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How Much Power Does Our 1985 GT Make?

Created by Jay Walling
Date Created: 2/24/2022
Last Updated: 2/22/2022

For this article, we see what our 1985 GT makes before and after replacing the worn-out factory carburetor!

Viewing this install and using the information shared is subject to the terms set forth here - View the LMR Install Instructions Disclaimer.

FOLLOW: 79 93 mustang , dyno , tech

For this dyno article we will be checking out this 1985 Mustang GT and show you that carbureted Mustangs are still able to be a reliable performance vehicle. Check out below for more pics, dyno technical data, and of course the dyno results!

How Much Power Does Our 1985 GT Make?  - How Much Power Does Our 1985 GT Make?

Also, check out our 1985 Mustang GT base line dyno to see what the stock numbers on this car were!


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  • How Much Power Does Our 1985 GT Make?  - How Much Power Does Our 1985 GT Make?
  • How Much Power Does Our 1985 GT Make?  - How Much Power Does Our 1985 GT Make?
  • How Much Power Does Our 1985 GT Make?  - How Much Power Does Our 1985 GT Make?
  • How Much Power Does Our 1985 GT Make?  - How Much Power Does Our 1985 GT Make?

Dyno Technical Data

  • 16-inch 5.0 Resto 10-Hole Wheels
  • T5 5-Speed Transmission So Dyno Pull will be made in 4th gear (1:1 ratio)
  • 4.10 Rear-End Gear Ratio
  • Factory One-Piece Driveshaft
  • OEM Air Cleaner
  • Holley 600 CFM Carburator with vacuum secondaries
  • Off-Road X-Pipe
  • Aftermarket Cat-Back Exhaust
  • Stock 5.0L Engine

Dyno Results

How Much Power Does Our 1985 GT Make?  - How Much Power Does Our 1985 GT Make?

Here are the results! The factory horsepower and torque ratings for this 1985 GT were rated at 210 HP and 265 lb/ft of torque. Our initial dyno pull with the OEM carb produced 185 horsepower at 4500 RPM and 249 lb/ft of torque at 3500 RPM. After swapping over to the new Holley carb, this 5.0L made 192 horsepower at 4500 RPM and 251 lb/ft of torque at 3600 RPM. By no means necessary were we shooting for a night and day difference here. We wanted to highlight that there are still aftermarket options you can basically bolt-on in your driveway without substantial modifications.


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About the Video

We Made More Power On The Dyno With Our 1985 Fox Body GT!

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Published on 2021-09-17
We decided to revisit one of our recent cars on the dyno! This time, we made more power on the dyno with our 1985 Fox Body GT by installing the Holley 600 CFM Carburetor, and it made a huge difference!

Check out the dyno run before we installed the new Holley carburetor!
https://youtu.be/IPIfY8k-teM

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Use of this video is subject to the terms as set forth in our LMR Install Video Disclaimer | https://lmr.com/page/lmr-install-video-disclaimer
Thumbnail image of the author of this article, Jay Walling.

About the Author

Jay has written content for Late Model Restoration for over 10 years, producing over 120 articles. Jay has an extensive 25-plus-year background in automotive and is a certified Ford Technician. Read more...