It only has .270 plungers. I used the ag governor,which is causing some surging . Got the governor working better,and then promptly snapped the little db2 cam pin. Thought the pump seized,from too high charge psi,but its ok. I have everything I need to convert to the db4 pin. I also have...
Got this pump on and running,I tried it once before and didin't realize that the drive slot was 1/4 turn off. It sure puts out some fuel. My clutch slips in 4th gear,a good sign.
I would have to look at one again,kinda thinking there's a bolt on either side. You would have to drill it,and braze a fitting on it. There's also a threaded plug near the top,that is probably charge psi,I will have to check.
The DS4 has dual feed to the plungers . Way ahead of the DB2 in plunger fill. The DB2 restricts fuel to the plungers,for throttle control. The DS4 dumps fuel away,after the plungers are already full and pumping,for throttle control.
I epoxied the head and block ports,and simply enlarged the lower rear steam hole. I had to flip the fire rings,because they were Felpro,bottom side is to narrow for orings. I also torqued to 150 ft lbs,so far its working fine.
I ran a single hx 52,it would light as early as 1800 rpms . Also ran a hx 55 that lit around 2500 rpms . When you have a lot of fuel the bigger turbos light real nice as a single.
I checked the Olds cup,the divider is inside,kinda forgot how it looked . I guess the injector is supposed to spray on it . I'm actually quiet satisfied with my power limiting na cups :D
One injector is randomly sticking. Loosen injector lines one at a time to find it,then take that injector apart. You will probably need a visegrips to pull the pintle out,polish it up real nice and reassemble.
I'm running one,I call it a nv3500, but its the earlier Getrag/Muncie. They are very underated,I ran one behind a built sbc 400,a 5.9 Cummins and now a turbo 6.2. Only one that broke was behind the Cummins,sheared the 5th gear on the counter shaft twice,last time the rear tires locked up at...
Works best with marines,stock 304 might work also. The long nozzles or any without a flat spotted pintle won't have the same results. In a way increasing pop psi makes the injector smaller,and it takes away the flooding affect under the turbo. I'm running these combined with small na precups...
The 6.2 I'm currently running continuously blows the gaskets at the end cyls,the deck is pitted some. So,as a last chance option I completely sealed of the water ports with epoxy . The front 2 aren't used anyhow,and simply relocated the rear 2 . I had some felpro gaskets that needed used...