oil safety valve welded closed

[puffinator]

What would be the purpose of welding closed the crankcase port of the oil safety valve circuit? This is a race engine built by Rothsport Racing.

[porterdog]

In your shoes I'd email them direct and ask.

[304065]

do you mean the oil bypass mod? Can you post a photo?

[puffinator]

Here is a picture of the closed off safety valve opening into crankcase

[Flat6pac]

I just had one of the flappers in an SC engine, the flapper fell off as I was looking at it.
Tapped it and plugged it from the plug behind the flywheel because no other 3.0 that I had here had the flapper or anything like it.
Bruce

[cgarr]

I guess welding is ok, usually just tap and plug it for the bypass: What motor is that case?

[304065]

Originally Posted by puffinator

Here is a picture of the closed off safety valve opening into crankcase

That is the "oil bypass mod" - it dates from the 1970s- rather than having excess oil pressure vent into the case, an oblique passage is drilled from the oil pressure outlet side into the inlet, which lowers the level in the sump, reducing windage, and allowing the pressure section of the pump to be larger relative to the scavenge section.

As Craig says (and he does this mod) one typically uses a plug, either interference fit or threaded in, to block the port, but there's nothing wrong with welding it, albeit more complicated.

[puffinator]

It is a 914-6 case.