Naturally I am prejudice since I am the creator and owner of Granatelli Motor Sports but I would like to address everyone comments and concerns.

Evil-Twin since 1998 GMS has now sold a little over 29000 MAF for LS1 Camaro/Firebird and Corvettes. We have always stood behind our products and offer excellent customer support. It’s easy to say there are tons of posts picking on our product. This stems from the fact that the other 28950 customers that like the product don’t talk about it because they expect it to work flawlessly. My family owned a chain of tune up shops in the 70’s and 80’s called Tune Up Masters. We did 8000 tunes ups a day across the 11 western states. We had a hotline for customers to call in with questions and the only people that called where the complainers. The People that were happy very rarely called because AGAIN - WE Expect perfect service. It’s only human nature.

I make this pledge to anyone that has an issue with ANY GMS part. Before you bash and give up on us, call for tech support.

BIG BEN – Thanks for the kind words but if it works on a stock car it should work on a modified car. Every meter goes across a flow bench and they are individually calibrated. These are not just hollowed out meters. We have all seen several other MAF wanna-bes come ago and to date no one has been able to reach CARB testing approval. While most of you guys will say “I don’t care if the part in 50 state legal, the fact is this speak volumes about the parts – it proves that we are in fact calibrating the meters

LOST – Quote “All it does is lean out your mixture. There have been quality issues since day one. Some work, most don't.You can do the same thing with ls1edit.I've been on this board more than two years and I would say failures outnumbered successes five to one.”

A GMS meter DOES NOT simply lean out the mixture in fact our Nitrous meters go rich while under WOT or when the Hot-wire see the Nitrous go past it. We have NEVER had quality issues and I can’t understand why anyone can or would make a blatant statement that is factually untrue. You say you can do the same thing with LS1.Edit. Your right you can but that is way more then $299.00 and it does not bolt on in 5 minutes. Furthermore LS1.Edit works great with any ported meter. Therefore if you have LS1.Edit then the best thing you can do is make the meter as large as possible.

We also offer our Z06 conversion meter http://www.granatellimotorsports.com...50330small.jpg

EVIL BOB Again if anyone had an issue they should have could have called. There are always a few cases where things do not work out but our failure rate is like 1/10 of 1%. If a customer has a lean code they need to call us and we can fix it.

As a matter of fact and interest – Cold air kits cause major turbulence at cruise. The 97-04 Vette has been notorious for this regardless of BlackWing, K&N, Volant, whatever. We offer specific cold air calibrations to address this issue.

VetteRdstr – You lost me, what traces did you run after 3 months? I would love a copy of it so we can learn from it. Long term Vs Short fuel trims fixture? I assume. If there is a problem with a meter it will happen in the first 20 miles.

Another common problem is K&N or other type filter oil getting suck on to the meter wires (elements) You need to keep the wires clean and the burn off relay can only address minor dirt and dust not an ounce of oil.

Stunna Something is way wrong if the meter effects the way your car shifts

MRHTRD – these are the kinds of customers we want – Only we need them to call in so we can help. If a meter goes lean all you need to do is tell us. We can make a meter goes 30% rich so why would we deliberately sell them lean? –We wouldn’t

MEDIVH – There must be a connection if the engine is lean then the temp would go up a little but again the ecm can correct for this. It seems like out of 20 post 5 say they saw a lean condition so maybe the 5 of you need to get together and find out what you have in common - then GMS can address that issue – we are happy to do so

msuc5vette – You go to a tuner that can tune with the any MAF then you need a new tuner.

In closing I can only help if people ask. MTI has been selling our meter since 1998 and he has never had an issue. We have 29000 reason why it works


Testimonials
GMS Mass Airflow Sensor I put a red GMS mass airflow sensor on my red 1998 Formula Firebird and it looks great. Since the installation, the car feels a lot better on acceleration. - J.M.

Hi,I recently bought one of your MAF's for my 1998 Camaro z28. I am very happy with your product. I am a disabled Vet and I am very limited with physical activity. Your maf was very easy to install. - E.F.

