Engine bay heat on intake manifold
 

I recently went parrallel on turbos and the shop that did it removed the turbo heat shields. I did'nt notice untill yesterday and it got me nervous looking at the close vicinity of exhaust turbine to the LIM. Does anyone know how bad a deal this is or am I overreacting. Thinking about it all day, I feel that instead of polishing and making the intake cool looking, the whole thing should be wrapped with insulation to keep the heat from the intercooler, radiator, and engine block, from soaking into it. Comments?

dont worry not that big of a deal , most guys when they go single dont have heatshields and those big turbos are near the lim , ....of course it would be great ta have a heat shield but youre not gonna explode to bits or anything , youre gonna be fine

I wound up having no choice but to remove mine they were so badly beatup I wouldn't worry to much over it. I haven't had any issues.

i dont have my heat shield on my turbos.. no big deal.. those things can rust off and mazda doesnt have a part # for it

While you guys are saying that you run without them ok, I just wonder why spend $1500 on a big intercooler and then heat up the intake right before the air goes into the combustion chamber?

Thats because the turbo outlet temps are 200F +.

Regardless if you have the heat shields or not, the intake air is still going to re-heat in the manifolds due to heat transfer from the engine block to the LIM up to the UIM. It's just like holding a long pipe over a flame while your holding it from the other end. Eventually the section your holding will get hot due to heat transfer. The only way I know of to avoid this much heat transfer is to have a vented hood to allow for more air circulation or fabricate a plastic or carbonfiber spacer that goes in between the engine block and LIM. This spacer could act like a insulator. This subject is the main reason I wish we had aftermarket carbonfiber UIM & LIM's available because they don't conduct anywhere near as much heat as aluminum does.

Maybe you could try holding the long bar closer to the flame, that should warm your hand nicely:D You really want to get some fibre cloth which is adhesive backed and has a silver lining to reflect the heat and apply it to your LIM.It is available from Summit Racing, apllies really well and moulds nicely to the shape of the manifold an it reflects away large ammounts of heat from the intake charge which your molten turbos will be throwing out.

I like the cloth idea. Thanks

i dont :p: it will look ugly ;) . why not port and ceramic coat the inside of the UIM, LIM, and all other intake pipes that could heat up? the creamic coating (if they can spray it inside...im not sure) would smooth out all the imperfections and give you less turbulant air flow no?

This is what i thought, but when i put it on it looked ok, obviously not as pretty as my polished LIM underneath:(

why not just put the heatshield back on? it would only take you less then 10 minutes to do.

I'll have to see if my shop still has them