Post Intercooler IAT Testing

[covertrussian]

I want this to be a sharing thread to build a database of different intercoolers/setups, feel free to post your testing results!

 

Intercooler - Turbo - User

Stock TMIC - Evo III Big 16G - covertrussian

Stock TMIC Pre-Intercooler Temps & Efficiency - Evo III Big 16G - covertrussian

AVO v2 TMIC - BNR Evo III 16G - utc_pyro

Grimmspeed TMIC - EFR 6758 - xtea

Grimmspeed TMIC - BNR Evo III 16G - utc_pyro

 

Template for New Posts:

 

[b]Mods - [i]That Increase Turbo Efficiency or Intercooler Efficiency[/i][/b]
Turbo: VF40
Boost: 15psi
Intake: Stock
Intercooler: Stock
Exhaust: 3" Downpipe Catted, 3" Catback
Heat Shielding: Turbo Blanket / Stock Turbo Heatshields
Undertray: Yes - Stock
Aero: Front Lip


[size="3"]
[center][b]Solo 2nd Gear Pull[/b][/center]
[/size]

[b]Ambient Temp:[/b] (Current outside temp from the dash gauge)
[b]Pre-Turbo IAT:[/b] (Pre-Turbo temps usually from MAF IAT sensor)
[b]Post IC Start IAT:[/b] (Post IC IAT right before the pull)
[b]Post IC Redline IAT:[/b] (Post IC IAT at the redline of the pull)
[b]Post IC IAT Rise:[/b] (Subtract ending temp from starting temp)
[b]Post IC IAT Over Ambient:[/b] (Subtract ending temp from ambient temp)

Graph/description


[size="3"]
[center][b]Multi Pull Stress Test[/b][/center]
[/size]

[b]Ambient Temp:[/b]
[b]Pre-Turbo IAT:[/b]
[b]Post IC Start IAT:[/b]
[b]Post IC Highest IAT:[/b] (After 5-7 pulls, peak IAT, which might not be the last pull!)
[b]Post IC IAT Rise:[/b]
[b]Post IC IAT Over Ambient:[/b]

Graph/description

[covertrussian]

I've been curious on how well stock intercooler works. Thanks to utc_pyro's suggestion on wiring an IAT sensor to the EGT input, this is a reality. Details on how I installed mine can be found here.

 

Mods

Turbo: Evo 3 Big 16g 8cm housing

Boost: 13-14psi

Intake: Custom 3" CAI in Wheel well & Perrin 2.4" STI Inlet

Intercooler: TMIC - Stock

Exhaust: GS 3" DP, 3" Single Exit Catback. No Heatshields on header or Turbo

Heat Shielding: None, no header or turbo heatshields

Undertray: Yes - Stock

Aero: S204 Front Lip

 

Stock Turbo Pre-Intercooler Testing & Efficiency

 

Solo 2nd Gear Pull

These pulls are done in 2nd gear at different temp ranges to compare the intercooler efficiency as ambient temperature changes. The Exhaust Gas Temperature line is the post intercooler intake air temperature feed in these graphs.

 

Ambient Temp: 33F

Pre-Turbo IAT: 37F

Post IC Start IAT: 35.8F

Post IC Redline IAT: 51.5F

Post IC IAT Rise: 15.7F

Post IC IAT Over Ambient: 18.5F

 

http://legacygt.com/forums/attachment.php?attachmentid=262170&stc=1&d=1519137626

 

 

Ambient Temp: 47F

Pre-Turbo IAT: 50F

Post IC Start IAT: 52.7F

Post IC Redline IAT: 64.4F

Post IC IAT Rise: 11.7F

Post IC IAT Over Ambient: 17.4F

 

http://legacygt.com/forums/attachment.php?attachmentid=262171&stc=1&d=1519137626

 

