Wrenchin’ Tip for 10-14-10 Back Cut your Intake Valveshttp://timsweet.wordpress.com/2010/10/14/wrenchin-tip-for-10-14-10-back-cut-your-intake-valves
Wrenchin’ Tip for 10-14-10 Back Cut your Intake Valves
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October 14, 2010
If you are work on your older cars engine, there are a good many tricks that you can use save a couple bucks and gain a little horsepower.
This one is an oldie but a good.
Have your intake valves back cut, you’ll get a similar boost as if you use high lift rocker arms or cam.
The procedure is best done by a qualified machinist. So while you have your engine apart and laying all around our garage on pieces of cardboard (come…you know that’s what happens!!!) have him take a little off the port side of your intake valves. This creates the same effect as an earlier opening a later closing action like just a like a the addition of a an upgrade cam. The lighter valve means less spring pressure is required to control the valve at higher rmps.
A 30 degree cut is what they do on vortex engines.
The backcut is at the edge of the normal valve cut.
Thanks for reading.