Posted By: Cab_Burge
Motor sealing tricks for making vacuum in the crankcase? - 02/28/20 07:22 PM
I'm having issues on my bracket motors (Two) getting above 5.0 inches of vacuum with a big GZ vacuum pump
The current motor is better than the one before it but not any where near 10+ inches, any things I should look for?
I bought the pump used several years ago and sent it back to GZ for repair or rebuilding as needed, they called yesterday and said it tested good
The current motor has a early Hamburger SS oil pan with the lower kick out in it with the drag link hole removed and covered up for more volume at a lower level. I put 11 quarts in it to get it on the tip of dip stick.
I'm sure it has a tiny pin hole in it some where as it will weep, seep, some oil onto the pan when it sits all winter, no weeping or seeping during the race season though
The current motor is better than the one before it but not any where near 10+ inches, any things I should look for?
I bought the pump used several years ago and sent it back to GZ for repair or rebuilding as needed, they called yesterday and said it tested good
The current motor has a early Hamburger SS oil pan with the lower kick out in it with the drag link hole removed and covered up for more volume at a lower level. I put 11 quarts in it to get it on the tip of dip stick.
I'm sure it has a tiny pin hole in it some where as it will weep, seep, some oil onto the pan when it sits all winter, no weeping or seeping during the race season though