Fuel Injection & Tuning DiabloSport | HyperTech | TwEECer | SuperChips | HP Tuners

MAF calibration question?

Old 06-21-2006, 09:43 AM
  #1  
Staging Lane
Thread Starter
 
Join Date: Jan 2003
Location: South of Boston, Ma
Posts: 93
Default MAF calibration question?

Why do the Ford MAFs have to be recalibrated for bigger injectors, but GM MAFs don't?
JRL96TA is offline  
Old 06-28-2006, 09:18 PM
  #2  
TECH Fanatic
iTrader: (18)
 
iamsickofitall's Avatar
 
Join Date: Oct 2004
Location: Clifton, NJ
Posts: 1,091
Default

i have the same question...bump
iamsickofitall is offline  
Old 06-29-2006, 09:52 AM
  #3  
TECH Senior Member
iTrader: (7)
 
Brains's Avatar
 
Join Date: Jan 2002
Location: Katy, TX
Posts: 12,763
Default

Its not really "calibrating" the MAF as much as its NOT calibrating the PCM. You're basically accomplishing the same thing, without having to dig into the PCM code. With the EEC-IV, that means not having to tear apart your kick panel, and install a module into the J3 diagnostic port of the PCM.

For all intents and purposes, you're merely tricking the PCM into thinking less air is entering the engine. Thus, the PCM commands shorter pulse widths to the injectors. The "right" way to do it would be to alter the injector flow rate table in the PCM, just like GM guys do it.
Brains is offline  
Old 06-29-2006, 05:41 PM
  #4  
TECH Fanatic
iTrader: (18)
 
iamsickofitall's Avatar
 
Join Date: Oct 2004
Location: Clifton, NJ
Posts: 1,091
Default

that's what i figured...my brother has a mustang and keeps telling me he needs to calibrate the MAF if i were to give him my SVO 30#ers. i told him he should probably do it with a chip at the PCM because i thought this way was ghetto...like the 85mm MAF's on LS1's - it just makes PCM tuning a bitch later

Last edited by iamsickofitall; 06-29-2006 at 05:57 PM.
iamsickofitall is offline  
Old 06-29-2006, 05:43 PM
  #5  
Staging Lane
Thread Starter
 
Join Date: Jan 2003
Location: South of Boston, Ma
Posts: 93
Default

Thanks for the info guys. That's exactly what I thought they were doing. Just wanted to make sure. If I do any serious mods like that, I'll just pick up the SCT Pro setup.
JRL96TA is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
roach4047
Internal Engine
0
05-08-2007 01:08 AM
Blackhawk777
External Engine
2
01-18-2007 06:51 PM
00BadassTA
External Engine
2
06-16-2006 10:07 PM
3.8SFITURBO
Website Support
2
05-16-2006 06:06 AM


Thread Tools
Search this Thread
Quick Reply: MAF calibration question?


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.