NPT is a tapered thread (National Pipe Thread Tapered Thread), used in the US. The fitting will "crush" into the thread to seal, and you'll need to use PTFE tape to make sure it doesn't leak, not ideal if you ever need to take the fitting out as you'll probably get bits of ptfe tape falling into your sump. A 3/8 NPT thread has 18 tpi (turns per inch)
BSP (British Standard Pipe Parallel) is not tapered (BSPT is tapered). A 3/8 bsp fitting is 19 turns per inch.
Originally Posted by
BRAMMER
I have a -10 fitting on the separator fitted with a -10 to -8 reducer down to the block - this is where i need help what is the thread size of the hole in the block turbo side?
The thread in the block is not tapered, which is why i said it was 3/8 bsp.
Food for thought: The pinto engine was built by Ford Europe, not Ford USA...