hey
im putting a 69 351w in my 85 f150 4x4

the factory spec.s say:
250 hp for the 2bbl w/ 9.5 compression ratio
290 hp for the 4bbl w/ 10.7 compression ratio

ive got the 2bbl
how much more hp would i get if i went 4bbl ?
difference in compression worth ? hp

 

Those are gross HP numbers, so figure 80% or so for net.

Add the 4bbl, maybe 20 hp at the high end of the revs. Manifold, headers, time, wear, cam etc all affect what numbers you get.

Is this an original '69 motor or has it been rebuilt?

9.5 is a good number for 91 octane gas, based on what others post here.

 

Since it's the motor in this thread:

white chalky stuff... - Ford Truck Enthusiasts Forums

Which is weeping coolant out the freeze plugs....I would have to wonder what the rest of it looks like.

Have you heard it run?

At the very least, if it is OEM, it will be a smoker as the stock neoprene umbrella valve seals are in pieces under the valve covers and in the pan.

 

no I have not heard it run yet, but I will
the guy bought it from a friend said it idled fine and didn't smoke.
the only plastic I found was in the oil pan.
there was none left at all on the cam gear but lots of play in the chain...

 

Timing set is easy. Put a new waterpump on while you do it.

Valve seals can be replaced with the heads on with the right tool. Check with a good shop for that. Teflon seals are better, but require head disassembly. New stock neoprenes, while not "the best", are much better than old stock neoprenes.

 

85e150six4mtod

you where right on with the seals!!!
thanks for the tip
only about 4 where actually still there...

im thinking about the nylon rope trick to replace them

already did tc and wp