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 4890 Posts Member #: 1775 Post Whore Chester |
21st Jan, 2011 at 10:18:41pm
Thats what I have read, I think that the SC12 kit version I have should help little as its turned down but then it also has a belt attached. Who knows..
On 21st Jan, 2011 TurboTom said:
In the yellow bible uncle David writes on page 366 that it should be use at all times, though it can be machined down on light weight 850 and 1000. I run a supercharger and I don't care the TB is on the wrong side.
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 1030 Posts Member #: 1291 Post Whore Suffolk / Birmingham |
21st Jan, 2011 at 10:28:34pm
i think you will find that after a certain point (in the 1970s!) they were fitted to every a-series.
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
22nd Jan, 2011 at 08:25:44am
Out of all the 998 engines I have (11) all A+ so all later than '82ish only two had harmonic dampers.
On 21st Jan, 2011 slater said:
i think you will find that after a certain point (in the 1970s!) they were fitted to every a-series. Im guessing there was a point to that (Ive never had a 998 without one!!) 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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 257 Posts Member #: 7048 Senior Member Bridgend |
25th Jan, 2011 at 02:24:17pm
I've had 4 998 engines, and the current one is the only one that does not have a damper. Its actualy the first non-damped pulley I've seen. Turbo parts collector at the moment, almost ready. |
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4309 Posts Member #: 1321 Post Whore Wiltshire |
25th Jan, 2011 at 06:16:02pm
I have an original 1988 998 engine without one.
On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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 9502 Posts Member #: 1023 Post Whore Doncaster, South Yorkshire |
25th Jan, 2011 at 07:13:08pm
i had an '86 998 without, and a similar aged 998 metro engine with Yes i moved to the darkside |
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 7265 Posts Member #: 1268 The Boom Boom speaker Police! Essex |
25th Jan, 2011 at 08:58:40pm
I have a 998 from an 86 Chelsea without. In the 13's at last!.. Just |
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9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
26th Jan, 2011 at 07:40:56am
I think what we are seeing here is that ther were fitted to Metros and not Minis 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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 10022 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
26th Jan, 2011 at 08:21:59am
I've seen 1 (what I believe was a) mini engine with. An unleaded 998. If something is worth doing, it's worth doing half of. |
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
26th Jan, 2011 at 08:22:27am
On 26th Jan, 2011 wil_h said:
I think what we are seeing here is that they were fitted to Metros and not Minis That matches what I have seen (although from a very small sample, one 998 Mini and one 998 Metro). It makes me wonder if the mass of the fan, which the Mini has and the Metro doesn't, being driven through a flexible belt, plays some part in the damping process ??? Schrödinger's cat - so which one am I ??? |
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9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
26th Jan, 2011 at 09:13:26am
That is a very interesting thougtht
On 26th Jan, 2011 Rod S said:
On 26th Jan, 2011 wil_h said:
I think what we are seeing here is that they were fitted to Metros and not Minis That matches what I have seen (although from a very small sample, one 998 Mini and one 998 Metro). It makes me wonder if the mass of the fan, which the Mini has and the Metro doesn't, being driven through a flexible belt, plays some part in the damping process ??? 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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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
26th Jan, 2011 at 10:37:40am
It's the sort of thing you initially dismiss as the fan is light compared to a damper pulley, but only part of the damper pulley is the damping mass (most of the mass is in the centre hub) and the most relevant formula is I=(mr^2)/2 and the radius of the fan is an awful lot bigger than the pulley so the ^2 has a significant effect.
Schrödinger's cat - so which one am I ??? |
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617 Posts Member #: 6558 Post Whore Pueblo, Colorado, USA |
5th Apr, 2011 at 12:30:55am
Have you thought about KAD's viscous dampener? https://secure.surfinteractive.co.uk/cgi-bi...arts:MiniEngine
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