
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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