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Big Block Install Questions and Answers Special Category just for asking questions about installing a Big Block in your Trifive Chevy.

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Old 04-04-2017, 02:44 PM   #61
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Some of them were over 600 hp engines, one of them had 3 sleeves installed...
The adjacent cylinders are not very round with a sleeve next to them.

I have sleeved quite a few blocks but cracked cylinders for performance build not a good idea which has been disgust by others here who have also seen the problems I have seen.

If my name is going on it i would not waste my time with a block with a cracked cylinder. I have seen it be a waste of time more then once.
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Old 04-04-2017, 07:09 PM   #62
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The adjacent cylinders are not very round with a sleeve next to them.

I have sleeved quite a few blocks but cracked cylinders for performance build not a good idea which has been disgust by others here who have also seen the problems I have seen.

If my name is going on it i would not waste my time with a block with a cracked cylinder. I have seen it be a waste of time more then once.
Sometimes you have no other choice when the customer demands that's what he wants, and yes the adjacent cylinders will be out of round, that's why you bore the block after sleeving.Ask the NASCAR guys how many sleeves they install..
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Old 04-04-2017, 10:40 PM   #63
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Sometimes you have no other choice when the customer demands that's what he wants, and yes the adjacent cylinders will be out of round, that's why you bore the block after sleeving.Ask the NASCAR guys how many sleeves they install..

Ask the NASCAR guys if there dealing old GM blocks with cracked cylinders, LMAO

You really should compare apples to apples here.

I would pass on a job putting a sleeve in a cracked cylinder on build that's 600 horse. The choice would be take it some where else no questions asked.

Its hard some times to make chicken soup out of chicken shyt.
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Old 04-05-2017, 09:03 AM   #64
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Its all a cost/risk/benefit analysis. Can a cracked blocked be sleeved, of course it can. Will it hold up, plenty of them have, including as we have learned above, some fairly high horsepower motors. Is it worth taking the chance? That is where the cost/risk/benefit analysis comes in and each person has to decide for himself whether fixing a broken cylinder or block is the best approach under the circumstances. My 261 6 cylinder truck blocks are rare as hens teeth here on the east coast. If I had a cracked cylinder and no other alternative, yes I would take the chance and sleeve the block. If I had access to a nice clean block as a replacement, no I would not sleeve the broken block, but thats just me.

Here is what I can say, having been lucky enough to be able to hang around some really sharp engine builders when I was a kid, the one thing I can honestly say is that I never once observed one of those builders use a broken or cracked block right off the bat as the foundation for a new motor. Not once did I see that. And frankly I had them reject a 261 block I wanted to use because two of the cylinders had shifted and did not have enough wall thickness and thus strength. I could have sleeved them, we talked about dry sleeves and possibly wet sleeving them but in the end they convinced me that the best alternative was to get another block, which I did. I never had a problem with that motor. Maybe I would not have had a problem if I had sleeved the other block but it would have always been on my mind. So I always opt for a good block as my starting point.

Notwithstanding, I am absolutely not saying you can't sleeve a block, or that a sleeve will fail, not at all. What I am saying is that if you can get a replacement that does not need that kind of remedial work right off the bat, in my opinion you will probably be a little better off in the long run. Like I noted before, if you are going to build or rebuild a motor, use the best foundation that you can, then careful machining, good quality parts and clean careful assembly. I am a total rank backyard amateur which makes me want to be extra conservative and careful in how I approach a build. Others may not be quite so conservative and end up with a good build. Its all about cost/risk/benefit analysis.
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Old 04-05-2017, 09:11 AM   #65
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Ask the NASCAR guys if there dealing old GM blocks with cracked cylinders, LMAO

You really should compare apples to apples here.

I would pass on a job putting a sleeve in a cracked cylinder on build that's 600 horse. The choice would be take it some where else no questions asked.

Its hard some times to make chicken soup out of chicken shyt.
I priced an ro7 block from one of the cup teams a couple of years ago with a sleeve,5 thousand smackers...
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Old 04-05-2017, 11:52 AM   #66
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I priced an ro7 block from one of the cup teams a couple of years ago with a sleeve,5 thousand smackers...
I have seen alot of old Cup blocks over the with composite sleeves installed. They started with brand new blocks with no cracks in the cylinders LOL
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Old 04-05-2017, 01:40 PM   #67
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Right, and that makes my point. 5 thousand smackers for a motor with a sleeve. There, the cost/risk/benefit analysis moves you to fixing the block. If a repaird block was 5K a good replacement would have been significantly more.

A very good friend of mine builds race cars for a living and drove an NHRA comp eliminator car the last two years for one of the comp teams. The motor was this custom inline 6 aluminum casting, crazy expensive, the block alone rumored to be in the 40K-60k range. Yes, a cracked cylinder, I might sleeve that one, lol. But to start out with a fresh build on a common and commonly available block with a cracked cylinder, no way. At least not in my book.
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Old 04-05-2017, 09:41 PM   #68
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Well... Guy seemed a little sketchy, nothing showing any new parts so I'm over it. This little "engine" journey has been over 2yrs in the making & I'm ready for results. I'm sending back the parts I have.... and having a turn key 600hp Sbc built. It will drop in, no need for any new parts off the bat to work...

Ready to get in the truck & feel like the truck makes me feel. I've dreamed of these era trucks since I can remember. Finally got one roughly 6yrs ago.... it's TIME for step 2 lol. I've known the builder for roughly 15yrs & feel good about it. I'll snap some pics etc as hopefully quick progress is made!
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