Why would it pull timing and fuel? If you increase efficicency and don't upset the a/f ratio, there is no problem.

With the MAF, all we were talking about were integrators and BLMs.

 

I know what I am talking about and I know what your talking about.

You put a set of headers on car...that is going to change the fuel reguirements that motor needs...right...the computer should technically be able to sense this and adjust accordingly back to stock levels.

The computer will try to calibrate so much...but only so much.

Same with any mods on a computer controlled car in regards to getting it in and out.

Who has tested the Gran MAF to really back up claims they lose the gain over time? Pretty straight forward question.

 

To begin with: take a deep breath. I've been on this site for 8 years and if you can't take a little joke... As for the G-MAF, all I'm saying is during that 8 years I've never heard of anyone claiming performance gains from the G-MAF. No, I can't support my opinion, but I can tell you that if I could support that it was worth it, I'd surely have one and so would others.

You shouldn't take things personally when someone just makes a little joke: when someone does make such a comment, it is just another way of telling you to do a little homework (homework is not wholly comprised of "I've got a friend..." The best friends you can have when it comes to the LT1 are right here on this board. JMHO

 

I would like to know if there's any conflicts with a gms maf and mail order tune? Any problems of running rich for a lil while or something..somethin...?

 

I'd like to know this as well. I'm running on the stock tune and after heads/cam my car did not like the granatelli MAF at all. I swapped to the stock maf and all was better. If I can use a bigger MAF I'd like to but I don't want to ruin a good tune, once I get it tuned.

 

That's a common problem with aftermarket mafs and aftermarket tuning. It's easier to tune with the stocker in there, that's why my Granatelli is now for sale.

 

To those supporting this thing how do you claim it provides the gains? Simple as that.

If you claim reduced restriction you are wrong the stocker is well proven to flow enough air for all but the wildest LT1s, if you claim optomized AFR why not spend a fraction as much on pcm tuning that can also optomize timing and other parameters, again at a fraction the price?


CANTONRACER, the pcm senses the increased airflow and gives it approrriate fuel based on MAF and O2 readings(under most conditions). You seem to think the pcm controls air flow and can cut it back, that is not the case and it sounds like you are not as wise as you think you are.

 

according to http://www.granatellimotorsports.com...automotive.htm

Does the computer relearn the fuel and timing curves canceling out any performance gain?
No. GMS mass airflow sensors are "truly calibrated" on our proprietary computerized flow benches and plays no tricks on the factory ECM/PCM.

Are these guys liars?? this was the homework that i did.

 

I am not saying it does or does not make any more power....show me where it has been proven to be tuned out over a period of time...pretty simple eh?

96capricemgr...I am so the wrong person to explain the basics of how these cars work....not saying I am some LT1 super tuner...but I have also been around enough to know internet rhetoric also....just because you read it a dozen times does not mean it is correct...might be...but not always.

 

If the granatelli maf improves HP by leaning out the mixture, then obviously its way too much to pay to lean out your fuel mixture.

If the granatelli maf improves airflow, then its worth the buy. Members are saying that the stocker is not a restriction. Just looking at it, especially that screen, I find that hard to believe. I have no proof that it is, but i have seen no proof that it isnt a significant restriction compared to the MAF. Just beacuse you can produce 600HP on a stock maf doesnt mean its not a restriction on a 400HP car.

Changing headers will not produce any change in the air/fuel mixture that the pcm will have to correct for because the air and fuel are mixed before the air reaches the headers.

 

They would be fools to bad mouth their product on their own website.

I like some of the comments: like "looks great", "easy to install", "car feels a lot better on acceleration", "I love your MAF". Great stuff.

 

Mail order tunes have problems with ported MAF housings because it screws up the calibration of the sensor. Mail order tunes should not have a problem with a Granatelli MAF because it is properly calibrated for the larger cross sectional area of the housing around the sensor itself.

The only gain you SHOULD get by going to a Granatelli MAF is a gain due to increased ACTUAL airflow due to less intake restrictions. You should get no gain due to the MAF sensor reporting a less than actual air flow because it is supposed to be calibrated correctly. FWIW, I have tested my Granatelli MAF sensor and have found it to be accurate with my crude testing. I got a few more gps airflow out of the Granatelli which is to be expected due to the slightly better airflow/less restriction. However, this is where it gets confusing because the minimal increase in airflow seen from the Granatelli should (and I use that loosely because I have nothing to back this up. LOL!) not give you the hp gains Granatelli reports. The only way IMO to get those kind of gains from a MAF sensor are the temporary gains which can be seen immediately after putting on an improperly calibrated MAF sensor (like after porting) which will lean it out slightly short term.

I like the Granatelli MAF because I do everything I can to reduce intake restrictions. Argue if you will but there is no arguing that making the air flow easier on its way to the engine will help improve hp. How much, I don't know... probably not enough for most to justify the cost of the Granatelli but for those who have most other bolt ons and can find one cheap and are looking for every extra single hp, not a bad mod IMO

 

That's a good arguement but not entirely correct. An example I like to use is a 600 HP stroker motor running the stock intake airbox in a 4th gen. It makes 600 rwhp on the dyno through the stock intake airbox. Using this logic you could say the stock intake airbox is good to 600 rwhp. However, if you change out the stock airbox with a FIPK, that same engine might make 640 rwhp. So, it is true the stocker airbox will make and is good to 600 rwhp but it isn't true that just because it WILL DO IT that it isn't hurting you.

Same holds true for the MAF and the throttle body. No matter what, if you can reduce the intake restriction and make the air flow more easily you will increase the efficiency of your engine and make more power. The arguement is not WILL it help because it will... the arguement is does the cost/expense justify the gain. On a completely stock engine a Granatelli MAF or 58mm throttle body might only get your 2 hp (no idea, just an example). Is the 2hp worth $300 or $500? That's the arguement IMO

 

Thank you Brent for the "sage" counsel. I have enjoyed my GMAF for 10 reliable years now. Did it myself, looks good, and in harmony with the other goodies on the car accomplishes what I want.

 

another vote here for the GMAF. on for 3 years, car felt faster after install and still does. also, super chevy did a dyno on this unit years ago on an LT1 and got like 16 rwhp. i see no reason why the magazine would lie.