I went back to the track Friday with my stock MAF installed. I thought you'd be interested in knowing the results. The car was linearly slower without the GMS MAF sensor. The 60'was about 1/10 slower. It was about 2/10 slower at the 1/8th mile. And the 1/4 was about 3/10 & 3 mph slower. (13.50s @ 103 vs. 13.20s @ 106) The only real variable was the MAF. Other than that, the car had an identical setup.- M.G.

 

Hi, I just bought a GMAS for cold air intakes. My engine light comes on when I drive. I take it off and put the old one on and reset and it is fine. I do think it may have helped performance so I want to correct this so I can keep the part on. Could you give the the tech email so I can send my mods list and get a fix. Thank you its nice to talk to the owner.

 

It would seem this was a well thought out address to specific people.. you took the time to express your feelings.. the funny thing is.. in your testimonials and out of 29,000 cases, you could not include "ONE" from a C5 owner... This is a C5 forum. I won't post to this thread again... WE have all seen data and dyno numbers from C5's. When you go down the track with a stock unit then a Granatelli and you see 2 to 3 tenths slower.. with the granatelli, then put back the stocker and regain your 2 to 3 tenths.. something should click..

 

Want some tuning issues and lots of pinging? Go with it.

 

I haven't had a problem with mine, on a '97 M6. I don't drag race much, but I was consistent @ ~13.4 with just the minor bolt ons. Can't remember it pinging. I roadrace alot; several events since February of this year. A dozen days last year. I haven't even given the MAF a second thought. No codes.
I got mine thru Corvettes of Houston (I think) a few years ago. It looked like someone had tried to port the ends of it. I didn't like the way they looked so I cleaned them up a little. No screen in mine.

 

I do have to tell you that I respect you and your family and I welcome you to this forum with open arms.

The reason why it took 3 months to do the traces? I had to find someone to do them for me. At that time I didnt have ease software. I can contact the person who did them to see if they still have the file but since it was years ago I doubt it they are still available. I did see the info for myself and it was true, the GMAF was hurting performance. I dont take mods off of my car that cost me hundreds of dollars lightly. As you can see since then, I have modified my car to the hilt and I am very happy with it. It just so happened at the time I had your product I ran it for months only to find it hurt performance so it was removed. That doesnt mean that it doesnt work for someone else's car.. Heck, my car didnt like a Boosted MAF either... had to spend lots of money to change that system too.

Best of Luck to you G-Man!! FOI, do you have any new future products on the table for the C5? C6?

VR

 

Well there is a little glich to the GMAS service. The company I bought it from said it can not be returned for a refund because grannatelli will not return money on electronic products. If it is defective it can be replaced. The vendor suggested I go somewhere with LS1 edit. I explained to him that costs around 400 bucks and they could actually adjust my stock MAS if I do that there would be no need for the GMAS. I know it is the GMAS turning on the engine light because I can take it off and install the stock MAS and no engine light put it back on and there is an engine light I reset the light with my hypertech but if I leave the GMAS on the light will come back on, but what puzzles me is there are no fault codes. Why is this? I would really love to use this product but I can not drive around with an engine light on. If you are reading this Mr. G please give this lowly vette owner some advice. These things are expensive and the resale on the forum or ebay is around 150, less than half what I paid. It seems some other guys on here are using it with no problems so maybe I should just get another one and try it. It is no big deal to put it on. Oh well we will see what happens I may call the Granatelli tech guys tomorrow and ask them what they think. If a new one still sets my light off I would think no matter what policy the company I bought the product from would have to give my money back under an implied warrenty no matter what the grannatelli policy is. We shall see. Anyone else go through this process yet?

