if i install the delete kit will my engine be louder ??

 

No, it will just remove the droning sound that erupts nonlinearly in the cabin.

I stuffed my symposer pipe with foam from the discarded engine cover. However it didn't make enough of a difference for me so I'm going to replace the foam with a solid plug.

 

Exactly, the engine will sound the same, but you'll get rid of some artificial droning in the cabin. Makes a marked difference in the V6 cars where you can hear the exhaust in the cabin much better after the symposer mod. I've seen a bunch of V8 owners claiming that the mod did zero difference in their cars, so could be that the difference is less noticeable in the V8 cars because there's more in cabin engine noise.

I stuffed mine with a plug of fireproof insulation material wrapped in aluminum foil which worked great. Much easier than buying a delete kit.

 

I used a piece of tightly rolled ensolite to disable mine. The engine won't sound louder but you'll be able to hear it better. I've come to think the off/on transition of the symposer system is more noticeable with the 6MT since some of the 8AT folks haven't noticed much difference after the symposer defeat mod.

The ensolite plug was effective enough that I noticed no difference from it and the full delete; however, the full delete makes a supercharger oil change almost trivially simple (V6S) and opens up space behind the engine.

 

Someone who is more certain about this can perhaps confirm, but I believe the symposer plumbing is a potential vacuum leak source. Correct? If so, a complete delete removes a potential problem that could be PITA.

 

I haven't heard of any failures in the system causing noticeable vacuum leaks but for the record, complete removal is a complete PITA.

 

How much of a project is it to install the VAP blanking plate or OEM Rover adapter to install on a V8? I am considering this as instead of removing it.