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Exhaust


hntr45

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So I have a custom exhaust on my truck with 2.25" pipe from the manifold back. Rather than the exhaust shop putting in some kind of taper pipe, they simply put a 2" pipe with a 2.25" pipe and welded up the gap right before the flange. Would it benefit me at all to have that tapered instead? I also had the thought of shorty headers that went from the head bore size to 2.25" outlet. Any advice is greatly appreciated
 


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ericbphoto

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I'm not an exhaust expert, but I'll give an opinion anyway.

Since the transition is Increasing pipe size, I would think the welded transition is fine as long as the weld sealed it properly. The size difference is very small. The ID of the 2.25" pipe is around 2.10 - 2.15", which is barely bigger than the 2.0" pipe. Even if the pipes are not perfectly centered, there is very little gap to fill. Furthermore, I can't see where a tapered transition would do much to improve exhaust flow as compared to the welded transition. Due to the pipe size increase, you are reducing exhaust gas velocity.
 

alwaysFlOoReD

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I watched a video awhile back that some magazine did about header sizing and if dimpling the tubes ( like for steering issues) would affect horsepower. At the end ALL the tubes were crushed in half and the horsepower dropped by about 5%. I don't think the transition you have will be bettered by a taper.

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>>>>>

Agree with the 2 above posts.

My 02: Headers would be the best addition to your current exhaust, and from what I've read, there ain't many, if any companies that build them for our trucks:icon_confused:, so CUSTOM or HAND-MADE is bout the only option.:icon_welder:

Keep us informed on what ya do and take pics!:icon_thumby:
 


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