 

I will personally repair or exchange anyone’s meter that has an issue. Again I know my post was long but I did say we could make a meter go dead rich or lean. SO if the 3 of you that have lean issues call me direct (I am out of the office today but will be back on Thursday) I am happy to exchange – or you can call Mike S today at my office. I will email him a link to this post so is prepared to talk to you guys. Again we can rescale your meters to whatever you need. Naturally LS1.edit does a lot more but it won’t do anything for you that the MAF can’t do. We also offer a HP meter that has the ability to not only show your HP in real time but will also allow you to “bend” your MAF curve anywhere you want it.

http://www.granatellimotorsports.com...programmer.htm

$200.00 to you guys for the next 2 weeks

For those if you that as familiar with ASA racing, they use hand built Lingenfelter LS1 motors. GMS makes a laptop programmable MAF for these engines and everyone that is anyone over there uses our product to ring out the most power possible. That’s a FACT! I drive a twin turbo 427 04 Z06 and of course it has our meter. Needless to say there is no pinging

I agree we don’t give full refunds to customers that have had the meter for over 90 days but we will always take care of you when there is a problem that we created. That is my life guarantee. As for testimonials that are Vette related, the third one from MG is a 2001 Vette Roadster. I know we don’t like to admit that a Trans-Am, GTO or Camaro is like a Vette but the fact remains that they all use the same meter so the testing we do is pretty much the same

More testimonials
Your product is great. I can't say how much horsepower I obtained, but it solve a wide open throttle detonation problem I had caused by a lean mixture (as indicated by an air/fuel ratio monitor), with subsequent overheating and complete loss of power. A custom programmed chip could not solve this problem (although I don't quite understand this). All of the improvements I had done to the induction of the 4.0L engine (custom made cold air intake, K&N huge air filter, and BBK larger throttle body) had resulted in a disaster due to a wide open throttle lean mixture! Your MAF sensor solved all this! - E.C.

It is awesome: the extra power, the extra gas mileage. - S.R.

I purchased your new air intake and MAF for my 2001 C5 Corvette. The installation took about 45 minutes and the performance increase was amazing. All I can say is, "Great Product.".- K.H.

While this first guy has a Ford 4.0 truck it still shows you all that we do make meters that offer way richer setting then stock or leaner.

We are only here to service at your pleasure. I know a lot of you can afford 3 Vettes if you wanted and others can barely make the payment on the one they have. Either way we have never priced ourselves out of the market. We charge the most because we do the most and we are here to help.

I hate to come off rude but I must insist on one point; for anyone to say they can’t tune with or tune around the GMAF they either do not know what they are doing or you have been terribly misinformed. I can tune around the fattest cam and the smallest injector (or largest) to make the most power possible with what I am given. The meter was never designed to be the end all be all product. It was intended to be a simple bolt on that offered better mileage and more power. Which is does.

 

This statment is just NOT true, for so many reasons I don't know where to begin

 

Anyone that spends time on this forum knows the product is not worth the 300 bucks. It causes mostly headaches.

I dont mean to be rude either but I would trust 35-50 forum members over you anyday. If you read these forums a lot there is NO DOUBT more people have problems then not. If the product works so well lets see you back it up with 100% money back. Some people dont need the problems and paying out several hundred to have the car fixed so it runs with your product adds to the cost. If you told me you would take it back if it did not perform as expected when simply BOLTED on that would be something. That is what you claim right? You seem to offer what computer tuners offer, you will fix it if its broke. But I guess you decide that just like computer tuners. When in doubt blame something else and the customer ends up with your MAF on the garage shelf. Agreeing to fix it also gets by many vendors past 90 day policies. Either way the customer gets screwed in the end.

This forum has ended that for many of us. The person asked if your product was worth it and the forum answered. Its not cheap bolt on power with little problems. People sticking with bolt ons are picky about such things thats why many dont make the move to heads and cam and other mods. They bolt on your product and have problems, your product right then and there is not working as advertised. Its also odd the people reporting this all still have your MAF and are still out 300+. I doubt whatever you say will do any good. Knowing most of your MAF units are no longer in their cars is enough for me.

