383 or gm 400 block???

[rbh]

Whats the deal with the 383 strocker if the GM 400 cu inch block is almost identical to the 350 block?

 

[83Evinrude]

Re: 383 or gm 400 block???

http://www.chevymania.com/chevymania/tech/383.htm

http://answers.yahoo.com/question/index?qid=20080911213120AAhRLWv

 

[jtmarten]

Re: 383 or gm 400 block???

In reference to what? Didn't the 400 go away in the mid-70's?

If you have a 350, its very easy to upgrade to a 383 when rebuilding.

 

[ken_23434]

Re: 383 or gm 400 block???

The 400 did go away, so it's no longer available.

People learned that they could get more cubes out of their 350 by putting the crank with a longer stroke from the 400 into their 350 (some also do it with the 305) and with a .030 overbore, you get 383.

The engine is generally a torque monster. The longer stroke makes the engine not as well suited for high rpm applications though (longer stroke means piston moving faster for a given rpm, the faster you are going, the more force the connecting rods etc will experience for a given rpm).

The 383's different power band suits it well for towning and such, although there are beefed up rotating assemblies and you find some high rpm/high HP ones out there too.

People did a similar mod by using a 350 crank in the 400 block. I think that came out to 388 ci. That was a better engine for higher RPM applications.

 

[ken_23434]

Re: 383 or gm 400 block???

You can get a crank for about $150. Otherwise, all you other 350 parts will work. Well, you need new pistons, but that is always the case when you bore out the block. So, really, if you are doing a rebuild of a 350, all you really need to do is spend a little extra for the crank and you will have a 383. (might need different harmonic balancer, depending on the "type" of balance the crank, etc.. )

With just a 030 over bore, you end up with a 355.