Hard Welding/Facing of Camshaft Lobes

[GaryWilliams2003]

Hi All,

My son & me are performance tuning a Honda GX390 (389cc/23.7 cu in) single cylinder 4 stroke engine, which we use for Kart racing. The problem we now have to solve is that of the camshaft lobes.

We have the cam profile that definately improves performance and have had the standard, cast camshaft reground. Unfortunately, the higher weight valve springs needed to achieve the higher RPM causes rapid and severe wear of the camshaft lobes, rendering the camshaft useless after only two days of racing.

We have read about 'Hard Welding' camshaft lobes to survive the higher weight valve springs. Is this another name for Stellite Welding? Can anyone recommend a UK Engineering Company who could hard weld our camshafts?

Kent Cams (Kent, UK) can regrind the hardened camshaft for us, but cannot provide the hardening service.

We have a small (140 Amp) electric welder and can do basic jobs such as welding supports to our Kart frame. Can hard weld rods be used in such a welder? If so, how can we go about this.

Regards

Gary

 

[TVP]

Contact Deloro Stellite in the UK:

http://www.stellite.co.uk/

 

[ornerynorsk]

Bear in mind that there should be a selection of companies that do eutectic spray build up. Stellite is only one trade name out of several.

You could also consider flame hardening after the re-grind.