[Crazystang89]

Backpressure would only affect how much boost you were making and only by a very small amount. More backpressure usually means a little more boost and less backpressure usually means a little less. (This happens only because of how fast the gases can or can't leaving the combustion chamber, which would cause more or less in the intake manifold. Not because your SC is actually making more) Your supercharger just isn't making boost, meaning it's not spinning or it's getting bled off instead of going into the engine. Either it's in the tune or unrelated.

[jgorm]

Originally Posted by theuntouchable

Even though the tune was just fine right up until i removed the cats? What could be wrong with the tune?

What other issue could there be?

Belt slip, vacuum connection to the bypass, internal SC issues, etc.

Originally Posted by gtcrafty

Not enough backpressure?

Needing backpressure is a myth. Its all about exhaust velocity. This is why you have never heard of an exhaust restrictor plug.

Originally Posted by Crazystang89

Either it's in the tune or unrelated.

A tune can't cause a lack of boost on a blower car. On a turbo, its possible, but unlikely that they butchered the tune bad enough to cause a lack of boost.

[mustangdave2008]

Sorry I wasn't clear in my earlier post. You didn't cut off the FRONT O2 sensors by mistake, did you? They are what controls the fuel.
And b.t.w., I did not know you were in Saudi until everyone got pissy and searched your profile. For what it's worth, Saudi has an extremely high rate of health problems per capita such as respiratory problems, skin disease, kidney failures, etc... all being blamed on the air pollution, so I still say put the cats on. Obviously you didn't gain any power by removing them.

[Back@itagain]

Originally Posted by mustangdave2008

And b.t.w., I did not know you were in Saudi until everyone got pissy and searched your profile.

Not a dig but just for future reference, nobody had to search the OP's profile. Bottom left corner under his avatar is his country flag.