Scorpio_5.0

my cpu is not programed to understand the Lightning MAF, ok....
But, can my cpu understand a 70mm or 75mm? Or Any non-stock MAF need a tune ?

Because ive heard that (only usa model) 93 svt COBRA had more power (like 235hp/280lb) and that was because of bigger MAF (I could totaly be wrong tho)

Because here in canada, we have some GT CObra but arent REAL Cobra like you have...

88-92 225hp300lbs
93 205hp280lbs
93 (usa only real cobra) 235hp285lbs

Those specs are from :

http://www.edmunds.com/used/1993/for...073/specs.html
http://www.edmunds.com/used/1993/for...079/specs.html

Thx helping me through all this

AdderMk2

you already have a 70mmMAF but only a 60mm tb... with most mild H/C/I combo's you do not need to change the MAF because it it still well within its working limits

luizGT91

80mm maf came in the lincoln mark8 and 93 Cobras had more power due to GT-40 heads and Cobra intake 24lb injectors and 70mm MAF, if i'm wrong i know probably Adder will kick in and correct my wrong azz[&:]

AdderMk2

im not sure what the mark8 had for a maf, but yes, the cobra's made more power because of the heads.... and the cam... and the intake.
ALL 94-95 stangs came with a 70mm MAF, and the MAF is not specific to the injectors... the injectors are specific to the computer

AdderMk2

The ECM does not know, nor does it care what size maf you have.... it wouldnt matter if you went from a stock 55mm maf to an SN-95 70mm maf.. the computer reads thw two the same.. However it does not know how to read the LMAF, like said before.... not due to size.. but electrically.


The cobra had more power because of the heads, cam, and intake.... not to mention the 1.7 roller rockers it had stock, the larger maf, lighter flywheel.. etc etc

Your canadian cobra's are nothing more than GT's.... they are not special

jasonvri

The people who usually oppose the LMAF will argue that if the meter can measure more airflow, then there must be a loss of resolution in the low end of the rpm/load range. IF this were true, it would lead to drivability issues during idle and part throttle cruise.

Luckily, the above is not true...
The 90mm LMAF is one of the most accurate MAF meters we have at our disposal, ESPECIALLY in the low range.

If your motor can't use the full range of the LMAF, there won't be any consequences.


jason

samseed101

Really? Now that I did not know. I assumed that when I bought my Protube blow through MAF I was going to lose resolution on the low end. I was going from a meter that could mesure about 970ish Kg/h at 5v to one that could measure around 1700 or so Kg/h at 5v. I figured that with nearly double the capabilities, I would lose some resoltion because I'm still only using 30 points.

jasonvri

IF all of the data points in your MAF Transfer are evenly spaced over the 0-5v range, then you would lose resolution.

However, when you pull up the Transfer for your meter, you should find that the density of points in the low end is higher than in the high end.
Having more data points in the low range is what helps keep the MAF meter accurate in the low range, while adding flow capacity in the high range.

Every MAF Transfer I can remember looking at did this...

jason

samseed101

Never thought of it that way, but thinking about my transfer table...that is how it looks. Makes sense.