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8-Second Turbo Mustang - NMCA Boost Control

If You Want To Win, Use A Turbo.
By Douglas R. Glad
Photography by Douglas R. Glad
Nmca Racing Speed Street Race Car
This is Tim Meagher's Street Race car. Take away the stickers, and you have a vicious street car executing 60-foot times in the 1.30s on a 275/50-15 BFG drag-radial tire.

Nmca Racing Speed Interior View
The interior is from a '90 Mustang, including the airbag (not hooked up). On the center console is the control panel for the Mallory ignition system (the red box), and the box below it activates the boost control. Data-logging is not allowed in the Street Race class. The bottle contains CO2 that controls the wastegate.

Nmca Racing Speed Engine View
The turbo idea came from the fact that Tim and his cronies have all owned 9-second street cars at one time. All of them turbo. Everyone told Tim a turbo wouldn't work in the NMCA, so they decided to try it. The Dart block is essentially a 347 that is 0.090 over for 357 inches with 218cc Victor Jr. heads and a Trick Flow TFS R intake manifold. The roller cam is class-limited to 0.555 lift at the valve; the duration is a secret. It makes 850 hp at 6,800 and 780 lb-ft at 5,400.

Nmca Racing Speed Trunk View
Casey Upton wired the dual Powermaster batteries. The Mustang uses two batteries run in series through a 16-volt system to keep up with all the electronics. The fuel cell and the intercooler tank are both hand-fabbed and are actually separate and do not share a wall. The electric pump is for pumping ice water to the intercooler.
Nmca Racing Speed Left Side View
Nmca Racing Speed Front View
Tim bought an '81 Mustang shell to build a really fast street car, and that year was considered pre-emissions at the time. He also found a '90 in the junkyard for parts. They took every piece of the car down to bare metal before painting it. The cowl is from Cervini
Nmca Racing Speed Driver View
Early in the season, Tim and the crew blew up a turbo and an engine. Thinking they were out for good, they showed up in Ohio and found out that the NMCA automatically drops two of the races. Back in the game, Tim dominated for the rest of the season.
Nmca Racing Speed Engine View
Job Spetter at Turbo People of New York did the math and prepped the Precision turbo. It measures 72 mm tip-to tip on the impeller wheel per the rules. There is no restriction on the exhaust wheel. The fabrication of the stainless tubes was performed by Chris Thatcher in three days.
Nmca Racing Speed Engine View
Plugged into the back of the HKS 60mm wastegate is a MAP sensor that provides feedback to the AMS 1000 boost controller. A 6-pound spring can produce around 12 pounds of boost with another 1-5 pounds being added by a charge of CO2 through the black tube on the back of the gate for a total of 17 pounds. The boost pressure can be dialed using the controller in the car, depending on the track conditions.

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