Ambient Temp: 59F

Pre-Turbo IAT: 63F

Post IC Start IAT: 64.4F

Post IC Redline IAT: 77.7F

Post IC IAT Rise: 13.3F

Post IC IAT Over Ambient: 18.7F

 

http://legacygt.com/forums/attachment.php?attachmentid=262172&stc=1&d=1519137626

 

 

Custom CAI:

Ambient Temp: 74F

Pre-Turbo IAT: 81F

Post IC Start IAT: 80.3F

Post IC Redline IAT: 90.2F

Post IC IAT Rise: 9.9F

Post IC IAT Over Ambient: 16.2F

 

http://legacygt.com/forums/attachment.php?attachmentid=262198&stc=1&d=1519184410

 

 

Stock Intake:

Ambient Temp: 76F

Pre-Turbo IAT: 81F

Post IC Start IAT: 80.7F

Post IC Redline IAT: 91.8F

Post IC IAT Rise: 11.1F

Post IC IAT Over Ambient: 15.8F

 

http://legacygt.com/forums/attachment.php?attachmentid=262195&stc=1&d=1519184410

 

Multi Pull Stress Test

Next up is a stress test to see how high the post IC temps would rise up from doing back to back 2nd gear pulls.

 

Ambient Temp: 44F

Pre-Turbo IAT: 47F

Post IC Start IAT: 50F

Post IC Highest IAT: 84F

Post IC IAT Rise: 34F

Post IC IAT Over Ambient: 40F

 

At 44F ambient post IC temps start at 50F, by end of first pull it's 68f, second pull 78F, third pull 83F, fourth pull 84, after that temps stopped rising at 34F over the starting IAT. That equals to 40F over ambient.

http://legacygt.com/forums/attachment.php?attachmentid=262173&stc=1&d=1519137626

 

 

Ambient Temp: 58F

Pre-Turbo IAT: 65F

Post IC Start IAT: 65.5F

Post IC Highest IAT: 96.1F

Post IC IAT Rise: 30.6F

Post IC IAT Over Ambient: 38.1F

 

Starts at 65.5F, first pull 78.1F, 2nd 87.5F, 3rd 91.2F, 4th 93F, 5th 96.1F. After 5th pull I had to make a sharp turn and couldn't floor it right of way, so 6th pull cooled down to 91.6F and 7th 94.3F. This just shows how fast stock IC sheds the heat. That's 30.6F total temp rise and 38.1F rise over ambient.

http://legacygt.com/forums/attachment.php?attachmentid=262174&stc=1&d=1519137626

 

 

Custom CAI:

Ambient Temp: 74F

Pre-Turbo IAT: 81F

Post IC Start IAT: 79.9F

Post IC Highest IAT: 116.8F

Post IC IAT Rise: 36.9F

Post IC IAT Over Ambient: 42.8F

 

Start 79.9F, 1st 98.3F, 2nd 108.7F, 3rd 112.3F, 4th 111.8F, 5th 113.2F, 6th 114.1F, 7th 116.8F

http://legacygt.com/forums/attachment.php?attachmentid=262197&stc=1&d=1519184410

 

 

Stock Intake:

Ambient Temp: 75F

Pre-Turbo IAT: 82F

Post IC Start IAT: 81.4F

Post IC Highest IAT: 118.8F

Post IC IAT Rise: 37.4F

Post IC IAT Over Ambient: 43.8F

 

Start 81.4F, 1st 98.0F, 2nd 107.7F, 3rd 112.5F, 4th 111.2F, 5th 113.2F, 6th 117.4F, 7th 118.8F

http://legacygt.com/forums/attachment.php?attachmentid=262196&stc=1&d=1519184410

[utc_pyro]

Covertrussian asked me to post this, even though he did the analysis

 

Mods

Turbo: BNR Evo 3 16g

Boost: 14-15psi

Intake: Stock w/Perrin Inlet

Intercooler: AVO v2

Exhaust: Tomei ELH, CNT Catted DP, Ividia Q300 catback

Undertray: Yes - Stock

Shielding: Lava Turbo Blanket + Grimmspeed Turbo Heat Shield + Lava up/downpipe wrap + DEI Refletive Gold on TMIC

 

Single 2nd Gear Pull

 

52*f

Starts at 64F post IC, 90F by readline, and peaks at 95F. This is 43F above ambient.

