the temp of the manifold itself ya, but that doesnt mean the air going into the engine is any cooler :wink:
and since the IAT sensor is before the LIM, you cant measure the air temp before/after that spacer anyways
theres no intercoolering effect from it. its straight through hole, so how is that supposed to cool air? do you honestly think that small amount of surface area is some miracle material thats going to make any difference?
you could get the same, if not better, manifold cooling effect by doing a TB heater bypass and egr delete.
They do keep the plenum cooler which may lower the runner temp by like 1 degree.. once the fuel and air get down through the heat soaked LIM into that hot ass intake port any cooling effect is going to be negated.
IMO the only good use for these is to install nitrous nozzles in.. DPN!
they are of some use on a quad and a quad only because it doesn't have a LIM that's pretty much murder to the v6's. and where almost all of the the intake restriction comes from as well wich was adressed in the newer 3x00 series engines.
I'm not bashing them hell i owned one (and supercharged it). They're torque monsters but technically speaking the LIM makes the use of phenolic spacers almost completely pointless It's not the right mod for this motor in any way and would be IMO a waste of money and buyers beware. Which is relevant to thread about selling them.
Do you know what the material does? It separates the LIM from the UIM with a material that blocks 99% of the what would have been transfered heat. Buy doing this, it reduces the chances for KR and keeps the air denser that much longer. With a forced induction engine, there would be hardly any ill effect for performance. This idea would probably benefit your setup more than anybody elses setup since your SC sits right on top of the UIM.
Now if you installed this on a n/a 2.8/3.1MPFI then it might not be as beneficial as you'd want it to be, but this would be something I'd be giving a shot at over a $300.00 TB or $200 port job.