Quote:
Originally Posted by sperry
I'm not sure how much heat soak a coated DP would stop... and if "maintaining gas velocity" were an issue in a DP, it'd be the same ~2" diameter that the UP is. Just seems like an awful expensive upgrade to a pipe for a pretty minimal gain.
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No, it wouldn't.
DP's are large in diameter in order to allow a specific type of turbulence in a "collector" area as this actually spawns a cyclone effect that helps keep the velocity up. Unfortunately the WG gasses don't benefit from the turbulence and by bypassing that turbuland area of the DP, a DWG will increase the WG's efficiency.
And it does help with heat soak. Many bare DP people have wrapped their DP purely due to TMIC heat soak and engine bay heat.