differences in 289 and 302
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From: Dayton USA
differences in 289 and 302
I was just wondering if a 289 crank could be used in place of a 302 crank. THere would be a loss of compression? Would the 302 rods even work? What other problems would there be?
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From: Oregon: Land of the Majes
differences in 289 and 302
Well, the cranks are interchangeable, but you have to use the 289 connecting rods as well....the pistons are the same. i would not use a 289 crank in a truck motor....the 302 is too small for a full size truck anyway...
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differences in 289 and 302
lvmoose007,
Ah, but we ALL know - there is only one lvmoose007!
The rest are just pale imitations...
Later,
Ah, but we ALL know - there is only one lvmoose007!
The rest are just pale imitations...
Later,
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From: Willamette Valley Oregon
differences in 289 and 302
Originally posted by lvmoose007
Well, the cranks are interchangeable, but you have to use the 289 connecting rods as well....the pistons are the same. i would not use a 289 crank in a truck motor....the 302 is too small for a full size truck anyway...
Well, the cranks are interchangeable, but you have to use the 289 connecting rods as well....the pistons are the same. i would not use a 289 crank in a truck motor....the 302 is too small for a full size truck anyway...
The sum of the crankshaft throw, connecting rod length, piston compression height, and deck-height clearance must not exceed a block's deck height. If they do, you'll be buying another engine.
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From: Oregon: Land of the Majes
differences in 289 and 302
well, if I am doing my math correctly, about a 15% loss of low end torque by using a 289 crank....you can make it up by slinging it a bit higher in the rpm range.
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From: Independence, MO
differences in 289 and 302
I dont know you all are getting this info from but everything in a 289 and a 302 are interchangeble.
I,ve biult them and i've done it! the difference in the two motors is the wrist pin height in the piston, this argument has been going on for decades, take the two side by side strip the blocks, swap the parts and reasemble them, i guarante they will work, this missinformation in these books or wrong! DW
I,ve biult them and i've done it! the difference in the two motors is the wrist pin height in the piston, this argument has been going on for decades, take the two side by side strip the blocks, swap the parts and reasemble them, i guarante they will work, this missinformation in these books or wrong! DW
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From: Oregon: Land of the Majes
differences in 289 and 302
Ditto....although rod bolt clearance might be a little tight when tossing a 302 crank into an early 289 block...the 302 nlocks have notches in the bottom of the cylinder walls for connecting rod clearance...
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differences in 289 and 302
The difference is the wrist pin height in the pistons? I don't think so. The 289 rods are 5.155" long vs. the 302's 5.09". This difference is to make up for increasing the 2.87" stroke of the 289 crank to 3.00" for the 302. It's the pistons that are identical EXCEPT that the pre-'70 blocks use a piston for a deck height of 8.185"; after that, the block has an 8.20" deck height. The crank journal diameters and widths are the same, BUT they changed the balance factor and went to a one-piece rear seal on the later 302's (5.0L). The notches on the bottoms of the cylinder bores found on the 302 block aren't needed on a 289 block as the cylinders don't extend as far into the crankcase.
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