got my new AAM angled plenum spacer and decided to bake it! I've been modify my lower/upper plenums, and then coating them with a high temp ceramic paint to lower heat transfer to the intake air...I bake them to help set the paint and make it more durable. Here's some pics of the process:

New spacer w/ all the needed parts for install:

tried to get a photo showing how it's angled; the thicker portion goes on the front (the general idea is that the front 2 cylinders are not getting enough air flow, so by increaseing the space above the intake runners, it'll balance out the the engine and provide more POWER!)


step 1: tape the flat surfaces...I don't want to paint the surfaces to ensure that it's super smooth and will have a proper seal w/ the gaskets.

step 2: cut off excess tape

step 3: paint


step 4:remove tape and BAKE! (I did it @ 300 F...not too hot, but enough that it sets the paint well - the spacer shouldn't see any temps over this, so I didn't go higher) The pic doesn't show it the best b/c of the lighting, but onyl the exterior/interior surfaces are painted, not the sealing surafces.


Here's a pic of the lower plenum that's already done and installed:



*I'm still modifying the upper plenum and hope to finish by the new Year - I'll do a dyno after all of my installs...I've been doing a lot already and have more to come!

-Peter

 

That make absolutely no sense, its the sealing surface that transfers the heat so your efforts are wasted, thats why the thermal kit is a gasket as to block the heat between the sealing surfaces! (think about it)!

 

Nice but as a paranoid person, I be affraid that the paint my chip and go into the engine.

 

I know what you're talking about...and that's why I went with the iso thermal gasket. I would have also sprayed the sealing surfaces, but I didn't want to worry about the possibility of that causing a poor seal (on the off chance that the coating wasn't completely flat) and I didn't think it would help that much (final decision was based on possible power gain vs. liklleyhood of problems). but the coating will still help with lowering heat transfer - we're trying to limit the heat transfer from the plenum to the air - so you can attack it 2 ways (or both):
1) prevent plenum from getting hot (Iso thermal gasket, coating exterior of plenum to prevent heat raidation from engine bay [headers], ....)
2) prevent heat transfer from plenum to air (apply a coating on the interior surfaces that will reduce heat transfer)

Hope that makes sense. (sounds like we have the same understanding of what's going on, but different ways of attacking it)

-Peter


**I know that other cars have similar plenum spacers that are installed for heat transfer reason only...they use a non-metalic material that lowers plenum temps. (I think they're called "Phenolic Spacers")

 

If you see it in person, there's no way it's going to chip. Only concern that had been brought up was that the interior of the plenum does see some oil...but I checked it hot oil would effect the coating and it didn't. (I did the same type of coating on my AEM intake awhile back...it would rub on some random parts b/c of clearance issues, it would get scuff marks, but never chipped)

-Peter

 

Nice work, regardless. Iso-thermal ftw though.

Edited to add: I guess you posted you had iso-thermal too while I was digging for the clapping smiley. Good job.