 

Stress Test

 

52f

Three second gear pulls in a row. After the third pull it hit 130F, so a wopping 78F over ambient

 

So yeah, this thing has issues. And it's not just mine that has this problem, see this FLIR video on youtube:

 

[ame=http://www.youtube.com/watch?v=6sveQ7R95g0]2005 Legacy GT AVO TMIC - YouTube[/ame]

 

That video is stationary on a dyno, but it shows that the IC heating up very rapidly like it had a low thermal mass. This got a lot hotter than the same posters video of other intercoolers, including stock ones.

 

When driving along though my intercooler airflow study showes that we still get a lot of air flow even at the lower speeds we're testing this at. If just lack of airflow was the issue, we wouldnt see the huge rise.

[Infosecdad]

Remind me, what heatshielding/turbo wrap setup do you have?

 

Oh, that's not your video... I missed that the first time.

I don't know what fans they may or may not have had for that run, much less what they had for heat shielding from the turbo, so it's hard to say...

[utc_pyro]

Remind me, what heatshielding/turbo wrap setup do you have?

 

Oh, that's not your video... I missed that the first time.

I don't know what fans they may or may not have had for that run, much less what they had for heat shielding from the turbo, so it's hard to say...

 

As you said that’s not my video, but I have a generic “lava” turbo blanket and Grimmspeed heat shield over it.

[covertrussian]

Forgot to mention that I have 0 heatshields on my setup, GS DP's flange is too thick for my stock bolts for the turbo heat shield, need to get some longer bolts...

 

As for the video, it's a little unfair since it's on a stationary dyno with no fan, but it is cool to watch it get hot!

[Infosecdad]

I get fascinated whenever someone is trying to go after real data to understand what is working or not. I'm tempted to try this with my setup as well. I have an infrared thermometer that I can try to hit my AVO TMIC with after a number of pulls, but that's technically not what you all are doing with the GM IAT measuring the air temp of what's entering the throttle body.

 

I have a PTP turbo blanket, stock heat-shield, and SPT heat-shield (both with gold reflective tape) over my VF-52; and gold reflective tape on the end tanks of my AVO. I'd be curious to learn how much that actually helps beyond my perception that it's about all I can possibly do to help. I have a stock intake box with AVO inlet to the VF-52.

 

utc_pryo, did I miss your post about how you tapped and wired up the IAT sensor?

 

Yeah, that video sure shows how a turbo can heat soak a TMIC really quickly.

[utc_pyro]

I get fascinated whenever someone is trying to go after real data to understand what is working or not. I'm tempted to try this with my setup as well. I have an infrared thermometer that I can try to hit my AVO TMIC with after a number of pulls, but that's technically not what you all are doing with the GM IAT measuring the air temp of what's entering the throttle body.

 

I have a PTP turbo blanket, stock heat-shield, and SPT heat-shield (both with gold reflective tape) over my VF-52; and gold reflective tape on the end tanks of my AVO. I'd be curious to learn how much that actually helps beyond my perception that it's about all I can possibly do to help. I have a stock intake box with AVO inlet to the VF-52.

 

utc_pryo, did I miss your post about how you tapped and wired up the IAT sensor?

 

Yeah, that video sure shows how a turbo can heat soak a TMIC really quickly.

 

Here is the post where I installed it

 

Here is Covertrussian's install

 

I'm about to move my IAT senor into the throttle body hose so I can use the current port as a boost reference location. As you're local, we could swap the modified hose and wiring harness into your car and test your intercooler/turbo combo. AVO went through a few revisions, so oyu may have a different one.

