Hello, I have been tuning my b16 turbo del sol with uberdata and a plx-m300 and I am having a problem. Right around 5000 the a/f ratio is about 12.3. My target is 11.8. My problem is that no matter what changes I make in uberdata, the ratio never changes. In all other rpms, I have no problem tuning, its just at around 5000, it stays at 12.3. Is there something I am doing wrong, any input will help, thanks alot.

 

how much fuel are you adding in that area? sometimes 1-5% wont make much of a difference since around 5000rpm is usually peak torque and requires the most amount of fuel.

try adding 10-15% of fuel or more and see if it makes a diffrence.......if not there might be a problem with your wideband o2 sensor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">since around 5000rpm is usually peak torque and requires the most amount of fuel..</TD></TR></TABLE>

I had the exact same problem using uber/plx. I found I had to add quite a bit in that area. (and I assumed it was because of that exact reason)

How much pressure are you seeing at 5000rpm??

 

I'm getting full boost by that point (7psi).

 

Are you datalogging to see what boost column it's actually reading? If you hit peak boost right at that rpm point, it may be be reading in a higher column right there, so you might not be adjusting the correct boost column.

 

Yes I am datalogging and correcting the right columns.

 

try richening the rows around 5000 as well. Uberdata interpolates between cells to find a fuel value.

 

What injectors are you using? They might be going static/maxing out.

 

I'm using dsm 450cc injectors, i dont think the duty cycle is anywhere near 100% at the rpm, ill check it when i get home today.