Pennzoil Presents Dyno Wednesday: Budget Boosted LM7 Swapped ’78 GMC Throws Down 550 WHP

By Justin Fivella - July 10, 2013

Here’s something you don’t see everyday, someone crazy enough to dyno their jacked-up truck with 40″ tires! But the catch, even with the big ol’ 40s, this ’78 GMC can smoke plenty of fast cars, bolt-on Camaros, stock Corvettes and of course, plenty of Mustangs. How, you ask? Why, with a boosted LM7 with a 68mm turbo that’s pushing 550 WHP and 540 LB-FT through the 40″ tires that are robbing at least 50 WHP!

Watch it throw down some big numbers:

Here’s it tearing up the sand dunes:

About Pennzoil®

At Pennzoil®, we know it doesn’t matter what you do in your car, it only matters what you put in it. That’s why our synthetics have been the driving force behind clean engine technology and unsurpassed engine protection.* We formulate our state-of-the-art motor oils to keep engines running stronger and longer so you can protect your car and the memories made in it.

Pennzoil® is the most trusted motor oil brand in America.** Each Pennzoil motor oil is formulated with special Active Cleansing Agents™ that not only help prevent sludge, but also clean out existing sludge. The full line of Pennzoil quality products includes Pennzoil Ultra™ motor oil with Hyper Cleansing Technology™, Pennzoil Platinum® Full Synthetic motor oil, Pennzoil® motor oil, Pennzoil Gold™ motor oil, Pennzoil® High Mileage Vehicle® motor oil, and Pennzoil Marine® engine oil. For more information about Pennzoil products, please visit www.pennzoil.com. *

* Based on Sequence IVA wear and VG sludge tests sing SAE 5W-30.

** Based on a survey of licensed drivers conducted by a leading research firm January 2005 – December 2011.

Tags: LM7 swap, Swap, Turbo, turbo lm7

Pennzoil Presents Dyno Wednesday: Budget Boosted LM7 Swapped ’78 GMC Throws Down 550 WHP

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