What is involved in boring / honing a block
21 November 2008, 07:06 PM
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What is involved in boring / honing a block
Guys,
I am sure this is a service we can offer in the future but have never done one as of yet.
We most likely have all the tools / machine's to do this as we do have a large workshop but is there anything technical I should know ?
What sort of limits are they bored to? + anything else I would need to know
I am sure this is a service we can offer in the future but have never done one as of yet.
We most likely have all the tools / machine's to do this as we do have a large workshop but is there anything technical I should know ?
What sort of limits are they bored to? + anything else I would need to know
i'm needing mine done.
22 November 2008, 08:01 AM
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If you have to ask, you can't do it, its highly specialised knowing the size to bore to to match the pistons, and honing requires a special machine.
Simon
Simon
22 November 2008, 08:29 AM
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LOL there's loads of stuff I had to ask (not about boring) - and now I can do them, bloody well. You might as well put forward the idea that all learning is pointless.
22 November 2008, 09:25 AM
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Thats not to say you cant learn to do it but as said its a very exact process 1 slip and your ruined someones parts. the tolerances are typicaly within .001" so first youd have to have the very specialised machinery then youd have to learn to use it and not on customers parts then youd find that a you cant charge that much for a bore and hone, you wouldnt be able to do just scoobies your have to do all sorts to make the machinery pay for itself so the machine would have to be capable of doing all blocks and so would end up a compromise for scoobie blocks.......there are good places around easier and quicker to leave it to the pro's
of cource thats just my oppinion
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22 November 2008, 10:33 AM
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Totaly agree,
Thats not to say you cant learn to do it but as said its a very exact process 1 slip and your ruined someones parts. the tolerances are typicaly within .001" so first youd have to have the very specialised machinery then youd have to learn to use it and not on customers parts then youd find that a you cant charge that much for a bore and hone, you wouldnt be able to do just scoobies your have to do all sorts to make the machinery pay for itself so the machine would have to be capable of doing all blocks and so would end up a compromise for scoobie blocks.......there are good places around easier and quicker to leave it to the pro's
of cource thats just my oppinion
Thats not to say you cant learn to do it but as said its a very exact process 1 slip and your ruined someones parts. the tolerances are typicaly within .001" so first youd have to have the very specialised machinery then youd have to learn to use it and not on customers parts then youd find that a you cant charge that much for a bore and hone, you wouldnt be able to do just scoobies your have to do all sorts to make the machinery pay for itself so the machine would have to be capable of doing all blocks and so would end up a compromise for scoobie blocks.......there are good places around easier and quicker to leave it to the pro's
of cource thats just my oppinion
Nothing different on a scoob block to any other i've worked on????
Dont get your compromise thing?
22 November 2008, 01:32 PM
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Pistons should be supplied with the data for running clearances, my Imp was run i grade out for extra clearance at high revs, 10,000 rpm !
Good Luck !
DunxC
Good Luck !
DunxC
23 November 2008, 09:44 AM
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Honing specs are typically stated in microns (1/1000 of a mm) relating to avearge roughness, and measurement of such things as plateau to trough ratio (assuming you plateau hone as most do now), you'll also need a tallysurf or similar to measure your honing, that alone is over £1250 (http://www.angelfire.com/biz/telist/index.html).
Nagel machines are very good. Nagel Precision USA | Machine Types (poor internet link so can't be bothered to look for a non US website)
Simon
Last edited by The rookie; 23 November 2008 at 09:54 AM.
23 November 2008, 10:20 AM
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boring machine is probably not the usual rebore centre type machine....
these guys work on some prety exotic stuff they are good freinds of mine but wouldnt do the scooby even though i am a regular customer with my other stuff
Last edited by Badbird; 23 November 2008 at 10:25 AM.
23 November 2008, 05:33 PM
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Boring is relatively easy, its the honing (which will cut out the last 0.25-0.5mm typically) that is critical, I'm guessing they are professional enough not to hone something they don't know the correct specs for.
Simon
Simon
23 November 2008, 05:47 PM
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I wouldnt think that would be a problem for them as they design engines, spec their own camshafts, make billet cylinder heads rods.pistons ect so there has to be a prety severe reason they wouldnt do this...i can only imagine their equipment wont handle it for some reason
Last edited by Badbird; 23 November 2008 at 05:48 PM.
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