[covertrussian]

Since my turbo Infiniti G20 has a much more ideal FMIC setup, I wanted to do the same kind of testing and see how it compares to the Legacy.

 

Mods

Engine: FWD SR20DE+T

Turbo: Garret GT28r + Disco (GT2860r) Compressor Housing

Boost: 10psi

Intake: 3" Intake inside Engine Bay

Intercooler: FMIC - Precision 350hp

Exhaust: 3" Single Exit Catback. Turbo Manifold heatshield only

Undertray: None

Aero: None

 

For reference here is the picture of the engine bay, notice that the intake is sucking in engine bay air.

http://legacygt.com/forums/attachment.php?attachmentid=261953&stc=1&d=1518667782

 

 

Solo 2nd Gear Pull

 

Ambient Temp: 58F

Pre-Turbo IAT: n/a (hot)

Post IC Start IAT: 59F

Post IC Redline IAT: 68F

Post IC IAT Rise: 9F

Post IC IAT Over Ambient: 10F

 

First pull of the night: Post intercooler temps start at 59F and hit 68F by redline, which is 9F of rise and 10F over ambient. What's interesting is on decel it instantly goes down to 64F

http://legacygt.com/forums/attachment.php?attachmentid=261950&stc=1&d=1518668316

 

Multi Pull Stress Test

 

Ambient Temp: 58F

Pre-Turbo IAT: n/a (hot)

Post IC Start IAT: 69F

Post IC Highest IAT: 100F

Post IC IAT Rise: 31F

Post IC IAT Over Ambient: 42F

 

 

These were done after three 2nd gear pulls, IAT's wouldn't go down to ambient no matter how much I drove, they were stuck at least 10F above ambient after those three initial pulls.

 

IAT start at 69F, 1st pull: 80F, 2nd: 86F, 3rd: 91F, 4th: 95F, 5th: 96F, 6th: 100F, 7th: 100F. That's 31F rise from start to 7th pull, and 42F rise over ambient.

http://legacygt.com/forums/attachment.php?attachmentid=261951&stc=1&d=1518668316

 

86F Ambient - Autocross

I dug up an autocross log from one of the laps during a hot 86F event. Idling I would get 134F, but during the lap it actually dropped down to 120-122F, then back to 134F while waiting for next turn. Even during that hot day, IAT's were only 36F higher then ambient.

http://legacygt.com/forums/attachment.php?attachmentid=261952&stc=1&d=1518668316

 

Conclusion:

• Even with a proper FMIC setup and less boost, I still had 10F rise in temp by redline at 58F.
  
• The 2nd gear stress test still pushed the temps into 100's even with a non-engine bay mounted intercooler.
  
• Legacy's TMIC drops temps MUCH faster and can get back down to ambient temps, no matter how much I drove around G20's temps would still be 10F above ambient. This could be because the Legacy has a proper cold air intake, while G20 has a warm air intake. Also G20's IAT sensor in an aluminum pipe inches from throttle body, so it might heat soak.
  
• Maybe TMIC is not so bad....
  

[xtea]

Ok, someone do Grimmspeed! Love seeing it put to rest that the stock intercooler is better then avo, and probably perrin with bp mod.

 

I have a post intercooler iat and ap v2 w/ grimmspeed. I can maybe do some logging tomorrow. I can't make the data pretty but I can send the excel file to someone.

[covertrussian]

Ok, someone do Grimmspeed! Love seeing it put to rest that the stock intercooler is better then avo, and probably perrin with bp mod.

 

I have a post intercooler iat and ap v2 w/ grimmspeed. I can maybe do some logging tomorrow. I can't make the data pretty but I can send the excel file to someone.

 

YES!!!! I'll send you a PM with some more details on how I test and my email. If you send me the logs I'll graph them.

