Hi I need some help to determine if this block is any good for a 550 - 600hp build? The plan is more than 500 cui NA, street/strip car, around 4000lbs. I need a better tool to measure the bore, I get it around 4.346" - 4.35" is that a 0.030 or a 0.040 over? It is the missing piece of the cylinder wall below where the piston/rings are at BDC that concerns me. It looks to be one of late blocks. Here are some more pics of the block. Any advice is much appriciated.
You need to get the sonic check performed. Use this thread as a reference: http://www.v8buick.com/index.php?th...od-first-time-engine-build-experience.359537/
That is indeed a 76 block......butbthst big of chip would worry me.... Not for piston support but it could possible continue to chip or crack there
No huge concern for the missing piece deburr it etc,..but as easy as blocks are to procurei woukd get another...but a 470,. 482 or 494 is a much better option,..especially for your mild HP goal,..or even just a 464 if the bores clean up
Looks like the passage to the pump is also cracked, and possible a hairline crack on the opposite side of the skirt from the missing piece. That hole may have lots of trouble hiding in it.
I think you are correct. After looking again, it does look like a "mismatch" on the oil passage, and the shadow to the left fooled me. No wonder hand shadow puppets always seemed so real.
Ethan is correct to get 500+ cubes take a crank other than factory to get there. But your hp goals are well within reach of not going to that expense.
You could do a 482 or 494 with a stock block and crank,and make plenty of power. There are guys making that power with no girdle,but I would run one,especially since you haven’t started the build yet. Because we all want to make more power later.
Yes, I'm going to do the sonic check. But wanted to start with the missing piece of cylinderwall. Thanks for the link.
Happy it is a late block. I will do the sonic check, so cross fingers that it will pass that. Looked at the missing piece and it is already deburr. So it must have been running with the piece missing. Yes, I know I can get more HP from less CUI and also that I would need a special crank get the stroke needed, however I always wanted a motor with more than 500cui - it sound's good saying 523 or 528 Looked at it today, it is only mismatch. Does not look like a problem at all. Thanks for the good ideas. It is worth considering for sure. I'm in Denmark, not sure how many machine shops I would trust to do the girdle. However there is a raceshop in Malmo, Sweden that might be able to do it. I will talk to them.
Hoped it would be a .030" over. However the bores look OK, I will get it cleaned so I can get a better view and get a better measure.
Keep in mind that the girdle basiclly requires a customer oil pan.......so girdle, pan, labor to install is going to be 2k+......its not a very simple install when done right
A lot guy's have a 470 or 482,or 494.With these,with the HP you are looking for,you will not need a girdle,most guy's have a 470 with 600 HP and more and these cars have been running for a long time with no problems. Just remember that Buicks like big carbs,they are not Mopars or Chevy's.Bruno.
I've always heard that about buick.....they like big cfm carbs for the airflow, not really for the fuel......I sometimes question if my 1050 is big enough for my 464 racemotor
It’s an air pump. How much air can you move and how fast can you move it. How high are you slinging that 464?
