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| 90 degree V4 OHC |
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| NickG:
Doug, Can't see the pics here (something to do with our server) but posting as a place holder for now so I can look when I get home! :thumbup: Will definitely be following this one. Cheers, Nick |
| Bernd:
--- Quote from: dbvandy on March 15, 2011, 01:01:36 AM ---It is made in 5 parts (the inverted cup that rides on the cam and over the guide is not made....) The valve is 1/8th inch rod and the head is silver soldered on... not so sure about this... might make them all out of one piece like I did on the other engines... any suggestions? Doug --- End quote --- Doug, I've never built a IC engine so take this with a grain of salt. I would think that the closeing of the valve and it hitting the valve seat would stretch the the head off of the stem and you would loose compression after a while. Just my thought on that. Bernd |
| dbvandy:
--- Quote from: Bernd on March 15, 2011, 10:22:17 AM --- --- Quote from: dbvandy on March 15, 2011, 01:01:36 AM ---It is made in 5 parts (the inverted cup that rides on the cam and over the guide is not made....) The valve is 1/8th inch rod and the head is silver soldered on... not so sure about this... might make them all out of one piece like I did on the other engines... any suggestions? Doug --- End quote --- Doug, I've never built a IC engine so take this with a grain of salt. I would think that the closeing of the valve and it hitting the valve seat would stretch the the head off of the stem and you would loose compression after a while. Just my thought on that. Bernd --- End quote --- There are plans that call for the head to be silver soldered onto the stem, but it just concerns me. Does anyone have a screen shot of the instructions that explain how to make the two part valve? Is there supposed to be a slot in the stem to help it lock onto the head? Is there a particular percentage of silver needed or will plumbing silver solder be ok? Thanks Doug |
| NickG:
Doug, I'm sure I've heard of / seen this somewhere before but can't help with specifics, sorry! Nick |
| dbvandy:
Most of the time spent making engines is making jigs that most likely will never be used again.... I think I have the head about figured out... now if I can make four that are all the same. I made up 3 guide blanks to see what it will look like. There will be an inverted stainless cup to cover the valve and contact the cam. This is most likely just the prototype. After I know how to make one, then I will make 4 more. More to come... Doug |
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