what are the differences by just looking at the sb 400 and sb 350 harmonic damper
2006-12-23 12:20:32 · 8 answers · asked by Anonymous in Cars & Transportation ➔ Car Makes ➔ Chevrolet
i own a shop,and the 350 balancer is more narrow than the 400 is ,they have a big old balancer on them,,you,ll see the difference in them if you put one up against the other.that's how i always tell between those two,all other small blocks pretty much have similar balance rs to the 350,,good luck,hope this help,s.,,have a good x-mas.
2006-12-23 12:25:55 · answer #1 · answered by dodge man 7 · 0⤊ 0⤋
The two share a lot of parts, like most small block chevs. It would depend on the condition of the engine, if it's a good deal and not overbored or run out in the bottom end. 400 would give you more thump and use a bit more gas, depending on how you build the engine. This is really a personal preference thing, you will find people who will argue to the death that one is better over the other. Invariably the heads on stock 400 are cracked , you can check 20 pairs and 18 will be cracked between the bolt hole and the steam hole, this can be repaired with a sleeve in the bolt hole. some people let the crack go and get away with it. The cranks usually are good just check the thrust bearing surface at the rear journal, no wear is allowed unless you want to go for oversize thrust type bearings that are hard to find and costly. Also watch for cracks through the oil hole in the main webs of the block, usually not a problem on 400's but i have seen it a few times. Stock pistons will crack in the skirts up from where the steel strut is on the sides, most likely need replacing.
2016-05-23 02:48:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
the harmonic balancer is solid all the way around for 350 the 400 has a large piece of metal missing from one side the differance is internal balance or external balance same goes for flywheel / on flexplate it has a 4" metal weight welded to one side [400] no weight on 350
2006-12-23 12:31:01 · answer #3 · answered by jrdiz100 1 · 0⤊ 0⤋
sb 350 has two freeze plugs a side, the SB 400 has three little ones per side,, dont think you can see much with the HB
2006-12-23 14:44:33 · answer #4 · answered by rich2481 7 · 0⤊ 0⤋
A 400 dampener is externally balanced, if you look at it you will see a weight on it, a 350 is internally balanced and the dampener doesn't have a weight on it.
2006-12-23 13:17:10 · answer #5 · answered by mister ss 7 · 0⤊ 0⤋
The 350 is solid. The 400 has holes you can see through. Simplest way I can put it.
2006-12-23 12:25:56 · answer #6 · answered by mad_mav70 6 · 0⤊ 0⤋
400 SB is externally balanced. The balancer and flex plate/flywheel will have a counter weight.
2006-12-23 12:34:12 · answer #7 · answered by Anonymous · 0⤊ 0⤋
from what i know there is not much differnce i think the cast number would tell you but you need to find the infromation
2006-12-23 12:24:06 · answer #8 · answered by stuart _ 1 · 0⤊ 0⤋