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Message: [QUOTE="907DAVE, post: 320932, member: 672"] He was kidding. You can only get them down to 1.750ish, any more you are going to get coil bind. Here's a chart for everyone to look at: [URL="http://www.compcams.com/technical/valvespringchart/216-06.pdf"]http://www.compcams.com/technical/valvespringchart/216-06.pdf[/URL] If you look at the chart when running the spring right to the limit - seat pressure is only 134lbs. Now take the valve size and multiply it by boost or backpressure to see when the valve will lift WITHOUT the influence of a camshaft. 1.85ish (cannot remember exact size) X 70PSI = valve to piston contact on a motor that is not even running. That PSI might seem a bit high for your average setup, but I know there are many people pushing stock turbos to that range of backpressure. Honesty, I could care less what everyone else is doing, I would just like others to consider that 910's might not be the best option for anything other than a stock application. [/QUOTE]

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