[petehoovie]

Originally Posted by Bruce_MO

I have been following the recent thread about 2x2’s on an 8BA with interest. My ‘53 Ranch Wagon has a EAB motor with Offy heads and Offy intake with two 94’s. Also has a Mallory distributor. It has always run rich and had any manner of flat spots when accelerating. I have tried several jet/PV combinations thru the years. Per Charlie-NY, my latest set-up is I’ve blanked off the PV’s and am running jets of a size he recommended but I can recall. It runs “fair” after about 10 minutes to get thoroughly warmed up, but runs really badly until then. So I’m going back to one of the options described in the original thread… 49 jets and either 5.5 or 4.5 PV’s. Below is a photo of the assortment of PV’s I’ve used. One thing is strange… the 5.5 and 4.5 PV’s on the top and middle row are very stiff and seem to “snap” open and closed. There is no continuous motion i.e., start to open at the initial vacuum value, and then gradually open to 100%. They would just pop open and dump fuel. The other PV’s at the bottom of the photo labeled Daytona have a smooth and continuous opening action, and they seem to be much easier to open than the other PV’s. The pressure to initiate opening is far less.
So… what’s the proper opening action of a PV? Closed, then snap open? Or gradually open? Anybody have a recommendation for the best choice and a p/n? And I will recheck everything for vac leaks and fuel leaks. Thanks