Ive got a granatelli af here and i cant find any numbers on it to pull up exactly what part number it is. I was told it was from a LS1 car, but it doesnt look like the LS1 style, looks like a LT1 maf, i put it on my 97 SS and it worked fine. I dont know if its camaro/corvette or impala sytle, or cold air or not. any way to check? Its got a number engraved into the top of the plastic but wont pull up anywhere,

4198a-105 ?

89873831120 on the barcode

thanks

 

I'm not a fan of GMS MAF. I bought one and it set off a "left bank lean" code. Sent it back.

 

You are not going to find much if any positive feedback on the Granatelli MAFs, at least not from knowledgeable people.

I would not waste my time trying it, looking at best case hard to tune for and then they are also highly unreliable.

 

I have had a Granatelli on my car as long as I've owned it without issue. I believe the part number is 350111.

 

What else is done to the car?
What is the performance of the car?
Do you have any capability or understanding of how to read datalogs to know the car is running right?

 

The Granatelli alters the output signal at high flow, to fool the PCM into thinking there is less air flowing than there actually is. The results in the PCM providing less fuel flow, and leans out the overly-rich stock programmed target A/F ratio in power enrichment (PE) mode. Why pay $350 to fool the PCM, and make it harder to tune, when with a simple programming change, for far less cost, you can achieve the same results with the stock MAF sensor.

 

They also advertise, .

I thought this was one of the main reason people bought them??

 

junk... buddy lost like 3 tenths with his GMS... stock over that pile of crap anyday...

 

Yeah, they are larger and that's why I bought one back in 99 or so when we were first trying out new parts. Some people had bad luck with them being out of cal and others didn't. Others adjusted the MAF tables. I bought one because I didn't want my blower inlet to be too restrictive. The one I have seems to be interchangeable with the screeend stocker for every day driving. BLMs look pretty good. Power wise - I never really tested it. I will use the stock one exclusively as soon as I put the MAF on the blower outlet side.

For a normal application, I wouldn't spend money on one. Also I believe there are other ones you can buy these days if you have to have a larger one.

 

Do you believe everything you see in an advertisement?

The air flow into your engine has very little to do with the size of the MAF sensor or the throttle body. Yes, if those components are way too small, they will cause pressure loss, which reduces the mass air flow into the cylinders. But once the MAF or the TB is "big enough for your engine's demands" there is virtually nothing to be gained by going bigger. The reduction of pressure loss becomes tiny, so there's no real change. If the Granatelli could actually provide a 60% increase in air flow, why not buy a 4" MAF and see an even larger increase in air flow? Answer - because it won't happen.

What they really need to say is - IF your engine happens to be capable of 60% more air flow, this MAF will not be a major restriction.

Unless you've got some mods you're not telling us about - huge flow heads, large cam - you will not see any MEASURABLE increase in air flow.

 

Bite me!! Never said I believed GMS's advertising. Never suggested that anyone buy this product. Made NO judgement call on whether using this MAF was a good idea or not. jer4251 never even asked the question and neither did anyone else. You want to make a general post about this fine, BUT leave ME out of it!!!!!!!!!

 

"Bite me"...... that was a mature response.

 

Wasn't in a mature mood yesterday and I knew you could handle it.