Nitro Dave's Nitrous Outlet

iTrader: (25)

Ok guys I need to pic your brain.What I need to know is what years used what mass air meter on the c5s and the Zo6s.I believe all the vettes use 85mm right? What was different about them.I have tried every where I can think of and most people have not been able to help.
Thanks
Dave

Nitro Dave's Nitrous Outlet

iTrader: (25)

Come on guys all these knowledgeable people and no one can help me?

jimmyblue

iTrader: (11)

'01 and later were 85mm. '02 and later Z06 is descreened.
The Z06 seems to be a nonstandard as far as Delphi's
list of MAF products is concerned (I waded through the
whole thing). Almost all current GM V-8s use the same
85mm screened MAF. I posted that info in the External
Engine section not that long ago.

https://ls1tech.com/forums/showthrea...ght=delphi+maf

Nitro Dave's Nitrous Outlet

iTrader: (25)

Thank you very much for your help.Would you happen to know about 98-2000.
Also would the non screen maff work on the cars that had screened maffs.Was that the only difference?
Dave

jimmyblue

iTrader: (11)

I believe the 'Vettes through 2000 used the
aluminum-body MAF like the F-body. There is
a howto (c5howto.com?) on swapping in a
5-pin, 85mm MAF that includes MAF table
info. But I don't have specific early-C5 MAF
info, only "stuff gleaned from context".

Have seen some stuff about 'Vettes being more
sensitive to descreening, believe this is due to
the funny "air bridge" biasing the airstream at
higher flows. Slight MAF table differences are
shown in that howto, presumably to account for
the inlet tract effects (similarly, slight table diffs
for trucks vs 'Vettes vs other makes w/ screened
MAFs that are all (evidently) the same base Delphi
unit; just shaving tables to get that last percent
of accuracy.

Team ZR-1

97-00 had 75 mm (750 CFM) screened MAF and will work if screen is taken out but tuning of PCM is needed else without the screen in there can be some surging.