MAF

Moot88 · May 19th, 2011, 11:48 AM

Wanted to see what u guys think... Long story short took my car to get my A/F checked at a speed shop and he asked if i have changed anything and i told him i changed my MAF he asked if i got one for the size injectors i have which is 36lb and i told him no i just ran the parts # and thats the one i got... He told me that the new MAF would throw off my tune and he might have to tune it all over again??? I dont understand why that would mess it up

Any ideas? Or just BS

91cobra5.0 · May 19th, 2011, 11:55 AM

of the maf is not calibrated for the injectors then it will not run right but as long as you bought a maf calibrated for 36lb injectors and the same size then he is giving you bs, but a smaller or larger diamater ould through it off, probly not by that much tho

95StangMX · May 19th, 2011, 05:16 PM

What mods are done to the car?

fogged306 · May 19th, 2011, 05:21 PM

Was the car previously tuned by him? If so then yes changing the MAF will throw the tune off because it will be a different MAF curve. If he's tuned the car then you shouldn't need a MAF calibrated for any size injectors, you set the injector size and parameters in the tune itself. If you're running a stock tune, then yes, you need a MAF calibrated for your size injectors or you will run very rich.

95StangMX · May 19th, 2011, 05:24 PM

thats why I was asking what mods, sounded to me stock but with a LOT of injector, do you have enough mods to justify those big squirters?

edit- Just re read your post, sounds like he has already tuned the car once, cause you said retune the car, and also sounds like you just changed the maf for the same one that was in it before, so you should not need to have the car retuned if that is the case, like mentioned above the injector parameters should be set in the tune.

Moot88 · May 20th, 2011, 05:09 AM

Yes he had tuned it before and i just thought the cpu would change it but guess im wrong... And yes i have mods. Its supercharged, cammed, heads, can sit here for days etc... The MAF was bad, i just didnt think changing it would make a difference.

fogged306 · May 20th, 2011, 07:27 AM

Did you actually replace the MAF with the exact same one?

Moot88 · May 20th, 2011, 08:14 AM

Yes part # was the same i made sure to get the right one. I changed the sensor itself. I kept the 76 mm housing or whatever u want to call it.

fogged306 · May 20th, 2011, 12:00 PM

If that's the case then you should be fine. Sensors will vary from part to part, but not enough to throw your whole tune off. If you went with a completely different design and housing, then yes you will need a new tune, but in your case, I don't see a problem. I am just learning tuning, so take that for what it's worth.

Moot88 · May 20th, 2011, 03:26 PM

Thnx for the help..

93hatch · May 20th, 2011, 08:24 PM

surprised a blower car runs with a c and l. Roomys car barely idled with one

FastStang91Lx · May 20th, 2011, 10:37 PM

Surprised anything runs with a C&L... that reminds me, I have to ebay mine.

93hatch · May 20th, 2011, 11:22 PM

I rock a pro-m now happy phaggot?

FastStang91Lx · May 21st, 2011, 12:37 AM

Yessir!!!

93hatch · May 21st, 2011, 12:39 AM

.__.

ryanw · May 21st, 2011, 12:43 AM

Originally Posted by 93hatch

I rock a pro-m now happy phaggot?

Welcome to the pro-M family, its nice to have a new member

93hatch · May 21st, 2011, 12:44 AM

had one in the first fox, untuned 347 c and l ran better. Boom

FastStang91Lx · May 21st, 2011, 01:08 AM

Probably running super lean. You know what they say.... lean is mean. Then KABOOM!

93hatch · May 21st, 2011, 11:10 AM

12.5 across the board untuned....

May 19th, 2011, 11:48 AM	#1
Moot88 Newbie 1988 5.0 Notchback Join Date: Feb 2011 Location: Southeast Posts: 12 iTrader: 0 reviews	MAF Wanted to see what u guys think... Long story short took my car to get my A/F checked at a speed shop and he asked if i have changed anything and i told him i changed my MAF he asked if i got one for the size injectors i have which is 36lb and i told him no i just ran the parts # and thats the one i got... He told me that the new MAF would throw off my tune and he might have to tune it all over again??? I dont understand why that would mess it up Any ideas? Or just BS __________________ I like to go fast and straight

May 19th, 2011, 05:16 PM	#3
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,243 iTrader: 0 reviews	What mods are done to the car? __________________ People should think about boarding up their glass house before starting a rock fight!

