Quote:
Originally Posted by CJD Automotive
Yes, reversion is a big deal on turbo cars! I've been working with Burn's Stainless on the header size/length and shape. They recommended a smooth transition from port to primary with no step or lip.
I believe the long primaries are more key in the reversion scenario, but does go against conventional wisdom for turbo headers. I trust that they know best, it's what they do, and I've seen the data on spool time with short vs. long primaries. Just look at the Mazda turbo road car, high compression turbo car that only works because of a long tube primary manifold.
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This makes total sense. A step into the exhaust tube would slow the gases down at that point. A smooth transition will keep gas speeds up to help with spooling of turbos with long tubes.
Thanks Craig, now I learned something today too.
Keep up the fantastic work. I'll be following