mygasser
Well-Known Member
they're wider due to the block deck height. 289/302 ford is 8.2", small block chevy is 9.0", 351w is the only one close to the mopar at 9.5" with the small block mopar at 9.6". all of them are 90 degree v8's so the small block ford has pistons the same 'up and down' as all the others, lol.I have thrown some parts out of both Chevy and Ford motors. I have never (probably shouldn't say this) thrown any parts out of the bottom of a Mopar engine. Yes, I know it can be done but, I feel it's much harder to do in a Mopar engine and, here is why....Rod angle, look at how much wider Mopar engines (big block and small blocks) are than the competition. The width of the engines make it much easier on the rods under load and rpm to push the piston back up the cylinder. The Ford small blocks are almost unnatural on how up and down the cylinders are and, makes more likely to put some parts on the outside of the engine...lol Rod angle, in my eyes the same reason the slant six is...well...slanted.
rod angle is to do with rod length in relation to stroke (rod ratio:- rod length divided by stroke). so how much rod angle an engine has is determined by those measurements, meaning different engine sizes even between engines of the same family will have different rod angles. generally a taller deck block tends to have longer rods so also tends to have a better rod angle (but not always). a seemingly apples to apples comparison of ford and chevy 302 small blocks, both have a 4" bore and 3" stroke but the chevy has a a 9.0" deck while the ford has an 8.2" deck. the chevy has longer rods (5.7" versus 5.09") to get the pistons to the top of the taller block so has a better rod ratio and hence rod angle.