Installing some new injectors and wanted to double check some timing values with you guys.

 

Setup is in the title, current timing values for the tune I’ll use are...

 

max load timing offset - 2*

low psi timing reduct - 5*

timing reduct scaling - 50%

light throttle timing adv - 2*

light throttle load limit - 30%

 

Basically my starting fuel needed to be around 85 then taper down to 72 by 4-5psi then start it’s climb back up to get the low tps stumble out, but that caused the truck to have haze/smoke at idle. Even with starting fuel at 68 it haze/smokes at idle but not quite as bad. Tried using valet to move around the percentage a bit which got me to my starting mark but there’s no way I can start at 85 @ 0psi and have a drive able truck with this setup unless you know some tricks?

 

It was to the point where you couldnt see the smoke coming out of the exhaust but there was definitely smoke lol. 

 

Rolling on the throttle obviously creates some puffs or trails of black but it cleans up fairly quick. 

Edited June 12, 20186 yr by notlimah

Idle smoke is all oem fueling.  the quad does not adjust idle state fueling as the ecm just adds more fuel as fast as we pull it.  your tune takes over once rpm come above 1000 rpm and tpm is > 0

Ok so the smoke at idle I’m getting is just a result of huge injectors on stock turbo along with OEM fueling?

smoke at idle is injectors alone.  turbo doesnt matter and oem fueling does a good job of only commanding enough fuel for idle.

Ok so should the excess ‘smoke’ be a concern or just comes with the territory?

define excess

Well sorta hit or miss now lol.

 

The other day sitting at idle I could see light smoke coming by the passenger side door, being blown from the exhaust. 

 

Today, I saw nothing. 

 

Its definitely not visible leaving the exhaust tip, but if you were sitting in traffic it’d be enough to catch your attention if you could see it lol. Sorry it’s herd to explain.

That's pretty normal for those size injectors.

Kewl. That’s good to hear. Wasn’t sure so glad it’s normal. I suppose I’d see the same with a larger turbo as well right? Given that the quad isn’t doing anything at idle?

 

Also, any reason why sometimes the haze is more visible then others?

ambient temps / humidity etc

 

Turbo isn't involved as the  engine is near idle.  

Man I want to get 7x12 now if you can manage it with stock hx35 I'm sure 62/67/12 should be a lot better even without quad, we'll maybe not on take offs. I was thinking about getting 7x10 7x11 but ... 

Did you try running it on level 0 which should be factory with boost fooling only? If not can you try it and see how bad the smoke is on take off and when you get going. I'm curious....

8 minutes ago, Dieselfuture said:

Man I want to get 7x12 now if you can manage it with stock hx35 I'm sure 62/67/12 should be a lot better even without quad, we'll maybe not on take offs. I was thinking about getting 7x10 7x11 but ... 

Did you try running it on level 0 which should be factory with boost fooling only? If not can you try it and see how bad the smoke is on take off and when you get going. I'm curious....

 

Yea man, I’ll try it out on the way home tomorrow, I’ll try and grab some video if I can too.

@Dieselfuture Well tried it on 0 and it definitely smokes more then with the quad. Not a HUGE difference but notable enough. I could’ve driven it fairly smoke free. Any time you stab at the throttle it’s definitely smokey. I imagine your turbo would be really nice with 7x.012’s. I plan on upgraded to a 62/68/12 eventually.

What did you have your pop set to when you got them, sounds like anything over 330 is not a good idea. I mainly want to set it higher than normal just so they last longer.

325

So something I've noticed is when the truck is still cold and or warming and driving, I can get into some situations where it seems like it's surging a bit when in the lower-ish rpms with converter locked. Maybe something to do with timing? I'll have to double check the coolant temp to see if the quad is even taking over the timing when it's doing it, but would that make sense?