Your return policy states you keep 25% but then it says electronics not included (customers dealers wont take it back at all). You claim you will make it right. Well one way is to offer 100% back minus shipping as long as its sent back in mint condition. State that here and your website. Give back the money to forum members that have your MAF laying on a shelf right now. Forum members not supporting the product makes it a huge risk, the manufacturer not willing to take it back closes the debate. 25%?? You keep 75 bucks plus shipping and what did the customer get?

Screwed. And thats IF you take it back at all. If you really backed the product more people would try it. Bottom line is some C5 owners bought a 300 pound paper weight. BTW, you lost that sale a few posts ago.

 

Well said...

 

Well I have good news. And also thank you Mr.G for posting here. Steve the owner of LS1 performance where I buy almost all my mods is refunding my money since it appears for some reason the product does not want to function with my set up. I am sure it works but I may just have a combination of mods that is causing it to throw a light. Since it would be very expensive to trouble shoot Steve is as I said refunding my money then he is going to check the GMAF and make sure it is not defective. I also may try the GMAF again if he finds trouble with this particular unit. I am happy to see Mr. G posting here because I sincerely believe he has a good product but in case of the C5 there may be a few unknown gliches, and this is a good forum for that discussion. I have read many people that say it works fine and gave them a boost in HP, so I am not giving up on it I just do not want to have to eat 300 bucks if we can not get it to work on my particular car. I think this is what happens when you start modding a vehicle, a product is built around the stock version because you have to start somewhere and that is the logical place. I think it is unreasonable to think it could work in every application. And a refund from grannatelli for the first 90 days is reasonable, you should be able to test the product in that amount of time. I also know it is human nature to here more from the people that have had problems than from the people who are happy. And if you back through the posts on this thread it is close to evenly split. I do not think 300 bucks is unreasonable for a 10 hp gain so like I said if I had a defective unit I am ready to give it a another try, especially if I know I can return the product if it will not operate properly on my application. I am satisfied at this point with Granatelli and LS1 performance.

 

While I appreciate you offer, I have to tell you that my car has another aftermarket maf on it now and the car runs very well. Experimenting with your MAF again would only cost me more money for a new computer tune with no promise of positive results or a means to an end of making it work correctly on my application.

Respectfully,

VR

 

I also have to add...

1. I didnt pick up any HP with your product

2. The only reason I decided to buy the aftermarket MAF that I have now... was to address the higher freq. that I needed to meter the high amount of air flow my car runs now.

Otherwise there is no reason to even buy an aftermarket MAF.. the OE unit does a great job all by itself.

 

I would love to eat my words so lets see if I understand this.

You are offering forum members a special price of 200 over the next two weeks. The MAF should add 10 or so horsepower, can be set by you to also eliminate cold air feeder turbulance issues and simply has to be bolted on. If it does not work as advertised you will refund 100% of the purchase price less shipping to us and we send it back on our dime. Of course it must be returned in new mint condition with all original packing.

If this is what you are saying then I am sorry about the earlier post. Despite what anyone says that would be a fair deal. A return policy like this only have to be 14 to 30 days. Past that could be exchange, restocking etc. If thats the deal I would give one a try myself and run dynos and test the cold air intake etc.

It just sucks most of the people that have problems got burned because the dealer was using your wording from the website. Either 25% restocking or most said it was considered electronic and therefore NO refunds. Your site still says that. Now these people have moved on to other MAFs and what you offer them is useless.

Its true NOW many have had them for a long period of time. Thats not their fault, many tried to return for a refend and were told no. So now six months later you tell them they could have returned it but not now. I would post asking users that had problems within the 90 days and got stuck due to dealer whatever let you know and show links to posts here backing up what happened. Offer them a refund and make the offer above to new customers (even at 300+ is still fair) and you turn the forum happy and sales will soar IMO.

A product not working out for you is not so bad. If you did this customers would know next time they can go back to you because you got their back. MANY forum vendors are like this and it pays big here. If the product is what you say none of this should cost you anything in the long run. Not trying to tell you how to run your business I am just telling you what will kill all doubt about trying your product. Customers listen to other customers here not merchants, make all your customers happy and problem solved.

