HP2010-08/low-buck-hemi#.V_lAB9m9LCQ
Sweed,
Did I miss something? That engine had a few upgrades not sure how that helps the debate on how much aftermarket headers add in terms of HP.

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  #120  
Old 10-08-2016, 03:30 PM
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Re: 5.7L American Racing Headers!

Aftermarket headers on there own with no other mods will only yield minimal results due to restrictive intake and tune geared towards emissions. So maybe 10hp or so. When combined with a true cold less restrictive intake and a performance tune the engine breathes easier thus making it more efficient producing the estimated 50hp increase.
Can't get much clearer than that


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