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 4641 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
21st Jan, 2008 at 12:56:31pm
Is there any advantage in one over the other on a single or triple groove valve/collet ?
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 3756 Posts Member #: 1709 I like granny porn. LONDONSHIRE |
21st Jan, 2008 at 02:03:43pm
isnt something to with the spring lbs's? more suface area on 3 groves? On 2nd Oct, 2009 Vegard said:
On 1st Oct, 2009 Jimster said:
I bet my first wank came quicker than your first mini turbo These new modern turbos with their quick spool up time, would make the competition harder. On 15th Aug, 2011 robert said:
phew!!! thank you brett for smashing in my back doors .( not something i imagined writing... EVER) |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
21st Jan, 2008 at 06:48:44pm
Engineering judgment wold tell me 3 grooves are better. Never had problems with either.
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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 6274 Posts Member #: 509 Post Whore Isle of Man |
21st Jan, 2008 at 06:54:18pm
Des Hammil didnt like triple groove collets "Turbo's make torque, and torque makes fun"
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
21st Jan, 2008 at 07:05:52pm
Supposedly, the three grooved typs is considered weaker. I have no idea why. If you're not revving 10000rpm all the time, I wouldn't care at all. 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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3596 Posts Member #: 655 Post Whore Northern Ireland |
21st Jan, 2008 at 07:21:00pm
Subarus and LSx engines all use single groove that clamp the valve.
9.85 @ 145mph
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
21st Jan, 2008 at 08:14:40pm
according to most gurus the triple groved ones part company in VERY high reving motors
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4641 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
21st Jan, 2008 at 10:53:22pm
On 21st Jan, 2008 BENROSS said:
i think the main reason is high spring pressures and massive cam lifts with 1.5 rockers on on N/A race motors which kills them not realy an issue with turbo motors That's pretty much what i was thinking. It was a friends 1380, 286 cam, 1.5 rockers, big valve head etc which had serious wear issues on the triple collets. But he did rev it very hard. I guess either will do for most Turbo applications then. Cheers guys Phil. :) |
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9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
21st Jan, 2008 at 11:13:39pm
ZDDP Oil issues, are a contributing factor phil
Edited by BENROSS on 21st Jan, 2008.
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