X2. You can actually remove the beginnings of a crack and not even know it by removing stress risers.
Is it a precision job? Obviously you cant just hack at it like an idiot, but can you just be freehand on the same plane or does it need to be more precise?
I am gearing up to rebuild a 12 Valve from bare block up so I might as well do this while I am in there if it is possible for me to do.
Block has 247,000 on it so anything I can do to keep it living its new life, I am in.
I used a 4.5" hand-held angle-grinder, a pneumatic die-grinder with a small diameter burr, the nose of a belt-sander, and open-mesh sanding-cloth.Is it a precision job? Obviously you cant just hack at it like an idiot, but can you just be freehand on the same plane or does it need to be more precise?
I used a 4.5" hand-held angle-grinder, a pneumatic die-grinder with a small diameter burr, the nose of a belt-sander, and open-mesh sanding-cloth.
The primary goal being to not hit the danged main-bearing machined surfaces.
- Cut running the length of the object. Not across it (cutting across introduces potential stress-risers). Round any and all sharp corners.
- Safety-glasses and a mask are pretty cool.
Yes. Aluminum with the slightly oversize bore.Are you using metal oil squirters?
Nope. All that checked out good. Besides, in this case, you're only going 20ft/lbs over stock.Did you have to line bore your block to run the main studs?
I wouldnt unless you have access to a scale to make sure they are all equal, and then, what benefit? Has anyone else BTDT?I'm wrestling with, at least cutting off the bulk of the connecting-rod's, main-bearing cap's balancing pad for the reduction of reciprocating mass.
Thoughts?
I have all that required to do the work including re-balancing the rods.I wouldnt unless you have access to a scale to make sure they are all equal, and then, what benefit? Has anyone else BTDT?
I went back to re-read what he had done when I assembled my engine. Seems like a dirt-bike accident did him in.What was the before and after measured weight of the con rods?
I’ve always known a phrase, “blue print, polish, and balance an engine.”
Blueprint meaning measurements of necessary components.
Polish meaning polishing of rotating components for less drag and rotating weight.
Balance for weighing necessary components to achieve a perfectly balanced rotating assembly.
Your thread reminds me of the feller who machined off most of the counter wright in his 12v crankshaft. Somewhere there is a thread about the topic. He followed through and ran the crank despite the skeptical feed back.