MAF Differences

[PCGUY112887]

Is the MAF sensor in my 96 Grand Prix any bigger/smaller/different than the MAF available in newer 3400 powered vehicles? Was looking at my intake today and how small the inside of the MAF was so I wondered if there were any "stock" upgrades.

Thanks.

[IsaacHayes]

Same IIRC.

You could get an LS1 MAF and then re-scale your tables to match it's calibration. Those are a lot bigger inside...

[robertisaar]

Same IIRC.

You could get an LS1 MAF and then re-scale your tables to match it's calibration. Those are a lot bigger inside...

3" IIRC...

EDIT: found this...... somewhere

"LA1 MAF (stock) is 67mm through the center and 78mm at the outlet. The LS1 MAF is 85mm through the center and 100mm at the outlet."

so its almost 3.5"

[geldartb]

Same IIRC.

You could get an LS1 MAF and then re-scale your tables to match it's calibration. Those are a lot bigger inside...

thats all i did. except mines an LS2. the LS1 maf's are the same physical size of the one you have now. The Ls2 ones are the bigger ones.

http://i60.photobucket.com/albums/h5/95blackz26/Grand%20Am/IMG00018-1.jpg

AF10043 ls2 P/N
AF10044 ls1 P/N delphi numbers btw

http://go.delphi.com/CS/dpss/catalog/ProductInformation.aspx?PartProductID=AF10044&PartNumber=AF10044

http://go.delphi.com/CS/dpss/catalog/ProductInformation.aspx?PartProductID=AF10043&PartNumber=AF10043

[AaronGTR]

thats all i did. except mines an LS2. the LS1 maf's are the same physical size of the one you have now. The Ls2 ones are the bigger ones.

http://i60.photobucket.com/albums/h5/95blackz26/Grand%20Am/IMG00018-1.jpg

AF10043 ls2 P/N
AF10044 ls1 P/N delphi numbers btw

http://go.delphi.com/CS/dpss/catalog/ProductInformation.aspx?PartProductID=AF10044&PartNumber=AF10044

http://go.delphi.com/CS/dpss/catalog...Number=AF10043

Think you got that backwards. LS1 is bigger than a stock 3400 or a 96 GP maf. LS1 and LS2 are the same size. Only difference is the LS2 has the IAT sensor built into it and has a 5 wire plug where as the LS1 is 3 wire and the IAT is separate.

[IsaacHayes]

I was going to say no way the LS1 breaths through a 2.5" or so ID MAF.... That's smaller than it's TB...

Some LS1's I think like the Z06 400hp one had a larger MAF though...

[geldartb]

then there were a few people selling maf's that were not what they were claiming on ebay.
some of the ones i saw were clearly not 3.5"

[PCGUY112887]

OK Next question...

Is it worth it to get a bigger MAF? Has anyone that swapped noticed a difference?

[IsaacHayes]

Personally, I would go by the following
1) is the ID of the MAF smaller than the TB opening? If so upgrade.
2) Is the ID of the MAF smaller than the air tube going to the TB? That could be a restriction/turbulence going to the TB... Up to you..

[robertisaar]

^ja, the biggest thing there is determining WHAT is the biggest restriction in your intake. if it is your MAF, then upgrading it would likely bring some performance, assuming it was starting to choke to begin with...

[AaronGTR]

I was going to say no way the LS1 breaths through a 2.5" or so ID MAF.... That's smaller than it's TB...

Some LS1's I think like the Z06 400hp one had a larger MAF though...

Exactly. I'm not sure what the difference was between the Z06 MAF and the regular one, but they do show a different part number and price for 02-04 LS6 MAF from the 02-04 LS1 MAF. That was just a quick check on gmpartsdirect though. I didn't cross reference the part numbers anywhere.

[PCGUY112887]

Alright, so I did some searching and went out and measured, it looks like my stock MAF is about ~67mm inside. Only 2mm then my throttle body, but the MAF has that screen and who knows what kind of percentage that cuts down? It seems to me that my MAF could actually be restricting flow to my TB? I wouldn't want to modify my MAF because the screen is there for a reason, but a bigger MAF would overall flow more with it's screen in theory eliminating any possible restriction?

[robertisaar]

Alright, so I did some searching and went out and measured, it looks like my stock MAF is about ~67mm inside. Only 2mm then my throttle body, but the MAF has that screen and who knows what kind of percentage that cuts down? It seems to me that my MAF could actually be restricting flow to my TB? I wouldn't want to modify my MAF because the screen is there for a reason, but a bigger MAF would overall flow more with it's screen in theory eliminating any possible restriction?

eliminate any restriction: depending on how much your motor wants to breathe, yes or no.

it will certainly reduce restrictions though...

[AaronGTR]

Yeah, that would be the theory. I went from my stock MAF to an LS1 MAF because stock only goes up to 11,500Hz and I was seeing over 10,500Hz, so I was pulling a lot of air through it. I stepped up from a bored stock TB (61mm) to a billet 65mm TB which fits a 3" silicone coupler on the outside. The LS1 MAF is 3.5" on the outside but 3" on the inside, so I figured the inside diameter would be a good match in airflow for the TB.

[PCGUY112887]

Ok, I've been looking up a MAF for a 1998-2002 Chevrolet Camaro Z28, SS 5.7L V8, and I have a number of results that are also from Chevy 1500's and Vans and Tahoe's all various years, these do indeed use all the same MAF and have the same plug?