Jump to content
Sign in to follow this  
hexdmy

tps and MAP accel fueling together

Recommended Posts

I've noticed on some of the cars that I've tuned with G4's that it would be good to have both accel fueling strategies available at the same time. Primarily I use tps based accel fueling, but on some turbo engines, you can get a bit of leaness when the turbo spools, and tuning with map based accel fueling alone is not much of an option on engines with decent sized cams. 

Share this post


Link to post
Share on other sites

Bumping this topic... I'm surprised no one else has interest in this. OEM systems I have worked with do this, and it makes sense. At low throttle openings, a change of throttle angle is a better trigger for transient fueling than map for engines that have low / noisy idle vacuum. However, at steady throttle angles, on a turbo engine, as the boost builds, there can be a need for additional fueling, otherwise you get a lean spike. I've noticed this when tuning steady state and then doing transient sweeps, if you tune to the sweep, you get a inverse V in your fuel map. 

Certainly this is not reinventing the wheel, just doing what the OEM's have already been doing for many years, and for good reason. 

 

 

Share this post


Link to post
Share on other sites

Yes thats a good suggestion. Even better would be a propper fuel film modell or at least some kind of short and long term acceleration enrichment.

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.

Loading...
Sign in to follow this  

×
×
  • Create New...