The internet is packed with misleading information—and the automotive world is no exception. Thankfully, creators like Jamin Seat from the YouTube channel Freedom Worx are cutting through the noise. He tackles misunderstood topics head-on with engaging, easy-to-digest, and genuinely informative content—served with just the right dose of humour.

👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvip

In this episode of Tuned In, Jamin shares his journey from a kid who loved tinkering to becoming an engineer and respected automotive YouTuber. We also explore how he balances a full-time career in nuclear power with content creation, fueled by his passion for making complex automotive concepts easy to understand.

We dig into the efficiency of diesel engines and discuss some of the biggest myths in the diesel world, including the pros and cons of modern emissions control systems and how they really impact performance.

The conversation also dives into diesel tuning—what sets diesel apart from gasoline, why exhaust gas temperature (EGT) matters, and how it plays a critical role in monitoring engine performance. Of course, we couldn’t resist weighing in on the long-standing debate between Powerstroke, Cummins, and Duramax.

If you haven’t checked out Jamin’s YouTube channel yet, do yourself a favour and head over there. Fair warning: you might lose track of time—but at least you’ll come away knowing a whole lot more than when you started.

👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvip

Follow Jamin here:

Youtube: FreedomWorx
Instagram: FreedomWorx
Facebook: Jamin Seat

Timestamps:
0:00 Breaking Down Diesel: Myths, Tuning & Truth
3:37 How did you become interested in cars?
10:01 Why was the small block chev so popular for modification?
11:28 What are your formal qualifications?
18:57 What made you want to start a Youtube channel?
26:29 Are you hoping to turn YouTube into a fulltime career?
29:31 What drew you to diesel engines?
30:38 Why do trucks and tractors have diesel engines?
34:24 How do we make an emissions compliant diesel?
37:00 Emission control systems, pros and cons?
52:12 More fuel is more power?
55:07 Why do we monitor a diesel tune with EGT?
1:03:01 Where should we be putting our EGT sensors?
1:06:09 Why do people want to ‘Roll Coal’ on their diesel?
1:11:20 Pros & Cons Powerstroke vs Cummins vs Duromax?
1:14:34 How do you get big power from a Cummins?
1:16:30 What’s your opinion on oil change frequency?
1:21:59 Green house gas emissions US regulations
1:28:59 Final 3 questions

David Mazzei may well have the best-sounding turbocharged rotary on the planet, but how he chased down that elusive F1 V10 sound with this masterpiece of an engine is somewhat unexpected.

Rotary engines are often labelled as temperamental and unreliable, but David Mazzei of Mazzei Formula believes the opposite. In his view, rotaries can be among the most reliable engines when properly understood.

👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvip

In this episode of Tuned In, David shares his journey from a childhood fascination with technology and cars to becoming a rotary engine expert. He discusses the challenges and rewards of owning and daily-driving his first RX-7.

We dive deep into rotary tuning, starting with the fundamentals—air-fuel ratios, exhaust gas temperatures, and the critical relationship between ignition timing and engine reliability. David also shares his views on engine building, apex seals, and porting, and explains why rotaries deserve a far better reputation than they’ve been given.

We explore the evolution of his five-rotor engine, what it took to bring such an ambitious project to life, and the challenges of building something this complex. David breaks down the science behind its unforgettable sound and reveals how his background in music helped him dial in and replicate the pitch of an F1 V10.

David’s passion for the rotary engine is undeniable. He’s a wealth of knowledge, and what he’s achieved with his MF5 Superlite is nothing short of extraordinary. If you have even a passing interest in rotary engines, this is an episode you don’t want to miss.

👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvip

Follow David here:

Instagram: mazzei_formula
Youtube: mazzeiformula
Facebook: David Zachary Mazzei

Timestamps:

0:00 Building The Worlds Best Sounding 5 rotor
4:11 How did you become interested in cars?
17:20 How did daily driving your first RX7 at 17 go?
21:55 Rotary reliability
29:16 How did you learn to tune?
37:24 Can you explain the different rotary engine ports?
40:15 Driveability with modern ECU’s on a bridge port or peripheral port?
46:15 EGT’s on rotary engines
55:15 Air fuel ratios and timing on rotary engines
1:06:05 Can you explain rotary split?
1:12:33 How did the 5 rotor project develop?
1:23:17 Is the turbo charger irrelevant to the sound of the engine?
1:30:30 How do we go about building a 5 rotor?
1:38:23 Billet vs factory cast blocks
1:42:46 What’s your opinion on apex seals?
1:46:25 Should we be running premix in our rotary’s?
1:53:37 How important is injector timing?
1:57:25 Final 3 Questions

Pikes Peak and land speed record racing couldn’t be more different when it comes to motorsport, and that’s exactly why Scott Birdsall from Chuckles Garage is so interesting. From 1,000+ HP diesel hill climb monsters to a 2JZ-powered, land speed record-holding Toyota Hilux, Scott is into everything cool and fast.

👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvip

In this episode of Tuned In, Scott shares his journey from a childhood passion for cars to becoming a successful automotive entrepreneur. He discusses the importance of his hands-on education through auto shop, and the challenges of navigating a career in the automotive industry. Scott reflects on the founding of Chuckles Garage and what it’s become today.

He dives into the wild build story of Old Smokey, a 1949 Ford F1 truck, breaking down the engineering challenges of extreme diesel performance, compound turbo systems, and the brutal demands of the Pikes Peak Hill Climb. After a massive crash at Pikes Peak left the truck beyond repair, we explore Scott’s plans to rebuild the iconic machine—faster and more extreme than ever.

We also cover his venture into land speed record racing at Bonnieville, detailing the unique challenges of tuning for wide-open-throttle for long periods of time and the strategies required to achieve record speeds using the 2JZ Toyota platform.

Scott’s approach to building vehicles is truly unique. His ability to take an unexpected or unconventional platform and turn it into an insanely fast machine for a specific discipline—while doing it all with his own unmistakable style is simply impressive.

👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvip

Follow Scott here:

Instagram: ChucklesGarage
Facebook: ChucklesGarage
Youtube: ChucklesGarageOfficial

Timestamps:

0:00 1000+HP Diesels to 2JZ Weapons — Chuckles Garage Does It All
3:53 Where did the passion for cars come from?
6:08 What was the first cool car you owned and started modifying?
8:40 What do you learn at an Auto Shop?
10:58 What was your formal education after High School?
18:24 What was your plan to build your passion into a business?
22:40 How did you build your fabrication skills?
27:18 How much of a game changer is a 3D printer?
30:23 Overview on your business today
38:31 How important are Sema level builds for your reputation?
40:00 Tell us about Old Smokey 1949 F1 Ford
44:29 How to make 1400Hp out of a Cummins diesel?
50:20 Are you doing the diesel tuning?
52:14 Why are you using a compound turbo setup?
59:49 How much can you rev these diesel engines?
1:02:10 What are the challenges of racing old smokey at pikes peak?
1:05:06 Tell us about your crash in old smokey
1:14:27 What’s the plan with old smokey from here?
1:18:06 How did you get involved with a land speed record attempt?
1:21:22 2jz Dart block, what are the advantages?
1:22:52 Was there any other engine options for the land speed truck?
1:24:46 How long are you at wide open throttle at Boniville?
1:26:39 Where do you see the advantages of methanol?
1:30:36 How did you figure out how to break the land speed record?
1:35:36 What’s it like to drive at 250mph?
1:42:08 Final 3 questions