Jon, I am for the first time experimenting with a vacuum pump on a relatively mild pulling engine. The runs amount to about 20 seconds down the track. On the dyno I was pulling around 9" of vacuum with the Moroso pump. It made for about 10-11 horse and was only loosing about 3-4 lbs oil pressure @ 8000. with vacuum pump it is carrying 70#. This is a stock block with a restrictor in the crossover to the left galley. The pump pulls from the top left front of the valve cover. It really made no noticeable oil in the catch can on the dyno pulls however it is putting about 3 oz of oil in the catch can per track run. I'm running a modified H.V. truck pump
Is this acceptable? Obviously we'll have to keep a watchful eye on it.
Thanks, Bret
Is this acceptable? Obviously we'll have to keep a watchful eye on it.
Thanks, Bret