Xtreme Cylinder Heads on Building 2JZ Heads, Secrets to Porsche Heads and Overbuilding Your Car

In todays episode we sit with Bill From Xtreme Cylinder Heads

Xtreme Cylinder Heads Official Instagram: https://www.instagram.com/xtremecylinderheads

0:00 – Intro 2:57 – Bills Origin Story 6:38 – Starting a Machine Shop From Scratch 7:35 – Building Custom Porsche Castings 10:14 – Biggest Machine Shop Startup Challenges 11:47 – Handling Warranty & Mistakes 13:11 – Hand Porting a Cylinder Head 14:19 – CNC vs Hand Porting 15:36 – Hiring & Training a Machine Shop Team 16:42 – 2JZ Drag Racing History: Nero & Ekanu 23:19 – Uni Seat Technology for 2000+ HP 26:03 – Do You Need a Uni Seat? 27:59 – RB26 Builds: America vs Australia 28:58 – Best Valve Seats for Street Builds 31:05 – Best Valve Spring & Cam Brands 33:31 – Shim Under Bucket vs Shimless 35:33 – Valve Float Explained 38:05 – Billet vs Cast Cylinder Heads 40:36 – RB26 Design Flaws & Improvements 41:15 – What a Flow Bench Really Tells You 43:30 – Why You Should Keep Your Build Simple 44:12 – Air-Cooled Porsche Culture 47:59 – Building Their Own Porsche Casting 53:27 – History of CNC Cylinder Head Porting 54:39 – Rolls-Royce RR350 Alloy Explained 56:08 – Water Passage Design Mistakes 58:09 – Air-Cooled vs Water-Cooled Cost 1:00:18 – Hardest Porsche Heads to Rebuild 1:03:16 – Porsche Head Pricing Breakdown 1:04:29 – Global Client Base 1:06:16 – Why Porsche Stopped Making Heads 1:08:13 – Machine Shop Industry Competition 1:08:59 – Favorite Engine Platforms 1:11:36 – Big Block Chevy Cylinder Heads 1:13:27 – Current Workload & Business Status 1:14:05 – Inside a High-End Machine Shop 1:16:00 – In-House Welding & Repair 1:17:11 – Subaru Cylinder Head Problems 1:19:00 – Full 2JZ Build Cost Breakdown 1:20:32 – How to Choose a Machine Shop 1:23:02 – Red Flags When Picking a Shop 1:26:44 – Why This Shop Skips Deposits 1:29:21 – CFD Porting: The Future 1:31:26 – RB26 Supra Build Update 1:35:21 – 1964 International Scout Build 1:36:08 – Never Been in a MK5 Supra 1:39:55 – Baja 1000 Off-Road Racing Story 1:47:40 – Xtreme Cylinder Heads Contact Info 1:48:45 – Outro

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