75hp DDP injectors- Why so dirty??

[Chrisd91]

I woulda gone bigger haha...Oh wait..I did! :doh:

6x.013 + SOVP44 + compounds = almost as good as sex!

Make sure to put a little tabasco in that to be safe hahaha

 

[Chrisd91]

Found a rather noisy boost leak, clamp wasn't tight.
Still Oralin Cole :doh: for the top half of the skinny pedal.
Cleans up to 950 deg EGTs now LOL.

Mach4s on order.

Still think you could use a larger injector

 

[jgsturbo]

Weak.

+50whp w/ 75HP injectors and S475.
43psi 1130 deg.
DROPS LIKE A ROCK @2500, de-fueling? Hot-unlock might help.

 

[jlbayes]

needs more injector!

 

[BRE]

My 100 horse DDP's are filthy in my opinion. Not near as much air though.

 

[jgsturbo]

Really didn't smoke much on the dyno but the rolls spun up real quick compared to say throttling it up a gravel hill , so much haze ... I think my neighbor was a little pissed I left a huge cloud in his driveway no trailer on.

During the run there was NO smoke at all , clean as whistle.

 

[jlbayes]

how much boost? it might not have been loaded hard enough.

 

[Headcase98002]

I think you should get a hold of Weston.

 

[jgsturbo]

43psi 1130 deg.

That's max boost on the road too. My vehicle setting where 7900lbs and 27hp@50mph (24 is std).

 

[jgsturbo]

I think you should get a hold of Weston.

I need to keep this truck operational so it stops me from sending them off as I don't have any other injectors.

 

[jigabop]

go buy some cheap bosch injectors...

 

[Ghostman]

I need to keep this truck operational so it stops me from sending them off as I don't have any other injectors.

PM me, I have a spare set of oem I will help you out with.

 

[jgsturbo]

I already ordered some Mach 4s as they are definitely the cleanest.
Biting the bullet and taking it as a lesson.

 

[angelic0-]

my truck is a 12valve.... but i have a bigger injector with my setup and they are dirty but not intolerable... 1300°F towing, never tried bury-ing it while towing though....

Have seen it touch 1400°F unloaded while racing...

 

[jgsturbo]

Wondering if my juice might have a boost de-fuel setup... something is wrong once it hits 42-43psi, no way we should just be fully dropping power. On the road it feels like somebody shuts the motor off for a sec.
Drove it today, nothing like taking off nice and slow then seeing a huge cloud of haze...
But can't resist a drive or two, trucks been down since jan.

 

[jgsturbo]

Yep, I'm retarded.... RE-Dyno time.

 

[jgsturbo]

Well I guess I can't complain about these injectors producing...

But still dirty, a bunch of ash besides the dyno.

 

[jgsturbo]

Now after some miles I've seen as high as 56psi, same EGTs and my lift pump pressure is dipping to 6-7psi.
The lift pump pressure isn't good but its a sign that these injectors are moving more fuel than they where. Maybe I finally blew out some plugged holes?

Smoke isn't as bad but still would like better.

 

[Ghostman]

Nice numbers, but I would get the fuel pump replaced.

 

[jgsturbo]

Definitely... planning on before I attempt to swap for the mach4s.
For now I'll just keep the box turned down, the current lift pump (1.5 year old factory) was keeping up on the 420HP run.