Mary Lou: Nearly Road-Ready!

The engine replacement is wrapping up, along with other modifications.

Jan 11 • Mark-A-Billy

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2

December 2025

OM642 EGR Deletion

Substack and Qortal Exclusive Content!

Dec 29, 2025 • Mark-A-Billy

9:25

Mary Lou's "New" Engine

Sharing the process of replacing a Mercedes OM642 3.0 V-6 turbodiesel in a W164 chassis

Dec 9, 2025 • Mark-A-Billy

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12:45

October 2025

S&S Injector Work & Mary Lou Troubleshooting

I run into an injector problem and really enjoy working and visiting with S&S Diesel Motorsport in Indiana

Oct 19, 2025 • Mark-A-Billy

2

5

25:47

July 2025

Maximum Flow! Evonne gets an upgraded downpipe and intercooler tubing.

We're now ready for some tuning in our quest for 400 hp!

Jul 6, 2025 • Mark-A-Billy

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6

16:58

More Fuel: Upgraded high pressure pump on an OM648 Turbodiesel

We add a pump from an OM628 to support the oversized injectors

Jul 3, 2025 • Mark-A-Billy

2

10

1

15:54

June 2025

Oversized Injector Installation on Evonne the Turbodiesel

Really: the injector replacement process on any OM648 engine

Jun 20, 2025 • Mark-A-Billy

4

9:31

May 2025

400 hp! The parts have arrived!

I review the parts that will be going into Evonne the Turbodiesel.

May 30, 2025 • Mark-A-Billy

1

12

11:29

Solved! Energy Drain & USB Power Relocation

My battery is thanking me!

May 24, 2025 • Mark-A-Billy

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2

11:27

Parasite! Energy Drain Troubleshooting Procedure

Hunting down a nagging, persistent issue

May 3, 2025 • Mark-A-Billy

3

15:13

April 2025

Transmission Controller Genius! An Interview with Rand Ash

Creator of the custom, open-source Ultimate NAG52

Apr 12, 2025 • Mark-A-Billy

2

5

41:25

Stage 2 Performance Runs

Making some 1/4 mile runs in Evonne to measure performance

Apr 10, 2025 • Mark-A-Billy

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4

3:18