3.25 or 3.5 tmic which one would u choose

[ericrapp]

if u dont get a motor mount u can just cut a bit off the intercooler so it wont rub... i remember hearing that 3.5 was too big and that the air ducts didnt cover the entire intercooler. 3.25 would be a good upgrade but you should search and look at dyno graphs with before and after of each.

you guys are confusing me and i am perfectly capable of that on my own. Now first i thought you only needed mm for the 6 due to a hood interference. Secondly i thought ram air feed to 3.5 ets tmic had issue with directing air through all fins.now i just purchased the ets 3.5 and i have to modify my hood set me straight!

 

[ericrapp]

I believe if you shim up the bottom of your intercooler like mine is, you will get more airflow through the thicker core. I raised mine about a 1/4 inch. Anything is better than that stock piece, ill tell you that.

Hey Haltech, is the hood stock and what material did you (heat) use. Also i know im a pain but do you have a good description of shim locations. any piping changes is this with stock okay ill stop now thanks for your help guys

 

[AutoXRacer]

I opted for the 3.25". After speaking with Ken at PG, someone at SU, and another at RPM, they all said the same thing:

3.5" fits fine and it has the best protection against heat soak. But it does not flow as well as the 3.25 since it sits a little too tall in the ducting reducing the efficiency of the airflow through the fins. In addition, long term issue with the 3.5" is that it will damage (pre-maturely wear) the ducting/rubber around the intercooler in a years time. Also, a motor mount is require with the 3.5" core to avoid contact.

The 3.25" core does not have any of these issues; though it does have a slight less resistance to heat soak.

Tests have shown that there is no discernible differences in performance between both units.

 

[Haltech]

Hey Haltech, is the hood stock and what material did you (heat) use. Also i know im a pain but do you have a good description of shim locations. any piping changes is this with stock okay ill stop now thanks for your help guys

MY hood is stock bro. All you need to do is head down to the hardware store and pickup about 20 stainless washers to raise each bolt point up 1/4 inch. I used 4 washers per bolt.

 

[detsilverms3]

question?

couldnt you say just make some sort of heat baffle to put in between the IC and the top of the motor to deflect/absorb some of the heat? just a thought.

 

[Haltech]

question?

couldnt you say just make some sort of heat baffle to put in between the IC and the top of the motor to deflect/absorb some of the heat? just a thought.

Well thats basically what i did by raising the IC off the top of the motor. If gives a better path for the air to pass through the core, onto the top portion of the engine. I may lift it even higher once i do some more testing.

 

[detsilverms3]

Well thats basically what i did by raising the IC off the top of the motor. If gives a better path for the air to pass through the core, onto the top portion of the engine. I may lift it even higher once i do some more testing.

i understand what you did to improve the flow, i guess what i'm saying is take what you're using so far and in between your washer setup say in the middle make a heat shield to keep the underside of the ic a little cooler you could use a piece of aluminum and maybe some dynamat on the underside that to insulate it a bit and that could reduce heat soak a bit more. i'm not sure it would work but it could be worth a shot you know?

 

[jp4130]

That may hinder the airflow through the intercooler.

 

[ericrapp]

MY hood is stock bro. All you need to do is head down to the hardware store and pickup about 20 stainless washers to raise each bolt point up 1/4 inch. I used 4 washers per bolt.

alright, thanks for your response, this stuff is why i'm here (forum)

 

[ericrapp]

Well thats basically what i did by raising the IC off the top of the motor. If gives a better path for the air to pass through the core, onto the top portion of the engine. I may lift it even higher once i do some more testing.

any ideas on removing heat from engine bay? specific to speed3 topmount pushes the hot air to top of engine.I prefer stealth, but compared to fmic i believe removing that heat should be considered .maybe its no big deal.

 

[jp4130]

You could setup a water spray for the intercooler like the STi's have stock. This would be great to combat heat soak, while keeping the stealth look.

