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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