He wants it to sound cammed out as in the short vrum,rum,rum ,rum up and down at idle . Not the slow high vrooooom, then slow ummmmmmm, vrooooom,ummmmm, like with a bad motor swap in a ricer with the engine sensors,idle control valve,ect not hooked up correctly and the check engine light on.
I have even heard some turbo sound cammed out but most just have a high idle. I don't even think hot cams would give you the verberation you looking for but then again the IIgen compression ratio is so high you never know. My question is do you get this from a top end cam or low end cam?
Maby they are running some crazy map with there o2's deleted. Aftermarket pipes for sure, probably some airbox mod.
How far is that thing stretched.