85mm MAF Question
01-12-2012, 06:37 AM
#2
01-12-2012, 09:31 AM
#3
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The thing about 85mm MAFs is, they get to max freq at
lower air mass than the stock 75mm (459g/sec @ 12kHz)
but earlier PCMs don't run all the way out to 12kHz in the
MAF table - or so I recall. So your air mass is likelier to
hit a limit value early, in effect.
lower air mass than the stock 75mm (459g/sec @ 12kHz)
but earlier PCMs don't run all the way out to 12kHz in the
MAF table - or so I recall. So your air mass is likelier to
hit a limit value early, in effect.
01-13-2012, 11:59 AM
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This area seems likely to be able to answer my question so i'm going to throw it out there.....I have a 2001 Trans am harness (donor; in a 1968 firebird) connecting to an LS2 Magnacharger that fits a 2006 GTO....questions is this - I need to purchase a MAF housing ....will I need some sort of adapter to connect the 2001 ECM to the 2006 MAF??? Thanks in advance for any help!!
01-13-2012, 04:51 PM
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The connectors are different at the MAF, and you may
want to use the in-MAF IAT which accounts for the extra
two pins, or not. Casper's sells adaptors and pigtails for
soldering, or you can cut one off at the boneyard. The
calibrations differ, that's a trivial tuning thing. But you
want an idea of whether you are going to max out the
MAF g/sec, 75mm limits at 511g/sec while 85mm clip at
about 459g/sec.
Now if you intend to run boosted you really want more
than the 1-bar MAP, and all the 2-bar OSes I think are
speed density only so a 3-1/2" piece of pipe might do
as well.
want to use the in-MAF IAT which accounts for the extra
two pins, or not. Casper's sells adaptors and pigtails for
soldering, or you can cut one off at the boneyard. The
calibrations differ, that's a trivial tuning thing. But you
want an idea of whether you are going to max out the
MAF g/sec, 75mm limits at 511g/sec while 85mm clip at
about 459g/sec.
Now if you intend to run boosted you really want more
than the 1-bar MAP, and all the 2-bar OSes I think are
speed density only so a 3-1/2" piece of pipe might do
as well.