 

When it sounds to be unbelievable it usually is. This product is built to fool your engine management system. Talk to a tuner for the exact explanation.

 

Cerino, good question. I've meant to post this myself. Interesting reading...

 

I may have mis-spoken I meant to say
"Originally Posted by Granatelli"
Naturally LS1.edit does a lot more but it won’t do anything for youR MAF CALIBRATION that the GMAF can’t BE CALIBRATED TO DO.

cuda - "If the product works so well lets see you back it up with 100% money back." - GMS can't refund the money to a customer that never purchased from us in the first place. If anyone buys the meter direct from us then we alwasy help them AND EVEN ON A REFUND. All we ask is - if you have a problem let us have a crack at fixing it. If we can't fix your problem there is alwasy a 100% refund. As for 25% restock fee that only applies when a customer wants to return a part they don't want anymore or something like that. If Granatelli sells a part to anyone and it does not work - WE WOULD NEVER STICK THEM -
Since I came on this post 2 metrs hav been returned so far for recalibration and both ended up being billet end meters made by Mallory Billet - THEY ARE NOT EVEN GMS PARTS AND NOT CALIBRATED AT ALL. SO in the end GMS is gettign a bad wrap for other companies parts. It's like JET chips tried to go in the meter business and all of a sudden GMS had tech calls up the *** - we finally figured out every one was having trouble with JET but asking us to service them becuase nobody there had a clue

EVIL BOOB - You appear to be one of the customers that chose to complain rather then ask for help. I came here to help and add value to my product. instead you chose to bash and me. It's no wonder so my manufactures don't reveal their own names. I came here to help.

shurite44 - Please call me 805-486-6644 I will send you a meter for FREE and if it works send me the money if it does not I will issue a call tag - WE STAND 101% behind our products

vetterdstr - Thanks for the shot - I am sorry for any inconvenience we may have caused you. As for an other MAF If mine did not work for you then whose did?

Cuda - your 2nd post - You are commingling what a dealer said Vs what we say. How is that fair to GMS. IF ANYONE HAS A METER THAT DOES NOT WORK I WILL FIX IT FOR FREE provided the following rules apply:
1. 1 year old or less
2. no debris has gone through it - including a gallon of K&N oil
3. it must realy be a Granatelli meter not a cheap immitation

GOOSE JR. - Don't be fooled by people that don't know what they are talking about . Our meter is not designed to fool anything. Our meter is calibrated and reports the proper output. Again, half the tuners that claim to be experts don't know what they are doing or saying so they blame the meter or some other part that they are not responsible for. FACT not FICTION

In closing I keep coming back becuase I don't give up easily. I want EVERYONE to say nothing but great things about GMS becuase WE DO CARE if you guys have questions and suggestions I am all ears

http://www.granatellimotorsports.com...0222dsmall.jpg

http://www.granatellimotorsports.com...0222bsmall.jpg

http://www.granatellimotorsports.com...50222small.jpg

Have you guys tried these out - I will offer them to the next 10 order for $60.00 a set

 

I totally agree with blown FRC, but the only downside is it will cost you some money, but in your own mind, you will be satisfied.

Good luck.

 

Mr. Granatelli,

I believe you should take the time and re-read my three previous posts on this thread.

In the first post I was simply responding to another member by listing the problems I have experienced with your product. There were no ill words used on my part about your product or company.

In my second post, I was simply agreeing with a fellow member on the wealth of knowledge that can be found on this forum, and that manufacturer claims are sometimes not on the level. I see nothing in my words that were directed specifically at GMS.

My third post, prior to this one, was a simple agreement with Cuda that my own MAF has simply become nothing more than a paperweight.

The MAF is not the only Granatelli product I have purchased. I am very satisfied with the dual K & N filter and air bridge that I purchased because it had the Granatelli name. I have also decided to purchase a DiabloSport Predator to enhance my ownership experience, and I will probably continue to do so even though you have choosen to label me as a bad element.