Hi guys, this looks to me to be gray cast iron based on what I've seen. But thought I'd ask the brains trust your opinion!



I was hoping it is cast steel to make it easier to weld, but I suspect cast iron is the go unfortunately - whaddaya reckon?

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Build thread for Supercharged 1275 1967 Deluxe Resto
Build thread for Mini ute conversion 998cc Turbo

Better pic maybe

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Build thread for Supercharged 1275 1967 Deluxe Resto
Build thread for Mini ute conversion 998cc Turbo

Aaannnddd here's the video of it (sorry for multiple posts!!)

https://youtu.be/OS6oDFeeV1w

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Build thread for Supercharged 1275 1967 Deluxe Resto
Build thread for Mini ute conversion 998cc Turbo

Grey cast iron. Welded plenty over the years.
Stick weld it with nickel electrode. Cigweld castcraft 100.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Sweet thanks doc I was going to use my MIG but my father in law has stick, so I could use that (and I know stick is the goto choice). Some youtube welders show MIG method (preheat, weld to mild steel, cool very slowly) so I was going to use that method initially.

I might use this as a learning experience. I'm cutting off all of the primary pipes on that manifold/housing, so I might use the scrap pieces to try cast iron to mild steel in stick, and then try another version in MIG and see the different results for interest sake.

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Build thread for Supercharged 1275 1967 Deluxe Resto
Build thread for Mini ute conversion 998cc Turbo

I have used 309L stainless mig for non strength welds on cast iron, but you can't beat nickel stick electrode for a strong, ductile and machinable weld.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.