hey, fellas',are all small blocks intenally balanced? i forgot>also what year did ford stop using split-rim 16"wheels.

 

Hp books "How to rebuild Small-Block Ford engines" by Tom Monroe states: One method used to achieve such a light compact engine was to limit the size of the crankshaft counterweights inside the crankcase. Consequently, additional counterweighting had to be provided outside the the crankcaseto balance the engine. Counterweights were added to the crankshaft damper,or harmonic balancer and to the flywheel or flexplate. This makes all small-block Fords externally balanced.
221,260,289,302,255,351W- small block family
I do know that the balance of the 302 changed significantly in 1981. As far as flywheel-flexplates, the 302 and 351 use a 28oz counterweight before 81. After 81, the 302 went to a 50oz counterweight, but the 351W continued with the 28oz weighting. Also there are relatively few interchangable parts between the 302 and 351W.

 

thanks bbt,igeuss i knew about the 302 change in '81.my freind had a '82 gt that shook badly after we put in a built 68' 289.thanks for the info, oleblue=

 

Hey for the wheel issue, Ford in 1978 started using the regular wheel, but some still came out with the split wheel, in 1979 they were all regular no more split wheel

Dave

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thanks dave.

 

My 1972 F-250 has one piece 16.5 rims

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72 F-250

 

 

The 16.5 wheels are the same since 1967 and were not split. They are one piece. The wheels we were speaking of were the 16 inch only.

Dave

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