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Old 22nd March 2012, 12:27 AM   #1121
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Quote:
Originally Posted by sippy View Post
and engine heads should not be ground this way, realy realy basic eng. theory
Eeh, hand or machined ?
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Old 22nd March 2012, 12:28 AM   #1122
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Quote:
Originally Posted by sippy View Post
and engine heads should not be ground this way
You probably refering to my post.

Who said anithing about engine heads?

I was talking about hand lapping walve seats

each valve on its own seat and that is the proper way to do it after engine is out of machine shoop epecialy on marine diesels with loads of pressure in the pistons.

But this is off topic so I am going to shut the Fluf up and say no more.

Hope you got same constructive to say about F5 as for now you are very much giving me the impression that you are triing to belitle me.

No need for that I do plenty of it by myself.
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Old 22nd March 2012, 12:29 AM   #1123
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Originally Posted by labjr View Post
It can probably be modified to do what you need. The relays look like some made by Omron I've seen in appliances. I think they are universal standard sized, but not positive. Hard to beat for the money though.
the size is standard, yes
it is 2pc 30A relè's.
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Old 22nd March 2012, 12:30 AM   #1124
a.wayne is offline a.wayne  United States
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Copper ....

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Old 22nd March 2012, 12:30 AM   #1125
labjr is offline labjr  United States
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Originally Posted by a.wayne View Post
The price is scary ...... will it work .?
It's the board that I want if for. Looks like decent quality. It's got a transformer, two relays, a 555 timer etc. Wonder if he sells a kit version?
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Old 22nd March 2012, 12:31 AM   #1126
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Quote:
Originally Posted by jacco vermeulen View Post
Eeh, hand or machined ?
Jacco got the impression that we know this chap or its like alredy....

One more customer for my ignore bin I think
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Old 22nd March 2012, 12:52 AM   #1127
sippy is offline sippy  United Kingdom
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Heads should be flat and rough - engine blocks should be flat and rough - gasket fills the voids.
Exceptions are 'Wills Rings', requiring 'material retention' and 'Button Heads' which are quite esoteric.
For thermal transfer, hand (or flat bed grind / polish) lapping the heat spreader and heat sink rear surface to a mirror interface, as Blk did, is good, one step further would be to lap the output device/s to the spreader.
This is, of course, is just my 1p's worth, gained from 20+yrs of dealing with high and ultra high performance engineering re engine building.
For my sinks, I'm going Mr.Pass BA style, but BIG, slow forced air and a slight twist.
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Old 22nd March 2012, 12:53 AM   #1128
sippy is offline sippy  United Kingdom
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i will, from now on, keep my thoughts to my self ect ect
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Old 22nd March 2012, 01:02 AM   #1129
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Sippy,

Do you want to prototype the boards?
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Old 22nd March 2012, 01:20 AM   #1130
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Quote:
Originally Posted by sippy View Post
i will, from now on, keep my thoughts to my self ect ect
Please don't, nice to have propper discussion so there is no need for that and from your post is clear that you missed bit about hand lapping valve seats.

So just apologise for missing that part and I will make ammend by publicaly stating that, as at times this forum is plagued by "professors" that get hi on belitoling other peoples, I was wrong to snap up and bite.

Italian temper having best of my senses as my personal excuse.
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