4.1 block #

[SIXBANGR]

553 any good for a built 4.1? Where are you guys getting pistons? Anyone using Chevy 4" pistons?

 

[49-blues]

I have a set of new stage2 4.00" diamonds for sale set of 8-$275. shipped

 

[sixgun86gn]

Don't know about a 553. Most of the ones I have seen built are the 484 and 291 castings.

I know the 84-85 4.1's have larger oil passages.

 

[87GNSteve]

553 any good for a built 4.1? Where are you guys getting pistons? Anyone using Chevy 4" pistons?

That block is the obscure 4.1; do you have pics of the block especially the head bolt hole water jacket area you can post?
There is a thread about these blocks some where, a pic would help us to compare them to the 484 or 291.

 

[Powder]

Im building a "291" block with JE custom pistons. They aren't cheap but they know their business and can answer any questions you might have before you make any commitments.
Check them out.
MH

 

[Nasty Wendy]

That block is the obscure 4.1; do you have pics of the block especially the head bolt hole water jacket area you can post?
There is a thread about these blocks some where, a pic would help us to compare them to the 484 or 291.

The obscure one is the 044 casting. The 553s can be found here and there.

 

[SIXBANGR]

no one on here knows any thing about this block?

 

[Nasty Wendy]

no one on here knows any thing about this block?

Its one of the three castings commonly found in production GM cars from 1980-1984. The #291 casting is said to be beefier in the deck area around the headbolt holes that are next to the water passage into the head. The #484 casting is said to have better oiling passages of the three. The #553 is said to be............ well it isn't said to be anything but it was used everywhere the other two were used. One of the board members is building/has built a #044 casting and said it is beefier than the #291. That particular #044 is the only one we know of in existance but we do know that he isn't full of chit and does actually have an #044 casting which is listed as used by Cadillac on this chart.Sheet1

 

[turbofish38]

I have a #553 block that came out of a 1980 LeSabre so we can difinetly say that it was the early casting. Maybe it doesn't have any of the qualities of the later castings?

 

[getchasum]

For what it's worth.......

 

[getchasum]

Casting is 25520044 and more pics......

 

[Nasty Wendy]

For what it's worth.......

How is it running?

 

[getchasum]

How is it running?

Still on the stand but it should be in the new project car this spring (White T w/ Blk trim)

Doing the turbobuick.S budget build up

Had all three castings together, the 291, 0044 & 553, the visual inspection the 0044 block looked beefier than the others in the deck area.

 

[Nasty Wendy]

cool

 

[1chance]

I have the 0044, and it is beefy. You can find the post with pics at 4.1 production builds.

 

[SilverBulletGN]

Thanks for posting this info It sheds somelight on the 4.1 Blocks.