[rhino6303]

I'm thinking of putting an iat sensor post intercooler just in case I ever go speed density. Has anyone ever used a vacuum port that you install in a vacuum hose? Like this:

 

www.siliconeintakes.com/holset-turbocharger/-p-500.html

[utc_pyro]

I'm thinking of putting an iat sensor post intercooler just in case I ever go speed density. Has anyone ever used a vacuum port that you install in a vacuum hose? Like this:

 

www.siliconeintakes.com/holset-turbocharger/-p-500.html

 

I have one of these on the way, will let you know how it works in a few weeks.

[rhino6303]

I have one of these on the way, will let you know how it works in a few weeks.

Thanks. I'm hesitant to cut a hole in my grimmspeed outlet hose.

[xtea]

Thanks to Covert for graphing these for me. Excel wasn't taught in high school in 96.

 

Mods

Turbo: EFR 6758

Boost: 26psi

Intake: Custom 3" in wheel well.

Intercooler: Grimmspeed TMIC unpainted

Exhaust: Full Race 1.5 scroll EL header, modifed STI uppipe for rotated, 3" straight with AVO mufflers

Undertray: Yes - Stock

Shielding: Lava Turbo Blanket + Lava up/downpipe wrap + DEI Cool Tape + Thermal Coating on Headers.

 

Single 2nd Gear Pull 16 degree ambient

 

 

7 pulls

 

 

9 pulls

 

[covertrussian]

How does the EFR 6758 turbo compare to VF or Mitsubishi turbos, which one would be the closest?

 

Based on the solo 2nd gear pull it looks like temp rises 4F, but repeated pulls are only 2F per pull.

 

I would love to see similar pulls at at 40-50F!

[xtea]

Ill do more logs when it gets to 50.

 

The 6758 on e85 and 26psi breaks 300wtq at 3150 and stays above till redline. It breaks 400wtq at 3400 and doesnt go below till just after 5000. My charts are in the dyno section. Its like a 16g with dom 1.5 up top. My build is drop in ready for a 7163. Hoping to do back to back dyno comparisons this summer or next.

 

Most of those second gear pulls i was spinning tires. It was cold but I do have hakka r2’s.

[covertrussian]

Thanks to Covert for graphing these for me. Excel wasn't taught in high school in 96.

 

Completely missed this! I'm actually using a tool build by a RomRaider member "vgi". It's called MAFScaling.

[covertrussian]

Was able to do a ~60F test yesterday.

 

Solo Pull

Ambient: 59F

 

Post IC IAT at start of the pull: 64.4F, by redline 77.7F, that's 13.3F total rise in temp and 18.7F over ambient

http://legacygt.com/forums/attachment.php?attachmentid=262172&stc=1&d=1519137626

 

Stress Test

Ambient: 58F

 

Starts at 65.5F before the pull, first pull 78.1F, 2nd 87.5F, 3rd 91.2F, 4th 93F, 5th 96.1F. After 5th pull I had to make a sharp turn and couldn't floor it right of way, so 6th pull cooled down to 91.6F and 7th 94.3F. This just shows how fast stock IC sheds the heat. That's 30.6F total temp rise and 38.1F rise over ambient.

http://legacygt.com/forums/attachment.php?attachmentid=262174&stc=1&d=1519137626

 

What's interesting is, the warmer the ambient temp is, the lower the total IAT rise is: At 44F I hat a 34F IAT rise and 40F rise over ambient.

 

I'm going to try to do this test with stock intake today.

[xtea]

Hair dryer has a limit to how hot its going to blow how fast at what psi. If you want to create the greatest difference between ambient and post ic iat then the colder it is the greater that difference will be. When 60 degree air meets 60 degree air they dont add to each other but 30 meeting 60 will net something in between.

[covertrussian]

More off, I'm surprised that with much colder air blowing through the intercooler, that it rises higher.

[utc_pyro]

The heat rise from the turbo charger is a result of the adiabatic compression for the air. Thus there really isn't a limit of how hot it can get unlike a hair drier, it going to be dependent on the inlet temperature and pressure ratio. Let’s look at the physics!

