Elliott's94Z

iTrader: (12)

Ordered a part of Thunder and the sales guy tried to up sell me a Grantenelli?? mass air flow..told me it would add 10-15rwhp I don't believe this unless I see it on the dyno. Anyone???

Fixxer99TA

iTrader: (5)

I wouldent be messing with any MAF until I surpass somewhere around 500hp...

Seen these aftermarket MAFs cause more problems than they are worth...

Dave J

iTrader: (2)

I still use the stock untouched maf with about 550 fwhp and see no restriction in the tune

lt1z28camaro

iTrader: (2)

I have yet to hear a good thing about that particular brand of MAF

HoLLo

iTrader: (17)

X2

I know 2 people who have bought Granatelli MAFs and had to send it back at least three times each before they decided to go back to stock or buy an SLP

LM97Z

iTrader: (4)

Well then call this your 1st. +, i bought my Z with a Granatelli on it allready, its been working fine for 4+ years, NOW, not to say its great or anything, or even suggest it adds HP, I don't believe it does, but i did find out "from a reputable tuner" that it leans out the AFR, i'm looking into getting a stock piece to compare, just like the Hypertech being "so called" junk, mine was in service for 5 yrs. & NO issues, now i've wen't back to the stock tune & sold off the Hypertech, car still feels great, alittle richer, but feels really good, i'll see if it looses or gains anything, as for the Gran MAF, DON'T buy it, its NOT worth what they ask for them, WAY over priced, put your $$$$ elsewhere.

ScreaminRedZ

iTrader: (3)

Yeah, I think the only place you're gonna get a dyno sheet showing any decent gains with it is gonna be from Granatelli themselves.

Elliott's94Z

iTrader: (12)

I figured this was the case...(that they are garbage)

camar0corey

iTrader: (22)

Surprise! I've ran a Grantelli MAF for over 3 years with no issues now, on the dyno A/F wasn't lean.

When I go for a dynotune though, the stocker is going back in.

Edit: I don't know if GMTHP or Camaro Performance(whatever that magazine is called) or anycase, one of the mags did a test with the Granatelli MAF, and it did pick up around 10 at the wheels. Do magazines have a agenda to sell parts? Who knows, I didn't know better and bought the thing years ago, I suppose I could have spent the money elsewhere.

Formula350

iTrader: (3)

Unless someone on a home-made website is posting claims, or someone on this forum(any forum will work that is a fan based, and not a company based) is, I wouldn't trust it. Easily can be biased, as in paid off, to post claims such as that. Might as well just look on the companies website if you want that kind of info

Fixxer99TA

iTrader: (5)

You simply dont need it for horsepower reasons, which this is what was asked. I cant understand why anyone would need to change it (unless of course as described above, your pushing something in the area of 550-600hp). Even then I think its a question of flow and not tuneability (not totally sure on that though, a tuner would have to chime in).

If you want 10hp for that price, sure... If you bought the car with it and it works, even better.

kinglt-1

iTrader: (26)

I had a granatelli. It works if you have it tuned, like I did. I only bought it for my procharger setup that was maxing out the stocker. Since Im back to na now, i threw the stock unit back in and retuned. The drivability improved over the gmaf.

Jon@BruteSpeed

iTrader: (3)

I tried one years ago, lost 9 rwhp. Mine is at the dump.