I've seen this pop up on many a performance board and you might be able to do these in a different order as you can with many other vehicles.
First point though: BlazerLT - I've seen a lot of your posts and you are a smart individual on many subject so I don't want to step on your toes on this. Nothing but respect here. There is a possible order change here though as I haven't seen any scientific data on other posts so far... It might have been covered but I haven't seen it.
It might be best to do: Intake, Chip, Muffler.
As everyone knows, the engine is nothing but an overglorified air pump. We need to find where the restrictions are to improve it. Does anyone have any dyno results on what happens when you pull the exhaust off, or the intake seperately? It has been found out on my 2004 Monte Carlo, that the exhaust doesn't really need to be changed until you hit generate more than 300 HP as it isn't that big of a restriction... the restriction is getting air into the engine. This is also on the 3.8 and 3.8 Supercharged version which is a dynamically different engine.
Does anyone know the volume of exhaust that goes out the stock mufflers compared to when you run strait pipe? Also if you pull the air box off and run stock mufflers if it changes in case the intake is choking the engine?
If we don't know these numbers, you always have to start with the intake then exhaust, then chip. If the stock exhuast is great, then you can change the chip as in the case of the Monte Carlo.
Another way of looking at it is air pump example. 1 inch intake tube to pump to 3 inch outgoing tube... doesn't make sense. Flip them around and you still draw the same as the air is not being forced into the engine, it's being sucked by the downward stroke of the piston. The best we can do is make sure the intake is good first, then worry about what is being squirted out the back. Especially if you go the low cost (which I don't recommend) method of cheap parts - Ebay intake $30, exhaust $120.
Hope this helps people.
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Originally Posted by BlazerLT
1.) Muffler
2.) Intake
3.) Chip
TB Spacers are a waste on a 4.3L.
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