The 5.0L Mustang; The 4.6L Mustang; Differences Between A 5.0L Build And A 4.6L Build - Factory Five Racing Mk4 Roadster Assembly Manual

This chapter deals with the Mustang parts needed in addition to our kit. Many people choose to use
parts from a single Mustang donor. If you are not going to use a donor car but choose to acquire parts
separately, this section may still be useful. The complete list of parts required to build the FFR Roadster
is included in the Appendix of this manual. For specifications on the different year cars, check out the
"Mustang Specifications" Appendix.

The 5.0L Mustang

In 1987, the 5.0L Mustang started a modern muscle-car revolution. For slightly more than $10,000 the
average Joe could pick up a brand new 225 hp car that weighed in just over 3000 lbs. (in LX trim).
Since its introduction, virtually every enthusiast magazine has hailed the 5.0L Mustang as the best speed
bargain of the decade. It had performance numbers of six seconds 0-60 and a quarter mile time in the
14's right off the showroom floor. This factory hot rod came with stainless tubular headers, a five speed
transmission, a big 8.8 inch ring and pinion, limited slip rear end, 11" front disc brakes and much more...
all standard! The 5.0L Mustang literally created a multi-billion dollar aftermarket in less than five years
because of the great bang for the buck that Ford was providing. From racetracks and drag strips all
across the country to street racers in every town, the 5.0L Mustang has earned a faithful following for
its high performance, reliability, and affordability. Many who have owned or driven 5.0L Mustang's
feel that the car is the rightful heir to the legacy of the original high performance 289 Mustangs of the
60's.
We saw the Mustang as more than just the functionally perfect donor car. It is truly the spiritual
successor to the factory muscle Fords of the 60's. The 289 block that beat Ferrari in 1965 still beats
strong in each donor built Factory Five Roadster. The lightweight small block with Electronic fuel
injection is one of the keys to our well-balanced replica. Our design bridges the gap between yesterday
and today. Our kit delivers the precise handling of a racecar along with the mechanical reliability of a
modern Mustang without compromising vintage period authentic looks.

The 4.6L Mustang

In 1996, the Mustang 5.0L engine was replaced with a 281 or 4.6L engine. There have been two
different revisions to the Mustang between 1996 and 2004. The SN 95 Generation 1 (1996-1998) and
Generation 2 (1999-2004). There are a few differences between the two different generations. See the
Appendix for a detailed explanation of all of the differences.

Differences between a 5.0L build and a 4.6L build

There are a few differences we have found between building a kit with a 5.0L donor and using a 4.6L
donor, each has their strengths and weaknesses:
 The 5.0L build is a manual brake car where the 4.6L build is usually done with power brakes and can
also get fitted with the donor ABS brakes if desired.
 The 4.6L, especially the 4 valve (Mach 1 and Cobra™) engines, have more horsepower to begin
with.
 The 4.6L engine is a higher revving (7000rpm vs. 6250rpm) and smoother feeling engine.
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