Oh yeah, Trevor98 is a salesman. Porting your own mafs is a great free mod. Take heed to someone who is trying to sell you something. The GMAFs are having a lot of problems and the price is ridiculus!

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99 SS, Dark Metallic Blue, M6
SLP lid, KN, TBB, SLP Y-pipe, SLP loudmouth
ported MAFs, Fernco, Nitto 315 DRs
Currently: 1/4 13.15@114, 0-60 4.85 (w/passenger) Gtech'd

 

Pinging= Detonation
This is when your air/fuel charge entering the combustion chamber ignites at the wrong time. It's usually due to hot spots in the chamber. Since the explosion is supposed to happen with the piston at the top of the cylinder poised to go down, but doesn't... you can hear the flame front hitting the top of the piston doing bad things.
To give you an idea of how bad detonation is to your engine, inaudible detonation can destroy an engine. Audible detonation is that much worse.
Audible detonation sounds like a jar of marbles being shaken under the hood.
An engine will almost never detonate unless it is under heavy load, either hard acceleration or easy acceleration in too high a gear (lugging).
You can reduce detonation in several ways:
Cool the combustion chambers with a low temp stat, fan switch, larger radiator, TB bypass.
Make sure you are running the highest octane fuel available to you. 91-93 The higher the octane the slower the fuel ignites making it resistant to hot spots.
Keep uncontrolled oil out of the chamber, or anything else that drasticly lowers octane when mixed with fuel.
Richen the A/F mix slightly... can reduce performance if you are not careful.
Run a lower heat range spark plug... can reduce performance.
Hope this helps
If I left anything out, I'm sure someone else will jump in.
Dave

 

I was noticing that he was pushing some kind of product in every post. Definately annoying knowing that he only has his pockets in mind when folks are asking for help.
Dave