Ross78

What is the best MAF?

I was seriously considering a Granatelli, but after reading a few posts here I am not sure. Did anyone have any positive results with the Granatelli?

How do you know if the car is running rich or lean? I have seen people saying the car ran too rich with the Granatelli?

RPOZ4Z

you will need diagnostic software like AutoTap, EFILive, etc......

I have a Granatelli MAF on my car. It got me closer when tuning than the stock MAF w/no screen.

I was running around 18% lean with the stock MAF and no screen, the Granatelli was about 5% rich.
I was MUCH easier to tune out 5% rich that 18% lean. :cheers:


[Modified by RPOZ4Z, 7:48 PM 11/16/2002]

Ross78

ttt

Crushinator

What mods do you have done so far? I don't think it's necessary to go larger then stock if you only have minor mods.

Ross78

My car is pretty much stock, except for a Blackwing.

I am just looking to do minor things right now, but would like to add things that would work well in the event that I go the route of changing the cam and heads.

ToplessTexan

I'm firmly in the DFWI camp on MAF mods.

MyFirst

The cheapest mod to the MAF that you can do would be to pull the screens. It was worth 3 hp on my friends 2002 Z28. Supposedly it allows greater airflow, less obstruction more airflow go figure, and adds 3 degrees of timing. Goood Luck

Chris@SD

Right there with you Topless! :yesnod: :yesnod:

MattG

If your car is 2001 or newer, just stick with the stock MAF.. I do not feel there is any power hiding out in the MAF sensor on our cars...

If your car is pre-2001, then perhaps think about upgrading to the larger 2001-sized MAF, but even then performance gains will be VERY marginal.

saber

My 97 C5 has always had a rough idle - nothing wrong with the engine, just rough idle.
I have noticed this as typical on other C5s.
I installed the SLP MAF for performance reasons. Performance gain minimal.
To my surprise my idle smoothed out, I can hardly feel the engine even running. Nice extra!

Ross78

After reading the posts. The GMS MAF is no longer a consideration.

I am thinking about the nylon ends that MidAmerica has. They are a bit larger than my stock 99 and would do not have the screen, which a few people suggested to remove.

Toyride

Supposedly the stock MAF flows enough air for appx. 500hp. I installed an SLP MAF just on a whim. It flows enough for 600hp. Just a little overkill.

GDP

http://installuniversity.com/install...afapalooza.htm

Your MAF is hiding horsepower, however whatever gains you get will last for about 40-100 miles until the computer relearns the new settings and makes up for the lean condition that MAF makes. The gains from this mod are permanent if you adjust the computer after the mod. I've never had trouble with this mod on two different cars. More air means more power, and no one can argue with that statement. The MAF flows more air if it's ported and polished.

ToplessTexan

Yes, but one can argue that a bigger MAF doesn't mean more air.

jimman

I agree with Topless and matt, have seen absoluting no gain other than to try and impress someone with all the mods. The engine will take what it wants and that's not your holdup. In fact other things get screwed up.


[Modified by jimman, 2:20 PM 11/25/2002]

skidmarc

Has anyone just polished their stock MAF? Maybe that would be worthwhile instead of a new one????? I have the BPP MAF with airfoils.....who know what this does if anything...my idle is rough and going to do idle relearn this week and go from there!

scool93535

I agree with Chris, especially on the effects of bolt on's on older C5's. The earlier models only made 345HP. Because of this I think the standard bolt ons produce better results then when applied to a later 350HP model.

I have a 97 with the Granitelli MAF. I didn't dyno before and after but, SOP told me it improved performance on mine. Since then I've had it dyno'd and WOT A/F adjusted. See sig for specs. The only things still stock on the intake side are the manifold and TB. On the exhaust side I still have the stock headers and cats.

:cheers:

Daryl

After reading catalog descriptions and hype, I was nearly convinced that I could gain significant HP from adding the Granitelli (sp) MAF to my '02 C5. After reading several posts in this forum and others I wasn't so sure. I then called West Coast Corvettes. The guy I spoke to said he doesn't even carry MAF sensors for '01 and newer C5's mainly due to the size of the the stock MAF. If anything, he suggested removing the screens. I've decided to return the MAF and leave my stock one alone. My .02. :nonod:

scool93535

Yea, if I had something newer, I'd probably agree. :cheers:

chuckster

Matt I agree with you..I just rejoined the stock MAF club. I have had the Breathless Ends on 2 times and both times I put the stock MAF end on the car felt stronger. My azz does not lie.. :D

I now finally believe it's the velocity that the stock MAF offers. Bigger MAF slower air velocity..

Fast air cools the wires faster, thus making for a more agressive A/F

The Bigger MAF ends also caused me k/r problems which drove me nuts! I even argued with people saying that they have nothing to do with K/R.. I was wrong (SORRY). I know know why.....Slower air flow from the bigger MAF made the pcm think there was not much load (even though there is!) ..So in turn the pcm jacks up the timing and Bingo....K/R


Also, I don't know If I agree with just putting the 2001 MAF on a 2000. The MAF table is completely different in a 2001 (as seen in LS1-Edit) The MAF would not be calibrated anymore therefore losing any possible gain.
jmho ;)


[Modified by chuckster, 11:02 PM 11/25/2002]