Quote:
Originally Posted by scheides
20w50 is run by a lot of dsm/evo guys, I kinda doubt that would hurt anything.
You should be able to tell by the part number on the pistons (or the box) that they are standard or overbore-sized pistons. Always doublecheck your work.
That being said I've made some pretty big mistakes in my time so don't let it get you down! Just fix it and move on, that's all you can do!
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To echo this post:
Agreed with the oil weight. In a high stress / race environment use oil that best matches your most extreme operating temperature. Too thin and you'll probably get good at spinning rod bearings.
That being said, switching to a thicker oil caused sufficient oil pressure to blow smoke on my turbo (no balance shafts). I am porting my oil filter housing to compensate.
The best way to get a block machined is to have the pistons in hand then give them to the machinist along with your PWC. I've seen ' 020 over' off by enough to screw up my engine builds by having the block bored before I had the pistons.
The more mistakes you make, the more experience you gain. Rinse and repeat for best results over the course of a lifetime.
