mack

iTrader: (2)

Is it worth buying MAF Ends? This eliminates the screen and the flat cross piece.

hammrman31

i bought one for my 95,but never used it because madwolf told me not to. i trust his knowledge.

96capricemgr

iTrader: (1)

Please research how the MAF functions. Once you understand that you will understand why these are a bad idea.

ThoR294

iTrader: (6)

just keep it stock. mmkayyy

the_merv

iTrader: (88)

Might as well go Speed Density..

95ZRagtop6M

I have ported factory MAF ends on my car and noticed no difference in drivability over stock ends. However, I can't tell you if there was an actual performance gain because I never did any before and after testing. Maybe next time I go to the track I'll try both sets.

There may be very good reasons for keeping the MAF ends as they are. It's not obvious to me on this car. But keep in mind, engineers always have to make tradeoffs between performance, reliability, cost, etc. Just because the factory designed something a certain way doesn't mean it can't be improved upon in one area or another.

ThoR294

iTrader: (6)

and its been proven that screwin with the stock maf by removing the screen and modifying it does like nothing

ZFan88

iTrader: (4)

You can buy the maf ends that come with the nitrous kit i'm selling

95ZRagtop6M

Can you point me to some objective test results? 1/4 mile MPH or dyno testing where this was the only change?

InsaneAuto86

iTrader: (60)

I have ported MAF ends and I noticed a loss in low end, and gain in high end performance. Also a drop in MPG.

ThoR294

iTrader: (6)

ive read threads on here. i cant find them right now. Its just silly for the gain, if you get it and the risk you take IMO

95ZRagtop6M

I may log some data with both and compare the results. I'm sure as with any other mod, the results lie in the combo and set up.

96capricemgr

iTrader: (1)

All of you who think this may be of any vague benifit need to do a little research and understand how it functions, once you do that come back and we can discuss it further.

Far as power, Ed Wright found single digit gains completely eliminating the MAF on his 520+rwhp monster and that is with an 8"ATI non-lockup converter through an A4. The tuning is unquestionalbly spot on before and after so the test is valid.
Which makes it laughable that kids with stock cars think the MAF is a restriction on their cars.

speed_demon24

iTrader: (6)

Run 1 stock maf, run 2-3 descreened maf. The car stayed strapped down on the dyno while I swapped out the ends. There was a guy on cz28.com that posted #'s with the stock maf and descreened maf and it gained 200cfm by descreening it, and my tuner recomends descreening it but keeping the stock ends so thats what my setup is now with 400+rwhp.

ThoR294

iTrader: (6)

descreening it does give you moer air flow but its a risk you take.

95ZRagtop6M

There ya go!! Thanks speed_demon24. Interestingly, the a/f ratio did not change when the ends were swapped out. I guess I'll put the ported ends back on eBay

95ZRagtop6M

LOL - I just put the stock MAF ends back on and took it for a ride to log some data.

My AFGS is now 346.5 at 100% TPS and 6000 RPM v. 309.0 at 100% TPS and 6250 previously with the ported ends! Granted it's a little cooler tonight than when I collected the previous file, but...

Unfortunately, my calcuated injector duty cycle is 99.9%!!!! In case you're wondering, I have 30lb Ford injectors.

96capricemgr

iTrader: (1)

The MAF calibration in the pcm is based on a specific crossection, mess with that crossection and the calibration is all wrong.

Your engine was moving the same amount of air the ends with a larger opening and stock calibration in the pcm just endup underreporting what is flowing.

Basically the MAF is heating the little wires inside to a specific resistance the electrical frequency it takes to achieve said resistance is what is output. Air flowing past the wires cools them and basically the more they are cooled the higher the frequency needs to be to keep them heated to their proper resistance. Putting those same electronics in a bigger opening will slow the velocity of the air given the same total airflow, the slower air flow will cool the wires less resulting in a lower frequency needed to warm the wires and therefore a lower AFGS being reported unless it is all recalibrated.

We will all agree than 500cfm through a 2" pipe will move faster than 500cfm in a 4" pipe right, that is what you guys are talking about doing by porting or changing ends. The changes in velocity will affect the wires in the MAF being cooled and if not tuned for results in bad air flow information being used for fueling calculations. Ported or aftermarket ends can be tuned for, but a stock MAF is not a restriction so it is a lot of effort for no purpose.

Far as the descreening, part of that is the exact intake tract and filter being used. If there is some cause of turbulence right before the MAF then a screen is a very good thing. I ruined my screen trying to take it out to do comparative datalogs to show the missreporting . Once the screen was out the short cone filter with a cone in the end I was using caused all sorts of wacky air readings. My cone mounts directly to the MAF and the inner cone comes fairly close to the MAF, without the screen it seems to create a hole in the airflow and it underreports and runs lean as a result. I put on a filter of the same basic size but without the cone in the end and reported airflow goes up and AFR corrects, even though this filter is a restriction.