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Thinking about TMIC

970 Views 5 Replies 4 Participants Last post by  Hordeolum
Hi all -- thinking about doing some upgrades and not sure if going aftermarket on my TMIC is worthwhile.

Currently have 2012 STi with AEM intake and protuned (EFI) stage I. Numbers on their dyno were 275/311 back in May when i did it. I love the tune but itch for a little more giddyup. And I also wonder if its normal not to feel any diff between S and S# after the tune -- there is no detectable diff now altho theres a big defference between S and I mode.

Anyway was gonna go with a COBB downpipe and a Stage II protune to maybe get up above 300hp/350lb-ft. Question is do people feel an upgraded TMIC on a 2012 is worth the extra bucks? I've read a bunch of threads and still not sure it is worth it on a 2012. I dont think I will be doing too much more, if anything, to the engine.
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From what I've been told by tuners and read on forums, a bigger intercooler isn't needed until you get a bigger turbo.
I wouldn't sweat it. The TMIC was increased in size in 2008 going forward, and no one's really proved any real gains on a stock turbo setup that I know of. It's sufficient to anything the little hairdryer throws out now.

Going larger might even make it more prone to heat soak.


Your S vs S# question is one that likely only the person who tuned it can answer. They may have written the maps to be anything from identical to wildly different. You can even make the I map a rip snorting high boost monster and S# the nerfed map. They are independent of each other, and are programmed by your tuner. Ask them. They'll know the answer.
Thanks --thats what I was thinking. Gonna try to work on reducing heat soak as much as possible. See what the EFI guys think about wrapping the downpipe and the best heat shield for the turbo. That way the IC can do its job better.
Thanks --thats what I was thinking. Gonna try to work on reducing heat soak as much as possible. See what the EFI guys think about wrapping the downpipe and the best heat shield for the turbo. That way the IC can do its job better.
PTP Lava Turbo Blanket + DEI gold wrapped heatsheild of your choice.

Wrap the header with DEI Titanium and spray it really good with the DEI silicone spray to keep it from taking on oil/water and/or falling apart.
Guys at EFI said forget about modding the TMIC with the standard turbo. Suggested going stage II with a higher capacity fuel pump and working on the heat soak with a turbo blanket. They do not recommend wrapping anything as invariably in their experience moisture will get under the wrap and cause degradation of the wrap and the metalwork.

Gotta read about the blanket -- does it degrade the durability of the turbo? would seem to me to keep all the heat in the turbo and not let it cool down, no?
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