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cjsracing
07-15-2010, 10:51 AM
Mainly wanting your opinions here. If you are running a dry sump and pulling a vacuum what pump are you using 4 satge of 5 stage?

Thanks

lovinlatemodels
07-15-2010, 03:10 PM
4 stage if your pulling 2 out of the pan and 1 from the intake. And a 5 stage if 2 from the pan 1 from the lifter valley and 1 from the intake for vacum.

cjsracing
07-15-2010, 03:32 PM
4 stage if your pulling 2 out of the pan and 1 from the intake. And a 5 stage if 2 from the pan 1 from the lifter valley and 1 from the intake for vacum.

I know that, I am trying to find out if more people are using a 4 stage or a 5 stage and vice versa.

fast_crew
07-15-2010, 04:52 PM
Usually a 5 stage with 1 being alittle bigger ( 1-3/8 or so) is needed with an aluminum block, as there is alittle more blow-bye due to cyl. walls moving and flexing. This is where thin rings and gas ports can make a big difference in blow-bye.

fast_crew
07-15-2010, 04:57 PM
4 stage if your pulling 2 out of the pan and 1 from the intake. And a 5 stage if 2 from the pan 1 from the lifter valley and 1 from the intake for vacum.

NONE of the stages go to the intake for vacuum. The pump stages make the vacuum, by pulling more air and oil out then what is put in by blow bye and oiling. The entire engine must be sealed very well, no breathers, no oil pan leaks, no lifter valley rails leaking, etc... If so, your sucking in dirt and not making much in the terms of vacuum.

shocker33
07-15-2010, 05:23 PM
Curt your motor is set up for a 5 stage pump. If you're in the market for a new pump either call Bill or get ahold of Ed Wullf of Wullf pumps and get ya a five stage. Bill switched us when we started buying motors there and haven't looked back.....

cjsracing
07-16-2010, 08:14 AM
Thanks Nick I'll look into that.

hardracer32
07-16-2010, 12:08 PM
I talked to the guys at Custom Race Engines and they told me that as a rule, especially with the big open engines that 5 stage is the way to go.

As far as where the lines come and go, on a 4 stage you are pulling 2 out of the pan and one from the lifter valley, on a 5 stage you just add one to the pan.

I've never run a 5 stage but if my memory serves me that's what the guy at Custom told me, I asked him because I was wondering the same thing myself.

sj valley dave
07-22-2010, 02:46 PM
We run a 5 stage Wulff and yes, 3 pull from the pan, 1 pulls from the lifter valley...