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Adjusting BLM's with 7749 conversion

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Old Aug 3, 2004 | 10:07 AM
  #1  
89 Pollo's Avatar
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From: Omaha, NE. USA
Car: 89 Formula
Engine: 355
Transmission: 700R4
Adjusting BLM's with 7749 conversion

I have completed my 7749 conversion and am running a stock Syclone Bin with the necessary adjustments made to run my 89 Formula. The car runs great everywhere including idle. I have an OTC 4000e scanner and am noticing some high, 144-148 blms everywhere but idle and I want to bring them down to a more acceptable range.

I am taking Grumpy's advice and am taking good notes. With the scanner, I can create a customized view of 8 ecm parameters. I have created a spreadsheet that I can populate with these numbers. My question is, what parameters will I want to document to be able to go into my bin and adjust the appropriate tables? I am pretty sure I want to adjust my VE vs MAP vs RPM table to start. I currently have outside temp, RPM, engine temp, BLM, MAP, and integrator. Do you have any add/remove suggestions?

thank you,
Mark
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Old Aug 8, 2004 | 11:25 PM
  #2  
YenkoZ28's Avatar
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Car: 1991 Z28
Engine: 305 TPI under 14 psi
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Axle/Gears: Moser 12 bolt 3.08 gears
Don't forget tps %, so you know which ve table to change.
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Old Aug 9, 2004 | 06:52 AM
  #3  
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From: In reality
Car: An Ol Buick
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Re: Adjusting BLM's with 7749 conversion

Originally posted by 89 Pollo
I am pretty sure I want to adjust my VE vs MAP vs RPM table to start. I currently have outside temp, RPM, engine temp, BLM, MAP, and integrator. Do you have any add/remove suggestions?
K/Pa or engine vac.
If your scanner, doesn't data log, being able to data log makes life even easier.
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Old Aug 9, 2004 | 07:10 AM
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Balael6's Avatar
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Car: 1988 Formula
Engine: Twin Turbo .60/.63 305
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If you're a little rich everywhere, have you changed the bpc vs. egr in the code to reflect your running approximately 32-33 lb/hr injectors from them being Ford 30's? THat might help a bit.

pj
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Old Aug 9, 2004 | 10:17 AM
  #5  
FireBird88's Avatar
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Originally posted by Balael6
If you're a little rich everywhere, have you changed the bpc vs. egr in the code to reflect your running approximately 32-33 lb/hr injectors from them being Ford 30's? THat might help a bit.

pj
if your running windows XP and have .NET installed. i made a BPC Vs. EGR calc. i posted it a few post down, if the link dont work. its on Moates site.
the file name is "7749 BPC Calc.zip"
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Old Sep 28, 2004 | 01:45 PM
  #6  
Dominic Sorresso's Avatar
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From: Bartlett, IL
Car: 92 ZR-1
Engine: LT-5
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Axle/Gears: SuperDana 44 4.10
89Pollo,

A recommendation from Bruce that I would also suggest is to disable the EGR operation while your tuning. You'll find that it confounds your VE table by diluting the mixture
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