May 19th, 2011, 05:24 PM	#5
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,243 iTrader: 0 reviews	thats why I was asking what mods, sounded to me stock but with a LOT of injector, do you have enough mods to justify those big squirters? edit- Just re read your post, sounds like he has already tuned the car once, cause you said retune the car, and also sounds like you just changed the maf for the same one that was in it before, so you should not need to have the car retuned if that is the case, like mentioned above the injector parameters should be set in the tune. __________________ People should think about boarding up their glass house before starting a rock fight!

May 20th, 2011, 05:09 AM	#6
Moot88 Newbie 1988 5.0 Notchback Join Date: Feb 2011 Location: Southeast Posts: 12 iTrader: 0 reviews	Yes he had tuned it before and i just thought the cpu would change it but guess im wrong... And yes i have mods. Its supercharged, cammed, heads, can sit here for days etc... The MAF was bad, i just didnt think changing it would make a difference. __________________ I like to go fast and straight

May 20th, 2011, 08:14 AM	#8
Moot88 Newbie 1988 5.0 Notchback Join Date: Feb 2011 Location: Southeast Posts: 12 iTrader: 0 reviews	Yes part # was the same i made sure to get the right one. I changed the sensor itself. I kept the 76 mm housing or whatever u want to call it. __________________ I like to go fast and straight

May 19th, 2011, 11:55 AM	#2
91cobra5.0 Hardcore Enthusiast 98 Cobra Join Date: Jan 2008 Location: Bay Area, Ca Posts: 2,057 iTrader: 0 reviews	of the maf is not calibrated for the injectors then it will not run right but as long as you bought a maf calibrated for 36lb injectors and the same size then he is giving you bs, but a smaller or larger diamater ould through it off, probly not by that much tho

May 19th, 2011, 05:21 PM	#4
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Was the car previously tuned by him? If so then yes changing the MAF will throw the tune off because it will be a different MAF curve. If he's tuned the car then you shouldn't need a MAF calibrated for any size injectors, you set the injector size and parameters in the tune itself. If you're running a stock tune, then yes, you need a MAF calibrated for your size injectors or you will run very rich.

May 20th, 2011, 07:27 AM	#7
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Did you actually replace the MAF with the exact same one?

May 20th, 2011, 12:00 PM	#9
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	If that's the case then you should be fine. Sensors will vary from part to part, but not enough to throw your whole tune off. If you went with a completely different design and housing, then yes you will need a new tune, but in your case, I don't see a problem. I am just learning tuning, so take that for what it's worth.

May 20th, 2011, 03:26 PM	#10
Moot88 Newbie 1988 5.0 Notchback Join Date: Feb 2011 Location: Southeast Posts: 12 iTrader: 0 reviews	Thnx for the help.. __________________ I like to go fast and straight

May 20th, 2011, 08:24 PM	#11
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	surprised a blower car runs with a c and l. Roomys car barely idled with one __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 20th, 2011, 10:37 PM	#12
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Surprised anything runs with a C&L... that reminds me, I have to ebay mine. __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

May 20th, 2011, 11:22 PM	#13
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	I rock a pro-m now happy phaggot? __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 21st, 2011, 12:37 AM	#14
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Yessir!!! __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

May 21st, 2011, 12:39 AM	#15
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	.__. __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

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May 21st, 2011, 12:44 AM	#17
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	had one in the first fox, untuned 347 c and l ran better. Boom __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

May 21st, 2011, 01:08 AM	#18
FastStang91Lx I Post Entirely Way Too Much 1991 Mustang LX 5.0 Join Date: Jan 2010 Location: Minnesota Posts: 5,572 iTrader: 2 reviews	Probably running super lean. You know what they say.... lean is mean. Then KABOOM! __________________ Point made in less than a few hours with minimal response. http://www.moddedmustangs.com/forums...ml#post4465184

May 21st, 2011, 11:10 AM	#19
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	12.5 across the board untuned.... __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

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