how do you tell s 302 "boss" engine from normal 302 engine?

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  • Gemma
    Lv 5
    1 decade ago
    Favorite Answer

    The Boss 302 engine is a racing small-block V8 from Ford Motor Company. It was a hybrid of two small-block Ford V8s - It used the block of the small Ford Windsor engine and the heads of the larger Ford Cleveland engine. It was created for the SCCA's Trans-Am road racing series, and was fitted to the Boss 302 Mustang.

    The high nickel content block has a thicker deck, cylinder walls and beefy 4-bolt main caps. It is easily identified by screw in freeze plugs on the side of the block, pent roof valve covers, very wide heads and a very wide intake manifold. The connecting rods are heavy, high strength steel forgings made for high rpm use. The crankshaft is a cross drilled high strength steel forging. The cam and lifters are high lift solid mechanical units.

    The unique, wide, large port Cleveland style 4V heads with poly angle, semi-hemi style valve placement are what give the Boss 302 its unique high power capabilities. Early units were typically characterized by very large intake and exhaust valves sitting in a small quench style combustion chamber. Huge intake ports made certain that the engine only "woke up" above 4000 rpm, while at low RPM the Boss 302 motor ran very sluggishly. At racing speed the engine's performance was quite remarkable.

    The motor has a unique sound as a result of its solid lifter configuration. At idle, properly tuned, the engine has a great deal of 'chatter.'

    Ford will reportedly reintroduce the Boss 302 to production in 2006, to prepare the market for the new Boss/Hurricane V8 which will be introduced in the 2008 F-150. The 302 will not be similar to the original due to wedge heads and very different from the 2008 production model. It will be offered only as a crate motor, not as an original equipment engine in any Ford vehicle. But this motor will be the new heart of the mustang GT in 2008 as it takes over the older 281 4.6 liter engine.

  • Anonymous
    1 decade ago

    there are some visual differences between the boss 302 and regular 302. the boss 302 use the clevland style heads. the easy way is go to this site and check the block id of the engine. http://raceabilene.com/kelly/hotrod/engine.html

  • 1 decade ago

    The quickest way to tell:

    The valve cover has eight bolts as opposed to six on a regular 302.

    If the valve cover is off, the valves on the regular 302 are all in a straight line and all have the same tilt.. On the Boss they are canted the intakes are in one line and the exhaust are in another and they tilt differently.

  • 4 years ago

    Yes , but why ? A 1981 motor is low compression with little horsepower . Any 302/5.0 will bolt in . A 351w or 351c will bolt up to the 302 tranny but the motor mount brackets are different . If you have a 6 cylinder in it now you will need to change the motor mount brackets anyway , and the four lug suspension is weak .

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  • Anonymous
    1 decade ago

    The boss engine will have threaded coolant expansion plugs on the front of the block. Also, if it suspected to be original, pull a valve cover, the engine should feature adjustable rocker arms.

    The block also features 4-bolt caps on caps # 2,3,& 4

    Also, check for a whoopie cushion in the rear pocket.

  • 1 decade ago

    The number one dead giveaway is that it will have 351 Cleveland heads on it. That is not surefire though because you can install cleveland heads on any windsor engine with a street boss manifold. Do some research online and you will find casting numbers and such that would lead you in the right direction.

  • J.R.
    Lv 6
    1 decade ago

    Serial number. Go to a Mustang forum with your serial number from the block and heads, and ask them.

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