Quote:
Originally Posted by Jerry Clayton
itstock----have you ever weighed any of the parts???keep in mind that the weights of the available alternators, starters,etc will be pretty much the same, the oil pumps and distributors the same, front covers/waterpumps fairly close, front dampners the same, flywheels can be anywhere but available at what ever weight you want so in real--the same---it pretty much gets down ti weight of internal rotating parts and the weight of most of the available present day cranks, rods,pistons are pretty close--------
I'm thinking that most of this misconception comes from looking at iron head/manifold FEs compared to the 289/302 small blocks and not the much heavier 351w blocks----
But-------I've weighed lots of parts over the years--------and the huge differances that people speak of is sorta like comparing camels to horses------------ |
Exactly, it's hard to get an exact difference. But basic "crate" engines, I've seen anywhere from 140 to 180 for the FE (below 428).
Iron to iron 351 vs 390FE is recorded as 510 vs 650 at a bunch of different places. So a basic comparison is that the 390 series weighs at least 140 pounds more. An iron 460 is going to weigh in to the 700's.
DIfferent numbers yet again, but this is also listed on various sites.
221-302W = 460
302 Boss = 500
351W = 525
351C-Boss = 550
351M-400 = 575
332-428FE = 625
427 HEMI = 680
429-460 = 720
429-Boss = 635