Aluminium which one

[stephen Reeks 2Participant @stephenreeks2]

I am building an edgar westbury 1831. The original casting was not the best and a combination of porous body , repeated steipping and and assembling and lack of extra meat for any slight errors has led me redoing the engineand i am going back to original spec using brass for block and cast iron for the head. And ally for the sump. The original conrods were phosphous bronze castings i think what do others thjnk would be the way forward ally / steel / brass if so what would i use.ally seems a mine field . Steel seems to be ok as it is only a slow engine but apparently brass could also be used. Any comments would ve welcome. Also using high tensile machine bolt from work to make the new crankshaft.

[stephen Reeks 2Participant @stephenreeks2]

[Bob RodgersonParticipant @bobrodgerson97362]

Stephen,

I have made several engines with HE30 con rods and all have been successful. If you are concerned about strength then use a higher grade of alloy T-6 I think would be the next grade up..

Bob.

[JasonBModerator @jasonb]

Most of the IC model engines tend to use HE15 (2014) as this has better strength and wear properites than HE30. In Westburys time this would often have been refered to a Dural.

Edited By JasonB on 07/09/2016 07:23:49

[Ian S CParticipant @iansc]

For the con rod on my latest motor I used an alloy crank from a bicycle, don't know the grade, but it can't be too bad, and it machines well.  I have a piece of 7075 Tooling Plate that I intend to use as a cylinder head, this stuff is the next best thing to steel fot strength.

Ian S C

Edited By Ian S C on 07/09/2016 13:58:11

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