Quote:
Originally Posted by DAT335
So yesterday I finally got my forge pistons from pure performance motorsports after a 10 week wait. The product is awesome but are hopeless to keep to a time frame and ignore the customer if trying to find out what is going on with your order. Never again will I deal with them. I got them only to find out that the pistons are 84.5mm dimensions when the stock pistons are 83.92mm so now I have to get the block bored out to the correct size which is another couple of days and a extra $440 for the block. Compression should be slightly higher which should be good. So hopefully things will be smooth sailing from here on out.
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This is industry standard practice. Aftermarket pistons generally start at 0.5mm oversized then you bore the cylinders to get the perfect clearance. It's very rare to try and build pistons to have perfect clearances for a specific set of bores.