Quote:
Originally Posted by Ian Hill
...and how about on a stocker. i don't know about NHRA, but in IHRA we can not run header evac, is there anyway of hooking up the carburator metering block tube that creates vacuum throughout the rpm range to the pcv to create vacuum even at WOT.
Ian
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All you can do on stockers is intake vacume. If your ring seal is real good than you can use brake booster valves that seal when vacume diminishes and it will maintain nicely.. If ring seal is so so, use PCV valves as they don't seal as well and won't build as much pressure. The main thing here is you don't want any pressure in the crankcase as it will unload the rings and you will loose power, or blow oil out of every orfice that ain't up to the task. which leads me to another important step that you have to pay attention to... You can't have any leaks, you cant build vacumn in the crankcase if it don't seal!!! Test for leaks by slightly pressurizing the crankcase and listen, squirt with soapy water and seal them all up...