Rebuilding a 351 Windsor for Installation in a 1982 Ford Bronco
Installation photos are here!
Dyno test results are here!
The goals of this project are two fold. The current Bronco engine, a Ford 302, has a great many miles on it and is very "tired". The current motor is hard pressed to maintain 55 MPH going uphill. The 302 also leaks oil like a sieve from the rear main seal, and blows oil out of the dipstick tube (partially ejecting the dipstick in the process) under high load. One goal of this project is to replace this tired old 302 with a new engine.
The second project goal is one I like to term the 'Tim Allen Goal' - More Power.
Several steps are being taken during the rebuild of the new motor to accomplish these goals.
First, the new motor is a Ford 351W. This is a larger displacement engine with a higher base horsepower than the 302.
Second, the block will be bored to .030" over the stock cylendar diameter, yielding a total displacement of 357 cubic inches.
Third, custom pistons will be installed yielding a a compression ratio of 9.2 versus the stock ratio of 8.
Fourth, a custom cam will be installed to provide more low-end torque than the stock cam.
Fifth, a performace intake manifold and carburator will be installed. This manifold a carburator combination will be able to deliver 650 Cubic Feet per Minute of air to the engine.
Sixth, a exhaust headers and a custom exhaust will provide for a higher exhaust flow rate, again yielding in more air flow through the engine.
A suitable block has been found and purchased. The 'donor' engine is a 351 Windsor out of a 1978 Ford Torino. The complete engine (long block), minus an alternator was purchased for $150.00 at the D&M Junkyard in Christiansburg, VA.
The donor engine has been disassembled. The block and heads have been delivered to the Baldwin Performance machine shop in Plum Creek, VA
The block and heads have been cleaned and inspected. Both passed with flying colors. The crank, on the other hand, will have to be replaced, since it was over .020" undersized.
The block from the top end
The block from the bottom end
The heads, freshly cleaned
My apologies for the lack of updates. The 351W is now completely built and awaiting installation. The motor features a new crankshaft, Federal Mogol Speed-Pro pistions, an RV cam, and a performance timing set. The cylinders are bored .030" over and the heads have been shaved a few thousandths. This will result in a displacement of 357 Cu. In. and a compression ratio of 9.5 to 1. The intake manifold is a Weiand Stealth Hi-Rise 4 Barrel intake. Due to financial considerations, the Headers will have to go on at a later date. Well, without further ado, here are the pictures.
The Completed 351W Engine:
The new crank shaft:
Federal Mogul Speed-Pro Pistions:
The RV Cam:
Melling performance oil pump:
Valve Rocker arms and Engine Top End:
Rod Cap with Bearing Insert:
Crank Journal and Rod Cap:
Last Update: 01Apr2002