Field Report: Why Not Fit The BIGGEST Exhaust Manifold You Can?
About this episode
Exploring the common belief that bigger exhaust manifolds lead to better performance, Ben from R-Tech discusses the nuances of manifold design for turbocharged vehicles. The conversation highlights how optimizing runner sizes based on application and engine specifications can enhance drivability rather than just peak power. Key considerations include flow matching between exhaust ports and runners, the impact of manifold volume on turbo lag, and the advantages of casting over fabrication. Ben also touches on wastegate integration and the importance of proper installation for reliability.
Traditionally, a bigger manifold has been considered the holy grail of performance because the bigger something is, the more air you can hammer on through, right? But, is this actually true and why do companies like ARTEC Performance do things differently?
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Exhaust flow vs exhaust port sizing, turbo inlet, outlet and cylinder capacity and more are all touched on in this interview along with casting vs custom fabrication, materials and a commonly overlooked consideration with aftermarket turbo setups, turbo bracing.
Big thanks to Ben Creswick for sharing his time at GTR Fest and we hope testing with the Inconel manifold applications goes well.
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