 

[ericrapp]

You could setup a water spray for the intercooler like the STi's have stock. This would be great to combat heat soak, while keeping the stealth look.

ive started to look at spraying but i dont know anyone that does unless its a dedicated track car any body with a daily (hard driven) car with this type of application? i hope to realize enough cooler temps without spray but alot is still on the table thanks for thought

 

[Haltech]

Sprayer is a simple mod and i have the parts together for that. The only problem we have is we have to protect the coil packs! So you will have to build a shield to protect the coils and redirect the water to either side.

 

[jp4130]

Sprayer is a simple mod and i have the parts together for that. The only problem we have is we have to protect the coil packs! So you will have to build a shield to protect the coils and redirect the water to either side.

Very good point, I did not think of that.
I guess those boxer motors do not have that problem.
Would a fine mist evaporate before it would cause any
issues?

 

[ericrapp]

Sprayer is a simple mod and i have the parts together for that. The only problem we have is we have to protect the coil packs! So you will have to build a shield to protect the coils and redirect the water to either side.

yes know i am forced to ask a bit more. Good point. i was thinking about evaporation issues, a cryo vs.water and water/combos spray. How quickly would the fluid uh stay fluid with intercooler temp being whatever it is. If its cold their would be no need, but if it was triggered was by a temperature alarm, would that be hot enough to evap spray? Sorry just dumping rough thoughts out

 

[Haltech]

If you have any friends with a WRX, they could give you that data.

 

[Speedy3]

Sprayer is a simple mod and i have the parts together for that. The only problem we have is we have to protect the coil packs! So you will have to build a shield to protect the coils and redirect the water to either side.

When it rains, do you drive your MS3? I live in Washington State and it rains here almost everyday except in August (Maybe not that bad!). Correct me if I'm wrong, but those ducts in the hood direct that rain right into the TMIC and onto the coil packs. What is the issue? They get plenty of water everytime it rains when you drive.

 

[Haltech]

When it rains, do you drive your MS3? I live in Washington State and it rains here almost everyday except in August (Maybe not that bad!). Correct me if I'm wrong, but those ducts in the hood direct that rain right into the TMIC and onto the coil packs. What is the issue? They get plenty of water everytime it rains when you drive.

More than likely the rain doesnt go all the way through. Sure, there may be some water running up the tract but nothing like water an IC sprayer would put out.

 

[ericrapp]

More than likely the rain doesnt go all the way through. Sure, there may be some water running up the tract but nothing like water an IC sprayer would put out.

I still need you guys to help me understand this process(THE FORUM) I realize i'm not running that much power now, but isn't it really just a matter of time. Any body do spray? thanks

 

[Speedy3]

I still need you guys to help me understand this process(THE FORUM) I realize i'm not running that much power now, but isn't it really just a matter of time. Any body do spray? thanks

I have a water mister over my IC. I used plant misting sprinkler tubing and a misting head from Home depot and went to the wrecking yard and picked up a winshield water resevoir and pump. I haven't mounted it yet because of time, but found a place for it right above my MS CAI in the left wheel well. I ran it a few times (jimmy rigged the resevoir mounting for testing), but couldn't datalog the temperature of the IC. I will have more data this summer when i have more time to set things up. I'm not sure if there is a temperature sensor on the intake air past the IC on the intake manifold yet. (Haven't had time) I might mount one temporaily to measure the temp changes, but need to find a way to get it into the piping past the IC without risking FOD into my engine. Not sure if it is really that benneficial from my initial tests.

Oh, and Haltec, water DOES flow into the hood scoop, through the TMIC and onto the valve cover when it is raining. Trust me, I know. I live in the rainiest? state of this country. The coil packs are encapsulated and sealed. No worries about water damage.

On that note, I would NOT use chemical sprays, because of the potential damage to the coil packs and rubber seals around the valve cover, not to mention other stuff in the engine compartment.