First off, before everyone has an aneurysm over this realize that I have a plan. Yes I am thinking about a Granatelli MAF!

Seriously though, I have been researching upgrading to a larger MAF size and cannot see the reason everyone wants to go with the stock 85mm unit. Not only is it not that big of an increase, but an adapter is an additional cost and unless you bought a unit calibrated for the earlier LS1's (which cost more), you will be spending money on a tune anyways. And no, contrary to popular belief, not all of us have LS1 edit software or know how to use it.

Now, with everyone (including myself) going the route of a 90mm or larger intake and throttle body, it makes sense to get a 90mm or larger MAF. I am not thinking about a MAF upgrade as a bolt on power adder, but as a part of the bigger picture.

Here are reasons I am considering this unit:
It is 90mm, it can be bought specifically for my older C5 and not need an adapter, and everything will be going on the car at once followed by a tune. So the problems people have when throwing one on their car as a plug and play unit should not be a problem for me.

So after all that being said, is there anything I am missing or any reasons why my logic is flawed? It is clearly a much better flowing unit than a stock 85mm maf (which really necks down to 80mm in the center). I am also aware of the coupler changes that will need to be made. I will make everything work once I have all the parts and can mock up the system etc.

Remember, it is not being done as an immediate power adder, nor is it getting plugged in and retaining its calibrations. It is being considered as a complimentary sized intake piece for a future goal of big horse power.

Sorry this was a long read, but I do not want to hear about how it is not a worth while upgrade and a waste of money! I believe it is a waste for those of you who just threw one on your bolt on's only car though .

 

Well,,,,,,,,,,,,,,,,,,,,,,,,, See what you TUNER has to say about properly calibrating it so it will work correctly!

If your tuner cant make it work properly, it worthless as **** on a road grader.

I had a LOT of tuners tell me that they HATE tuning them (for what ever reason) and ask the owner to reinstall the GM MAF. If I were you, I would take a 2001+ MAF and adaptor harness to the tuner with you JUST IN CASE, he can not get it to work correctly.

More power to ya if it calibrates properly!

Bi;ll

 

How about a GM LS3 type MAF? I thought they were larger.

 

Not me.....so not "everyone"


Does it? Based on what?

 

Me either...I run a 107mm

 

going from a 85mm to a 90mm?

 

Ok, I will talk to them first.

I dont think they work with an LS1,6,or2 computer, but Id have to look into it.

I will be supercharging in the future, so the larger diameter will help out allot.

I will be going from the 99's stock 75mm maf, not the 85.

 

Will it? In what way? Not giving you a hard time here, but given that you will eventually go with a SC, makes going to a larger diameter MAF even less important.......

 

Card type MAFs work well. Ask me how I know...

 

I guess I am quite confused then. Is not the capability to flow more cfm far more important with a blower? I thought that was the real need for the 102mm intake etc too.
Please do correct me if I am wrong. What is detrimental about a freer flowing maf?

Whats the point of the LPE 100mm maf?

 

My 85mm MAF was swapped out about 3 months ago. Went with a true 90mm inside diameter, card type reader, from RPT and picked up 40RWHP. My 85mm MAF frequency was getting pegged out and the card type MAF is much better since I'm SC already.

 

Yes sir! I'm with you buddy

 

Ya know what, I'll drop it. Conventional forum "wisdom" trumps fluid mechanics any day of the week.

 

OK, I'll bite. What's a card reader MAF, and what's it's advantage?

 

LOL - not a card "reader" MAF. LS3's and up use a different type of MAF than LS1's and LS2's. They fit into a conventional housing or right into the bridge like Halltech does in some of their systems. You can even add it yourself if you're using something like a 4 inch downtube. I wish I had thought of it before I bought a POWRMAF which does use a card type MAF. I may do it anyways just to move the MAF a little farther away from the TB.You can find them as cheap as about $50. Someone above my pay grade could explain the electronic difference between the two types.

They are compatible and Ed Hutchings had no problem when tuning mine with one. I think he would have shot me if I showed up with one of the POS Granatelli paper weights.

Here's what is looks like:



My NA setup is made for putting one in the downtube.

 

So an LS3 card type maf is the best option? What is the diameter of a stock LS3 maf? And what is involved in getting one to work?

 

That question is best asked to the person who will be doing the tuning.

 

Just dump the MAF all together and get a SD tune when you install the blower.

 

Nope, I'd like to remain emissions compliant in California.

 

what does the MAF have to do with emissions?