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internal, external, SFI fluid damper???

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Old Feb 22, 2006 | 12:48 PM
  #1  
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ReGGaTarT
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internal, external, SFI fluid damper???

I have a 400 engine ready to rebuild with cleveland 2v heads, 268H comp cams, roller rockers...
What type of Harmonic damper should I use?
Why?
 
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Old Feb 22, 2006 | 01:08 PM
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You should get an aftermarket rated for 6000 rpm. A fluid damper has been the subject of some discussion hear in the past. If it were to be only a track vehicle the fluid is the way to go. For the street some have said, (a large retailer who does sell them told me as well) that over time the fluid can begin to gel up, especially is it is not driven regularly, and therefore put you out of balance. Others dispute this, but if it's for the street just get wone that is rated above the rpm you will be turning. You want an external balance one as that is what the 351m/400 engine is.
 
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Old Feb 22, 2006 | 01:26 PM
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thanks!
I saw some very cheap dampers on e bay.
http://cgi.ebay.ca/Pro-Products-Ford...QQcmdZViewItem
Anyone knows if it's a reliable damper?
 
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Old Feb 22, 2006 | 01:39 PM
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It's odd that they don't have an rpm recomendation on that unit even though they mention racing. I would give mad dog a call and ask them. I've dealt with them and they have been very helpful.
 
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Old Feb 22, 2006 | 05:43 PM
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That balancer is by Professional Products. It's an import, but a nice piece. The one they are selling we also have on the self at $64.99, so that's not a bad price. The picture is an SFI unit, as stated the one they are selling is not. They have a spacer that you also purchase depending on your application.
 
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Old Feb 22, 2006 | 07:05 PM
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What rpm is the damper?What is SFI?
 

Last edited by ReGGaTarT; Feb 22, 2006 at 07:21 PM.
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Old Feb 22, 2006 | 08:35 PM
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SFI is a rating given to dampers that show they are of a certain quality level. Most non stock racing requires one. I'm sure Tim can tell you what his is rated for rpm wise.
 
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