Welded Cam Lobe
By gramercyjam
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This old Racer Brown (R-325 I think) cam (valve lift measured at .485") had very worn #3lobe. I tried MIG welding it and reground the lobe by hand. The results don't look encouraging. Lots of porosity and the boundary between the cam material and the weld material is visible. I am always experimenting to see what can be done. Since it took most of a day to do this, I'll try it out anyway just to see what happens.
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I know a few people were following along on this- been a while since I last posted here- but finally all came together!
Mounted up and running strong! Still a few details to work out; but runs good, sounds good, feels good on the initial pulls. Super happy it worked out!
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Well I decided to go for it -
Went with 42's and a TWM manifold. Still lots to sort out, but Ill start another thread on it somewhere and link it back here. Rought calculations hopefully put it in between an OER setup and a Mikuni PHH setup $wise.
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By duffymahoney · Posted
I would probably do them in pairs, then each pair goes to a common shaft.
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Part of running a single shared throttle shaft was for a super clean look- like how datsun_tokyo linked above has it.
I also still haven’t decided on the manifold- but was planning on the TWM one- seems to be the cleanest and allows me to run without all the linkages.
With that said I’m interested- I’ll shoot you PM.
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