Speed density and MAF
09-21-2000, 08:52 AM
#1
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Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Speed density and MAF
I want to change my MAF to MAP soon. But I want to get a new wiring harness altogether. I looked at Speed an Performance but they are really expensive. Does anyone else make new harnesses BESIDES Painless? Also will my 88 computer work with MAP if I get a custom prom or do I have to get a new computer? Is the knock sensor different betwee years? I know it is different between 350 and 305.
James
James
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If the women don't find you handsome they should at least find you handy
James
James
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If the women don't find you handsome they should at least find you handy
09-21-2000, 08:59 AM
#3
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Car: 1982 Z28
Engine: LS1
Transmission: T56
TPIS and Howell can modify your existing MAF harness to work w/ the MAP ECM and sensors for less $ than buying a whole new one. TPIS is www.tpis.com, Howell is www.howell-efi.com if you're interested.
You'll need to change ECMs and CALPAKs, the 1227165 ECM your MAF system uses won't work. You need a 1227730 ECM (90-92 F-body or 87-88 Beretta) and a CALPAK from a 90-92 F-body.
Check http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/ for more info on swapping MAF->MAP.
-Kevin
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1982 Z-28
See http://www.mycar.net/mafb/registry/detail.cfm?id=276 for details
You'll need to change ECMs and CALPAKs, the 1227165 ECM your MAF system uses won't work. You need a 1227730 ECM (90-92 F-body or 87-88 Beretta) and a CALPAK from a 90-92 F-body.
Check http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/ for more info on swapping MAF->MAP.
-Kevin
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1982 Z-28
See http://www.mycar.net/mafb/registry/detail.cfm?id=276 for details
09-21-2000, 11:16 AM
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Depending on the cost you may want to look at a replacement system. I just bought the Haltech unit and it only took the aditon of three wires at the computer. It is a MAP system but you can tune it (that's great). You also have the option of putting the MAF back on and plugging up the old computer.
I think the total package cost me $600.
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Hank
87'IROC Z28
Hanks 87 IROC
I think the total package cost me $600.
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Hank
87'IROC Z28
Hanks 87 IROC
09-22-2000, 12:07 AM
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WHY??WHY??WHY??would you do such a thing
the MAF system is much better at accepting MODs
TPIS has donE tests, and they are posted in their INSIDERS HINTS BOOK, THE MORE MODS YOU DO THE MORE HORSES YOU GET FROM THE MAF SYSTEM
IF IT IS POSSIBLE FOR YOU, STAY WITH THE MAF SYSTEM, OR AT LEAST LOOK INTO THE PERFORMANCE DIFFERANCES BEYOND THE FACTORY HP RATINGS
the MAF system is much better at accepting MODs
TPIS has donE tests, and they are posted in their INSIDERS HINTS BOOK, THE MORE MODS YOU DO THE MORE HORSES YOU GET FROM THE MAF SYSTEM
IF IT IS POSSIBLE FOR YOU, STAY WITH THE MAF SYSTEM, OR AT LEAST LOOK INTO THE PERFORMANCE DIFFERANCES BEYOND THE FACTORY HP RATINGS
09-22-2000, 07:11 AM
#6
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Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Yes you are right mostly but when you have a minirammed 396 small block the MAF becomes a choking point in the intake. I dont think my engine will appreciate breathing through a straw like it is now.
James
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If the women don't find you handsome they should at least find you handy
James
------------------
If the women don't find you handsome they should at least find you handy
09-22-2000, 03:01 PM
#7
Originally posted by NICK 86 TPI:
WHY??WHY??WHY??would you do such a thing
the MAF system is much better at accepting MODs
TPIS has donE tests, and they are posted in their INSIDERS HINTS BOOK, THE MORE MODS YOU DO THE MORE HORSES YOU GET FROM THE MAF SYSTEM
IF IT IS POSSIBLE FOR YOU, STAY WITH THE MAF SYSTEM, OR AT LEAST LOOK INTO THE PERFORMANCE DIFFERANCES BEYOND THE FACTORY HP RATINGS
WHY??WHY??WHY??would you do such a thing
the MAF system is much better at accepting MODs
TPIS has donE tests, and they are posted in their INSIDERS HINTS BOOK, THE MORE MODS YOU DO THE MORE HORSES YOU GET FROM THE MAF SYSTEM
IF IT IS POSSIBLE FOR YOU, STAY WITH THE MAF SYSTEM, OR AT LEAST LOOK INTO THE PERFORMANCE DIFFERANCES BEYOND THE FACTORY HP RATINGS
Where in the TPIS book is that chart? I dont remember seeing it.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
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09-23-2000, 10:35 AM
#8
Originally posted by scooter:
Yes you are right mostly but when you have a minirammed 396 small block the MAF becomes a choking point in the intake. I dont think my engine will appreciate breathing through a straw like it is now.
James
Yes you are right mostly but when you have a minirammed 396 small block the MAF becomes a choking point in the intake. I dont think my engine will appreciate breathing through a straw like it is now.
James
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92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...
"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)
09-24-2000, 01:13 AM
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91 Z28, THE CHART IS ON PAGE 2, CHART B, IN THE TPIS BOOK
AND JAMES IF YOU HAVE A 396, THAN YOUR RIGHT, GO WITH THE MAP SYSTEM, MY BAD,
I DIDN'T KNOW YOU WERE SO BIG, HA HA
AND JAMES IF YOU HAVE A 396, THAN YOUR RIGHT, GO WITH THE MAP SYSTEM, MY BAD,
I DIDN'T KNOW YOU WERE SO BIG, HA HA
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