Jump to content
  • Welcome To Mopar1973Man.Com

    We can see that your guest and been lurking about. When you register on the Mopar1973Man.Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Take the time right now and  REGISTER  on the Mopar1973Man.Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. 

Sign in to follow this  
blkruby

Looking for help on a daily drive tune

Recommended Posts

I’ve just got the truck running and still have the edge comp box installed and it is a smoky mess so I’m looking to get a daily tune that I can work off of. The mods to the truck are a 6.7 188/220cam 6x.018 injectors dragon flow pump and sxe480 and a sxe364.5 

Share this post


Link to post
Share on other sites

Use some of the tunes in the tune repository.  There aren't any tunes for that size injectors, but there are tunes for big injectors that you can work off of.

Share this post


Link to post
Share on other sites

@Me78569 @Quadzilla Powerso I've got a couple questions, First can you lower boost level fueling any more there 50%? and second question is once i set my daily tune anything under 10% throttle the truck will lope, once pass 10% it runs fine and it will idle fine this is only on lvls 2 and up lvl 1 it is fine 

Edited by blkruby

Share this post


Link to post
Share on other sites

Same thing,  the ecm see's rpms slightly drop as the quad alters fueling to bring it down.  the ecm then add's fuel to make up for it and the fight continues.   

 

this is normally limited to sub 1000 rpm area.  

Share this post


Link to post
Share on other sites

so is there and thing i can do in the tune to alleviate this? also is there and thing i can do in the tune to help with smoke other than the boost level fueling

Share this post


Link to post
Share on other sites

not really the ecm prevents us from doing much about it until rpms are up enough to keep the ecm from sending high priority messages.   

 

If you are already at %50 as a starting point you are pulling as much fuel as possible.  you can pull timing to try and help smoke, but I have not seen great results.  

 

you may have reached the limit of the mechanical injectors vs hole size and the ablity to inject fuel at low pressure.  how big are your injectors?

 

Edited by Me78569

Share this post


Link to post
Share on other sites

260 bar are going to make it EXTREMELY difficult to control smoke on that size injector.  you can try pulling a ton of timing, but I think you are at the limits of what your mechanical setup can do.  


Going from 350bar to 305 bar with my old 7 x .012's was like going from stock injectors to 7 x .010 injectors in terms of smoke increase.   

I also noticed significantly worse idle and off idle states with 305 bar vs 330 bar.  that is only my testing and we dont have enough data to say for sure.

Edited by Me78569

Share this post


Link to post
Share on other sites

i think the reasoning for low pop pressure is for timing on the dragon flow pump at the higher pop it could hydro lock the pump. but the truck idles great and climbs threw the rpm smoothly

Share this post


Link to post
Share on other sites

Dunno really what the reason for it was, the builder would have to answer that question.  My guess is it is related to power output as lower pop = more fuel for a given duration.   

 

You can try running around on lvl 1 as there is no low limit for valet mode.  Set it at %20 does it still smoke?    

 

Guessing your setup is going to mechanically limit your smoke control though.  

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  



×
×
  • Create New...