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78 Posts Member #: 9073 Advanced Member Edinburgh |
20th Oct, 2010 at 08:16:57am
In the video here...
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
20th Oct, 2010 at 08:27:41am
Because the valves don't centre and wear out. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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78 Posts Member #: 9073 Advanced Member Edinburgh |
20th Oct, 2010 at 08:59:06am
On 20th Oct, 2010 Vegard said:
Because the valves don't centre and wear out. Fair enough for a road engine. Do many people building race engines use 30 degree seats? Nial. |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
20th Oct, 2010 at 09:14:18am
Don't people use 3-angle valve seats? Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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 4633 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
20th Oct, 2010 at 09:24:51am
On 20th Oct, 2010 wil_h said:
Don't people use 3-angle valve seats? Yes, but he's reffering to the actual valve seat being 30deg not the usual 45. |
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9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
20th Oct, 2010 at 09:26:37am
Oh, I see. Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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2496 Posts Member #: 1954 Post Whore Luton Bedfordshire |
20th Oct, 2010 at 12:40:54pm
Now go and get a price for these valves.
Edited by Mr Joshua on 20th Oct, 2010. Own the day
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78 Posts Member #: 9073 Advanced Member Edinburgh |
20th Oct, 2010 at 12:50:58pm
On 20th Oct, 2010 Mr Joshua said:
most inlet valves come cut with 45 degree seats which have to have extra material added to them (Stelite) then reground to the new 30 degree angle. If the back of the valve is cut at 45 degrees then you can get a 30 degree seat just by removing material. The head might need work to achieve 30 degrees without sinking the valve, though if you were getting seats replaced this shouldn't add much. ? Nial. |
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7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
20th Oct, 2010 at 12:54:13pm
I agree with Nial. This should not be expensive if fitting new seats anyway or OS valves. On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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