2mm/3mm apex tips

Started by ssn11, January 17, 2011, 12:24:54 PM

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PGiljevic

#15
January 20, 2011, 11:21:24 PM
3mm is a much stronger seal than 2mm end of story. They can take much more detonation before breaking be it in Ferrous or Ceramic materials.

Where 3mm is inferior is chamfer wear on the leading edge.

3mm generate much more rubbing friction and heat, and they bow much easier due to this, as they do then they preferentially wear in the middle on the leading edge, when the engine cools the apex seal is missing a chunk out of the middle of it and the compression and power suffer, some to the point of not being able to restart the engine.

2mm is best
3mm is strongest but needs some other running parameter changes to make them durable due to the extra friction.
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Mir

#16
January 21, 2011, 02:18:25 AM
I agree wid u Pete, I have witnessed this in my 20b..

Exactly wat u said above is wat happened to my previous engine!! I had sever detonation but the 3mm seal survived without a single breakage or bent..

Cheers
Syed
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ssn11

#17
January 24, 2011, 04:33:33 PM
cheers for all that help guys..
any one know where in the uk is best to get 3mm corner seals from?
cheers
sean
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