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Custom Dodge Ram Performance Mods - Engine - 3.7 Liter V6 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 3.7-liter V6 engine - 210 horsepower, 235 lb-ft of torque.


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  #21  
Old 10-30-2011, 03:42 AM
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Originally Posted by snrusnak View Post
Myth. If you lose torque with headers on one engine, you'd lose torque with headers on any engine. You gain overall torque with headers.
Not necessarily. Each engine reacts differently depending on the way it's cammed and tuned. Just like if you go with too big of an exhaust on a newer hemi you'll lose some low and mid-range. You gain overall power, especially higher up with headers. A stock 3.7 just doesn't need them. There's a guy I know with a 3.7 in a Jeep that just swapped back to the stock manifolds because the JBA's leaked constantly and he said it felt like it fell flat on it's face. Now if the cams have been upgraded, compression, tuning, etc, then headers on a 3.7 may be worth it.
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  #22  
Old 11-06-2011, 10:20 PM
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Originally Posted by HemiLonestar View Post
There's a guy I know with a 3.7 in a Jeep that just swapped back to the stock manifolds because the JBA's leaked constantly and he said it felt like it fell flat on it's face. Now if the cams have been upgraded, compression, tuning, etc, then headers on a 3.7 may be worth it.
Interesting, did your friend use mopar or jba gaskets when he put them on? I haven't had any issues w/ mine leaking and I used the gaskets they sent w/ them. Did he have other mods to compliment the headers? I think a good tune is a must w/ them in order to see their potential.
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  #23  
Old 11-06-2011, 10:43 PM
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Interesting, did your friend use mopar or jba gaskets when he put them on? I haven't had any issues w/ mine leaking and I used the gaskets they sent w/ them. Did he have other mods to compliment the headers? I think a good tune is a must w/ them in order to see their potential.
You'll be fine man, the "less back pressure makes you lose low end" thing is not true, it's a misconception. The reason people sometimes lose low end from an exhaust change is that they go with a larger diameter exhaust. A larger diameter pipe slows exhaust gas velocity and this hurts low end power. If you have a proper sized exhaust you won't lose low end, even with headers and a free flowing muffler. Less back pressure is ALWAYS better; people just seem to think it's the back pressure that effects low end, but it's actually the exhaust gas velocity. If you have the stock exhaust tubing for most of the exhaust you won't lose any torque with the headers.
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  #24  
Old 11-06-2011, 10:56 PM
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Originally Posted by snrusnak View Post
You'll be fine man, the "less back pressure makes you lose low end" thing is not true, it's a misconception. The reason people sometimes lose low end from an exhaust change is that they go with a larger diameter exhaust. A larger diameter pipe slows exhaust gas velocity and this hurts low end power. If you have a proper sized exhaust you won't lose low end, even with headers and a free flowing muffler. Less back pressure is ALWAYS better; people just seem to think it's the back pressure that effects low end, but it's actually the exhaust gas velocity. If you have the stock exhaust tubing for most of the exhaust you won't lose any torque with the headers.
Oh I know, I was just interested in the issues his friend experienced.
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  #25  
Old 11-06-2011, 11:03 PM
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Gotcha. How thick is the flange on the headers where it bolts to the heads? That is usually what makes them leak is when the cheaper manufacturers use thinner flanges and they end up warping from the heat. The exhaust port in the head is the hottest part on the whole engine, the header right at the flange is basically the same temp...
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  #26  
Old 11-07-2011, 01:12 PM
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Gotcha. How thick is the flange on the headers where it bolts to the heads? That is usually what makes them leak is when the cheaper manufacturers use thinner flanges and they end up warping from the heat. The exhaust port in the head is the hottest part on the whole engine, the header right at the flange is basically the same temp...
It's pretty thick, I think close to as thick as the oem manifolds.
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  #27  
Old 11-07-2011, 02:41 PM
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Ok. Some cheapo companies use 3/16" that's not good at all. Most use 1/4" which is ok, but 3/8" is much better, I've even seen 1/2" as well.
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  #28  
Old 11-07-2011, 08:46 PM
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Originally Posted by snrusnak View Post
Ok. Some cheapo companies use 3/16" that's not good at all. Most use 1/4" which is ok, but 3/8" is much better, I've even seen 1/2" as well.
JBA's site says 3/8, I'm too lazy to go out and measure to confirm it.
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  #29  
Old 11-07-2011, 08:57 PM
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Cool sounds like a good deal you got on a good product!
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