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Old 02-10-2016, 10:40 AM   #102 (permalink)
Shawn D.
Harebrained Idea Skeptic
Join Date: Jun 2008
Location: Alpharetta, GA
Posts: 211

The White Car - '84 Mercedes-Benz 300td
90 day: 28.84 mpg (US)

The Blue Car - '86 BMW 535i
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Originally Posted by freebeard View Post
From Permalink #90

Did we decide you'd get better scavenging with a radius between the pipes? Instead of V-notching and circularizing the three pipes, maybe cut them with a V-tab and bend it out to for 1/3 of the transition. The cut the collector with three V-tabs and bend them in to close.
Nope, you decided that. This isn't about blood flow. If a radius like that were better, that configuration would be used in high-$$$$ systems by top race teams, but it isn't. To the contrary, to prevent reversion it's considered preferable to have a sharp step instead of a smooth bend like that at a transition.

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freebeard (02-10-2016)