Welcome to Music City Rod Shop, your source for automotive performance and racing tech info and installation instructions. From increasing performance in street or race cars to handy automotive formulas and installation instructions, we have collected information from manufacturers including MSD Ignition, Taylor/Vertex, Mr.Gasket, Moroso Performance, Competition Engineering, Holley Performance, Comp Cams, Design Engineering, Manley Performance, Hooker Headers, Earls Performance, Wiseco Piston, Hilborn Fuel Injection, and many more.

MSD RPM Activated Switches

This section covers the MSD RPM Activated Switch, PN 8950, and the Window Switch, PN 8956. The PN 8950 will activate a circuit at a desired rpm by supplying or removing ground. The PN 8956 Window Switch will activate a circuit by supplying ground, then will deactivate the same circuit at a different rpm. The MSD Switches are capable of switching approximately 2 amps continuously. If too much current or the circuit heats up over time, the Switches will shut off to prevent damage. For circuits... (more)

Last Edited Nov 8th, 2007 11:26 pm

Zex Installation Instructions for 2005-07 Mustang GT Nitrous System 82034

Installation instructions for the ZEX™ 82034 2005-07 Mustang GT Nitrous System including wiring diagrams, plumbing diagrams, bottle mounting tips and jet/hp chart.... (more)

Last Edited Nov 21st, 2007 01:00 pm

5 Ways To Break The Nose Of A Crankshaft

In recent months we have had numerous questions and issues raised about the nose of the crank and what can cause it to break. What we have found is that in most cases the crankshaft gets the blame for such failures. But in fact, it is the parts that are being used in conjunction with the crank, it is the additional machining done to the parts that are being used with the crank, it is 99% of the time NOT the crank that caused the crank to break. 1. IMPROPER MACHINED CRANK GEARS A . C h a... (more)

Last Edited Mar 13th, 2010 06:57 am

Super T-10 Transmission Dimensions

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Last Edited Nov 5th, 2007 08:29 pm

Saving Nashville Fairgrounds Speedway

There's a fight going on right now in Davidson County, Tenn., that could provide a monumental turnaround in the decades-long displacement of American auto racing's most endangered species: short tracks. Godspeed, Sterling Marlin and Darrell Waltrip, in the effort to save storied Nashville Fairgrounds Speedway -- the short track of all short tracks -- from being plowed under by developers. Marlin, Waltrip and their investors have an alternative urban revitalization plan... (more)

Last Edited Jan 15th, 2011 07:28 am

Zex Installation Instructions for Race Diesel Nitrous System 82044

Installation instructions for the ZEX™ 82044 Race Diesel Nitrous System including wiring diagrams, plumbing diagrams, bottle mounting tips and jet/hp chart.... (more)

Last Edited Nov 21st, 2007 01:36 pm

What Happens When I Advance/Retard My Camshaft or Change The Lobe Separation Angle

Should you advance or retard your cam timing? Find out what actually happens to your torque and power curves before you make the change.Going to have a camshaft custom ground? Use this article to make the right choice for lobe separation angle.... (more)

Last Edited Aug 31st, 2014 08:02 am

Power Valve Operation

The power enrichment system supplies additional fuel to the main system during heavy load or full power situations. Holley carburetors utilize a vacuum operated power enrichment system and a selection of power valves is available to "time" this system's operation to your specific needs. Each Holley power valve is stamped with a number to indicate the vacuum opening point. For example, the number "65" indicates that the power valve will open when the engine vacuum drops to 6.5" or below. An... (more)

Last Edited Nov 4th, 2007 01:00 pm