Maf screen removal the pros and cons? - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 10-16-2005, 01:29 PM   #31
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MAF screen out.
4" ultra smooth straight shot inlet tube.
Enough said.
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Old 10-16-2005, 03:54 PM   #32
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The great Warren Johnson said at one time: "If the results do not fit the theory, create a new theory".

While there is a lot of theory being discussed here, the best decision making tool is the end result after a mod is done. Many of the top engine builders have discoverd that big intakes and big exhaust tubes have their own specific use and apllication. The are engine application that like big plenums, others don't. The same goes with exhaust systems; with advent of step headers and Tri-Y headers, the philosophy of running big headers has gone away. When physically possible, the trend is to run smaller tube headers with longer primaries, or if physically you need a shorter header because exhaust constraints, run stepped headers or Tri-Y'*. With intakes, the volumes has been reduced in the plenum to increase velocity, and this also includes the cross-section of the runner. That is why the new generation of flow benches that can measure the energy and pulse are so useful to making power. The flow bench I use in addition to being able to record the pulse vie the pitot tube, I also use food coloring to see the path along the port wall.

If you want to gain the most form your engine, use an efficient cold air intake system and a good flowing exhaust. The effect of the screen is negligible comapred to other items. I consider the screen a safety item for both the engine and SC. There is probably more to be gained by taking the TB off and giving it a good cleaning. I have removed many TB'* and the accumulation of soot will reduce its performance when compared to the screen. Also, always remove the TB for cleaning; spraying cleaner through the TB will create havoc on the SC and also on palstic intakes. Also, I suspect that cleaners could also be the cause to failed intake gasket and leaks. With time, due to thermal cycling, the gaskets will harden. The applications of spray solvent will deteriorate the gasket more and many of these gaskets have a silicone bead that may be harmed. In addition, the intake threads on many cars, have sealant from the factory. The solvent will also dilute the sealer and the bolts will eventually get loose. Just a thougth and consideration.
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Old 10-16-2005, 03:58 PM   #33
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ADTR dyno'd a 99 SE (modified a bit) with 2.5", 3.0" and 3.5" intake diameters. The 3.0 actually dyno'd higher. After dyno, those pipes went to the flowbench and the same draw as the engine'* demand at WOT was applied. The 3.0 flowed more efficiently because of the velocity it was able to achieve.
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Old 10-16-2005, 05:54 PM   #34
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A 99 SE nuf said. . . .Like I said when you get rid of the NA part its a different game.
I don't think we will ever agree on this. I guess people can use what works for them. And I'll use what works for me and be faster!
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Old 10-16-2005, 06:14 PM   #35
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Quote:
Originally Posted by llBlazin_llLo
A 99 SE nuf said. . . .
you obviously dont know who performed the test and their Bonneville backround

my thinking on this....the TB is only 3", so why only have a pipe bigger than the TB... your restriction is the TB, and a larger pipe is in effective...

and im pretty sure that this has gotten off topic...
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Old 10-16-2005, 06:35 PM   #36
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Quote:
my thinking on this....the TB is only 3", so why only have a pipe bigger than the TB... your restriction is the TB, and a larger pipe is in effective...
Wow...some common sense

For air filter tests check out these links:
http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm

http://www.carcraft.com/techarticles...kn/index1.html
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Old 10-16-2005, 06:41 PM   #37
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Not really off topic.
Removal of the MAF screen is all about intake restriction and laminar flow entering the MAF sensor.

The throttle body is actually about 3.5" in diameter.

My vote for the SC L67 is the largest, smoothest, lowest restriction inlet possible.

The differences will not show up until engine rpm exceeds 4500 rpm or until CFM flow is high.
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Old 10-16-2005, 06:51 PM   #38
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No I don't do you want to inform me? It is not going to change anything?

Like I said. . . .
Quote:
Originally Posted by llBlazin_llLo
A 99 SE (edit: being that it is N/A) nuf said. . . .Like I said when you get rid of the NA part its a different game.
AND. . . .
Quote:
Originally Posted by llBlazin_llLo
I don't think we will ever agree on this. I guess people can use what works for them. And I'll use what works for me and be faster!
Also little pet peave:
I love how people on BC say there peace then add at the end 'this has gotten off topic' - You just added to it! Either say your peace OR just say that it has gotten off topic please get it back on. One or the other not BOTH!
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Old 10-16-2005, 07:53 PM   #39
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A little race tip regarding air filters:

I have seen many guys at the race track remove their air filter/cold air cleaner assembly and wrap panty hose material on the inlet of the MAF or TB to keep dirt or objects out.

Some of the guys pick up .10/.15 seconds by doing this.

So...now do you guys have a new performance secret that some guys are using...now, now...don't go out there stealing the panty hoses from your girlfriend'*/spouses...or removing your own...you know who you are...

Color or size does not matter...make it your choice or prefference...
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