Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

How to lower BLMs?

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Old Aug 12, 2002 | 09:49 PM
  #1  
Ed_H's Avatar
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From: Homer Glen, IL
Angry How to lower BLMs?

What's the best way to reduce my BLMs at part throttle / cruise? I'm seeing ~130-134 on both sides and am targeting a 124-128. I have no detectable exhaust or vacuum leaks.

Should I reduce the injector size, or increase the MAF table values? I know both will work, but I need input about the 'best' option if there is one. Thanks in advance.
Old Aug 13, 2002 | 10:01 AM
  #2  
Hal Fisher's Avatar
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From: San Jose, CA
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Either of those may help. I would try adjusting down the injector size like you stated first.

Hal

Old Aug 14, 2002 | 03:04 PM
  #3  
Dr.Mudge's Avatar
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If you play with the injector size you will change the BLMs for the entire RPM range that you will see, so if you were fine in other areas like WOT then you now have to fix that as well.

Richen it up in the RPM ranges that are showing above 128...
Old Aug 14, 2002 | 05:48 PM
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gb95zconv's Avatar
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From: Woodstock,Georgia
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<font face="Verdana, Arial" size="2">Originally posted by Ed_H:
[B]What's the best way to reduce my BLMs at part throttle / cruise? I'm seeing ~130-134 on both sides and am targeting a 124-128B]</font>
I wouldnt worry about it if your that close to 128.....Sure you can change the inj constant and drop the BLMs down but you will effect other cells at the same time. Whats the difference anyway in the pcm correcting up a small percentage or down a small percentage...its still correcting as it well should. If you worried about the pcm holding on to those 130+ values when you go WOT just use the BLM Locker program to lock the BLMs at 128 at WOT. Quit splittn hairs and go have some fun IMO.




------------------
Greg
95 Z28 conv M6
Georgia F-Body Association

Stage 1 heads, 1.6rr, Meziere WP
lt4 hot cam,lt4 timing chain kit,52mm TB,
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NX 150 progressive,
Self-tuned via Tunercat
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