DAP 50hp injectors, SAC or VCO?

[NIsaacs]

Looking to replace my 20 year old 50hp Bully Dogs. Getting the blue/rich idle haze, plus they have always been smoky. I understand I need the 145* spray pattern for my '91.5 intercooled truck.

 

Looking at these with new Bosch bodies:

 

https://www.dieselautopower.com/dap-brand-new-performance-injector-5x0-012-vco-145-up-to-50hp-15293

 

https://www.dieselautopower.com/dap-brand-new-performance-injector-5x0-012-sac-145-up-to-50hp-15297

 

I would like to stay in the 50 hp range, it seems to do really well at this level. I have no EGT's or coolant issues at all, just too much smoke. I have a rebuild kit on order for my '01 HX35W, it is going on also.  It dyno's 260hp/700tq now.

[Mopar1973Man]

Most of us prefer the VCO's.

[NIsaacs]

21 hours ago, Mopar1973Man said:

Most of us prefer the VCO's.

 

What about the 7x10's @ 55hp? What is the preference for more or less spray holes/size?

 

DAP has way too many choices, Lol

[Mopar1973Man]

More holes typically will have a better atomization, better burn, cleaner for street application. 

 

7 x 0.010 is what I'm running but it works out to 150 HP injectors on 24 valve trucks.

Edited July 28, 2020 by Mopar1973Man

[NIsaacs]

I talked to DAP and they recommended these, so that what I ordered.

 

https://www.dieselautopower.com/dap-brand-new-performance-injector-5x0-012-vco-145-up-to-50hp-15293

Edited July 28, 2020 by NIsaacs

[Mopar1973Man]

Should be a nice bump in power. 

[NIsaacs]

Rebuilt the HX35 and installed it in the '91. It was a direct bolt in. I did need to move the exhaust pipe/brake back 1 inch, the '91 exhaust manifold had studs to mount the turbo. The HX35 had two studs, so I removed them and 2 from the '91 manifold and used smaller bolts clear through, threads and all. The oil lines were exact as was the compressor outlet. The shaft was worn slightly so it didn't tighten up as much as I would have liked. 

 

Shake down run with empty truck to town and back, it spools quicker but max boost was the same, 26psi. The big oem air filter housing muffles the intake so no cool intake spool up whine. The exhaust might have a slightly louder idle whistle.

 

 

Edited July 29, 2020 by NIsaacs
pictures

[NIsaacs]

Wow, nice bump in power with the new injectors. I didn't expect that. Boost jumps to 28 psi now, still can get some smoke but it is grey now and not soot black. Idle is haze free.

 

Old injectors have Brasil KDAL 59p5 18208, 245 bar on the bodies and 4 hole nozzles. The new ones had really thin washers v/s old, they were thick. I would say about .010 v/s .030

 

After some research, the old injectors might be 4x13, 155* spray pattern and rated 50hp P-pump or 30hp VE pump. That might explain the bump in power and the smoke they had.

 

 

Edited August 2, 2020 by NIsaacs
add info