Willard made 530 horsepower on the 60-64 last time and we thought the turbo was too small. So we put the biggest drop-in that we make on it, the Aggressor 67-9, and went to find out.
Before we hit the dyno we hooked up about 21,000 pounds and actually towed with it. And look, it tows. It is fine. But fine and good are two different things, and the 67-9 has a pretty clear opinion about where it wants to live in the rpm range. Below 2,000 you feel the size. Above it, it is a different story.
We strapped it down after the tow test, made some pulls, and overlaid it against the 60-64 run so you can see exactly what changed and where. The power band difference is obvious on the graph and you can feel it in the truck.
The point of this whole test is not to crown a winner. It is to show you that turbo selection actually matters and the right answer depends on what you are doing with the truck. If you tow heavy every week that answer looks different than if you want a fun street truck that can pull a trailer when you need to.
If you want to see where this build goes next, subscribe. We are not done with Willard.
If this video got you thinking about your turbo setup, everything we run and everything we sell is over at PowerDriven.com. Go check it out.
Shop Power Driven Diesel: https://www.powerdriven.com
0:00 Intro
0:18 About Willard
0:37 Why the 67-9
1:13 6064 vs 67-9 side by side
2:06 Install
2:18 Tow test
3:52 Turbo tech talk
4:54 On ramp pull
7:54 Second tow run
9:39 Tow test recap
10:42 Dyno pull
12:06 Dyno overlay vs 6064
13:17 Next steps
14:17 Tow tune pull
16:08 What is next for Willard
17:04 Final thoughts on the 67-9
18:19 Boot failure at 50 psi
20:18 Outro
Power Driven Diesel is a specialty performance shop engaged in the engineering and development of high-performance turbo diesel technologies.
Contact Us:
435-962-9555
info@powerdrivendiesel.com
https://powerdriven.com
https://www.facebook.com/powerdrivendiesel/
https://www.instagram.com/powerdrivendiesel