Block .60 over how usable?
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Instructor
Joined: Dec 2003
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From: buffalo ny
Block .60 over how usable?
I am not a motor person so this may be a dumb question but how usable is a block that is in excellent condition but is bored .60 over already?
Thanks,
Jerry
Thanks,
Jerry
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From: Sitting in his Nowhere land Hanover Pa
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if you are just going to driver to shows and such, and not thrash it you could be fine, but if it was up to me I would pass on the motor
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From: CT
Originally Posted by Nowhere Man
if you are just going to driver to shows and such, and not thrash it you could be fine, but if it was up to me I would pass on the motor
I agree. Only usual option after .060 over is the have cylinders sleeved. Costly and not always the solution
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From: Lexington KY
Originally Posted by GCD1962
I agree. Only usual option after .060 over is the have cylinders sleeved. Costly and not always the solution
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From: CT
Originally Posted by iniguy
A .060 over 427 is fine. Even if you would have to sleeve it. Technology these days is awsome...you can fix anything. Just remember over boring increases compression ratio, so take that into consideration. A .060 over 427 is close to 440 cubes and they run great.
I conceed to the 427 guys. My experience is with small blocks. I agree you can fix anything today, but at what price
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From: Del Boca Vista FL
If it is a fresh bore that has not been run you should not experience any problems.
If it has been run over thirty thousand miles and shows cylinder wear and taper I would recommend you sleeve the block if you need to keep it for a specific reason.
What many people do not understand about sleeving a block is that a sleeve gives you a known cylinder wall thickness. This is something you do not know when you just grab a block and start using it unless you have the block checked sonically for cylinder wall thickness. A 1/8 wall sleeve requires boring 125 thousandths out of the original block and, sometimes, you don't hit water jacket even then. We used to bore 283 blocks out 125 thousandths to make 301's out of them on a regular basis and did not encounter water jacket intrusion. AND you can bore a 1/8 wall sleeve up to 60 over and still use it.
IF you end up sleeving a block then you also need to deck the block surfaces and align bore the main saddles to true everything up. When you install eight sleeves in a block you introduce stress into the block and you need to correct them.
Personally, I would not invest in placing eight sleeves into a block because of the cost involved. NOT because I don't trust or like a sleeved block. This would be ONLY if I could not replace the block or if I were a numbers person, which I am not.
Rich
If it has been run over thirty thousand miles and shows cylinder wear and taper I would recommend you sleeve the block if you need to keep it for a specific reason.
What many people do not understand about sleeving a block is that a sleeve gives you a known cylinder wall thickness. This is something you do not know when you just grab a block and start using it unless you have the block checked sonically for cylinder wall thickness. A 1/8 wall sleeve requires boring 125 thousandths out of the original block and, sometimes, you don't hit water jacket even then. We used to bore 283 blocks out 125 thousandths to make 301's out of them on a regular basis and did not encounter water jacket intrusion. AND you can bore a 1/8 wall sleeve up to 60 over and still use it.
IF you end up sleeving a block then you also need to deck the block surfaces and align bore the main saddles to true everything up. When you install eight sleeves in a block you introduce stress into the block and you need to correct them.
Personally, I would not invest in placing eight sleeves into a block because of the cost involved. NOT because I don't trust or like a sleeved block. This would be ONLY if I could not replace the block or if I were a numbers person, which I am not.
Rich
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From: CT
Originally Posted by BADBIRDCAGE
If it is a fresh bore that has not been run you should not experience any problems.
If it has been run over thirty thousand miles and shows cylinder wear and taper I would recommend you sleeve the block if you need to keep it for a specific reason.
What many people do not understand about sleeving a block is that a sleeve gives you a known cylinder wall thickness. This is something you do not know when you just grab a block and start using it unless you have the block checked sonically for cylinder wall thickness. A 1/8 wall sleeve requires boring 125 thousandths out of the original block and, sometimes, you don't hit water jacket even then. We used to bore 283 blocks out 125 thousandths to make 301's out of them on a regular basis and did not encounter water jacket intrusion. AND you can bore a 1/8 wall sleeve up to 60 over and still use it.
IF you end up sleeving a block then you also need to deck the block surfaces and align bore the main saddles to true everything up. When you install eight sleeves in a block you introduce stress into the block and you need to correct them.
Personally, I would not invest in placing eight sleeves into a block because of the cost involved. NOT because I don't trust or like a sleeved block. This would be ONLY if I could not replace the block or if I were a numbers person, which I am not.
Rich
If it has been run over thirty thousand miles and shows cylinder wear and taper I would recommend you sleeve the block if you need to keep it for a specific reason.
What many people do not understand about sleeving a block is that a sleeve gives you a known cylinder wall thickness. This is something you do not know when you just grab a block and start using it unless you have the block checked sonically for cylinder wall thickness. A 1/8 wall sleeve requires boring 125 thousandths out of the original block and, sometimes, you don't hit water jacket even then. We used to bore 283 blocks out 125 thousandths to make 301's out of them on a regular basis and did not encounter water jacket intrusion. AND you can bore a 1/8 wall sleeve up to 60 over and still use it.
IF you end up sleeving a block then you also need to deck the block surfaces and align bore the main saddles to true everything up. When you install eight sleeves in a block you introduce stress into the block and you need to correct them.
Personally, I would not invest in placing eight sleeves into a block because of the cost involved. NOT because I don't trust or like a sleeved block. This would be ONLY if I could not replace the block or if I were a numbers person, which I am not.
Rich
Couldn't you also get a 301 ci using a 327 block with a 283 crank?
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From: Sitting in his Nowhere land Hanover Pa
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Originally Posted by BADBIRDCAGE
GDC1962. Your thinking is correct, but not until the 327 came into production.
Rich
Rich
sorry I could not help my self on that
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From: CT
Originally Posted by Nowhere Man
then you must be old
sorry I could not help my self on that
sorry I could not help my self on that
No problem. Sometimes you have to work your brain to remember some things. I remember a good friend did that in the early-mid 60s so that his corvette would make the weight/ci break for NHRA. I am over 60, so I guess I now qualify as old! Oh well lots of great old memories. Another brain tester wouldn;t you get something like 272 ci. If you used a 283 crank in a DZ 302 motor?
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From: Del Boca Vista FL
Yeah, I'm old too. I worked as an automotive machinist for 15 years many moons ago.
One of my faborite vendors was Jahns pistons. They would make anything you asked for. We had them make pistons for V-16 Cadillacs, V-12 Lincolns, Pontiac Super Duty motors, and I think my favorite was a 4 5/8 diameter piston for an air compressor. (We sent them the broken original piston and and wrist pin and they went to work making us a new one)
Another reason we bored out lots of 283's in the old days is because they were plentiful and available.
On a side note, I attended a car show today and saw a real 63 Supercharged Studebaker Avanti. (Not one of the Avanti II reproductions) Had almost forgotten they made them.
I guess I really AM old.
Rich
One of my faborite vendors was Jahns pistons. They would make anything you asked for. We had them make pistons for V-16 Cadillacs, V-12 Lincolns, Pontiac Super Duty motors, and I think my favorite was a 4 5/8 diameter piston for an air compressor. (We sent them the broken original piston and and wrist pin and they went to work making us a new one)
Another reason we bored out lots of 283's in the old days is because they were plentiful and available.
On a side note, I attended a car show today and saw a real 63 Supercharged Studebaker Avanti. (Not one of the Avanti II reproductions) Had almost forgotten they made them.
I guess I really AM old.
Rich