While this doesn't help with your issue of higher temperatures into the compressor, by relocating the IAT sensor to the TMIC, you could negate some of the negative effects of the SRI like pulled ignition advance based on IAT. Since you're monitoring the intake temps pre-intercooler, you might be pulling timing unnecessarily due to the way those compensation tables are setup. Even if you're not tuning fueling with speed-density, you can benefit from IAT relocation. Beyond that, you're likely going to have to DIY fabricate a shield (or modify an existing aftermarket one to work) or buy another intake. You can always look on the used market and sell the one you have to try to keep expenditures to a minimum.
rqjoe said:
I'd not wrap any of the exhaust stuff. I have always thought the whole idea is to get heat out of the engine post-burn, and also cool the turbo/intake charge. Wrapping these things just seems to me to defeat the purpose. I'd insulate my intake instead. (in fact this is what I did...)
For optimum performance, EGTs should be in the ~850°C (1560°F) range.
To put it simply, heat is energy (more heat = more energy). Hotter gasses travel faster than cooler gasses.
The benefit to wrapping exhaust components and using turbo blankets is that you retain the heat in the exhaust, which helps to spool the turbocharger quicker. The exhaust gas goes into the turbo "hotside" (the hot exhaust air is then sent out the exhaust via the downpipe/catback) and the intake air goes into the compressor side (and is sent to the intercooler). By wrapping your pre-turbo exhaust and hotside (as well as the portion of the downpipe that's in the engine bay ahead of the firewall), you're also reducing radiant heat from exhaust components, which can lead to heat soak in the engine compartment.
The only downsides are:
1) Older wraps could collect flammable liquids (e.g., oil) and cause fires. Newer "titanium" / "lava" wraps
seem to not have this issue like older fiberglass wrap did.
2) Expense (financial / time). It takes time and money to do a good wrap job on an exhaust part.
3) Increased wear/tear on components. The increased heat could cause issues with the metal if it's not strong enough (cracked exhaust manifolds). The wrap can collect rock salt deposits which may cause increased corrosion.
Overall, I feel the benefits far outweigh the negatives. If you can coat the part and wrap it, you've knocked corrosion off the list of downsides (at the expense of your wallet).