Safe overbore on iron 6.0L?
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TECH Junkie
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From: Port Neches, TX
Safe overbore on iron 6.0L? Hi All,
A bud has a chance to score a complete iron 6.0L with 317 heads for $150.00. He knows it's got a "Jasper Engines" sticker on it so it's likely been bored already. He doesn't care about the rotator asm, it'll be swapped out for a 408" kit. What's the limit for boring an iron 6.0?
Thanks!
Russ
A bud has a chance to score a complete iron 6.0L with 317 heads for $150.00. He knows it's got a "Jasper Engines" sticker on it so it's likely been bored already. He doesn't care about the rotator asm, it'll be swapped out for a 408" kit. What's the limit for boring an iron 6.0?
Thanks!
Russ
Thread Starter
TECH Junkie
iTrader: (11)
Joined: Jul 2005
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From: Port Neches, TX
Thanks All,
Russ
We know you meant .060 over and not .60 over
My block is .060 over and still has plenty of meat. Sonic test showed (and I am guessing from memory) @ .190 on thrust side. Depending on power levels will determine what is a "safe" thickness. Most machine shops like to see .200 when dealing with 750Hp or more. But you do hae to remember core shift, and just because this block or that block is thick enough, does NOT mean yours will. When trying to max a bore size, you need to have it sonic tested just to be sure. There were a few articles on this over teh last couple years, and there was one articl where they were sonic testing junkyard blocks and such just to show how blocks vary from one another. They found a block (and I can not remember which manufacturer) but it was STANDARD bore, and it like .100 thich. Yeah, .100. Thats it!! And I remember they were saying that that block was normally a block that could go .060 over or something like that. It was funny to think that at STANDARD bore, the block was unsafe already, and to think if someone actually tried to bore it .060 over what would have happened. WHOOPS
Remember, that when you bore you only take HALF of the thickness off. So, say you have a cylinder wall that is .200 thick and you bore it .060 over, it will leave the cylinder .170 thick. Again, you are only take half away from one side of the cylinder.Good luck, and the motto is: always sonic test
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Thread Starter
TECH Junkie
iTrader: (11)
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Russ