 

Key:

Ta = Ambient temperature (absolute)

T1 = Turbo inlet temperature (absolute)

T2 = Turbo Outlet Temperature (absolute)

T3 = Intercooler Outlet Temperature (absolute)

P1 = Turbo inlet pressure (absolute)

P2 = Turbo Outlet pressure (absolute)

P3 = Intercooler Outlet pressure (absolute)

PR = P2/P1 - turbocharger Pressure ratio (absolute)

Teff = Turbocharger Effiency

Ieff = Intercooler Effiency

 

In an ideal world, due to Adiabatic compression, the turbocharger’s output would be:

 

T2 = T1*(PR)^.286 + T1

 

In reality, the turbo charger isnt 100% efficiency. The actual effiency can be found on the compressor map for a given PR and flow rate. This makes the output

 

T2 = [(T1*(PR)^.286)-T1]/Teff + T1

 

Intercooler efficiency should be more or less constant with cooling airflow rate. The thermal mass of the intercooler will cause the rise and fall in temperature to lag from that theoretical efficiency, and there is an absolute limit to how much heat the thing can reject, but let's ignore that and focus on the stress test values once the max out. That gives:

 

T3 = T2 - (T2-Ta)*Ieff

 

So how does a change in ambient effect all this? Let's fix the PR at 2, Ta=T1, Teff = 70%, Ieff = 70% and see. Let's also use a -3*C and 27*c day to make math easy.

 

Hot day (27c)

T2 = (300k*2^.286-300k)/70% + 300K

T2 = 394K

T3 = 394k - (394k-300k)*70%

T3 - 328K, 55c, or a rise of 28c over ambient.

 

Cold day (-3c)

T2 = (270K*2^.286-270k)/70% + 270K

T2 = 311k

T3 = 311k - (311K-270K)*70%

T3 = 282k, 9C, or a rise of 12c over ambient.

 

So it interesting you're seeing a higher rise at low temperature, as the math suggest it should go the opposite.

 

Edit: also the math shows inlet temperature and depression has a major effect on the outlet temperature. Anything you can do to give a cooler charge with less pressure drop will reduce the heat added to the system. That said intercooler effiency has an even bigger impact.

[covertrussian]

Did some more tests today since it hit 75*F. I tested my custom CAI and stock intake, temp wise the difference was negligible . Gonna post mainly raw data, graphs can be found in my main post.

 

Solo Pulls:

 

Custom CAI listed First / Stock Intake Second

Ambient Temp: 74F / 76F

Pre-Turbo IAT: 81F / 81F

Post IC Start IAT: 80.3F / 80.7F

Post IC Redline IAT: 90.2F / 91.8F

Post IC IAT Rise: 9.9F / 11.1F

Post IC IAT Over Ambient: 16.2F / 15.8

7 Pull Stress Test:

 

 

Custom CAI listed First / Stock Intake Second

Ambient Temp: 74F / 75F

Pre-Turbo IAT: 81F / 82F

Post IC Start IAT: 79.9F / 81.4F

Post IC Highest IAT: 116.8F / 118.8F

Post IC IAT Rise: 36.9F / 37.4F

Post IC IAT Over Ambient: 42.8F / 43.8F

 

Custom CAI: Start 79.9F, 1st 98.3F, 2nd 108.7F, 3rd 112.3F, 4th 111.8F, 5th 113.2F, 6th 114.1F, 7th 116.8F

Stock Intake: Start 81.4F, 1st 98.0F, 2nd 107.7F, 3rd 112.5F, 4th 111.2F, 5th 113.2F, 6th 117.4F, 7th 118.8F

http://legacygt.com/forums/attachment.php?attachmentid=262196&stc=1&d=1519184410

 

What's really interesting is how quickly the IAT temp would drop when it was above 110F, withing couple seconds it would be at 100F, then would take another 30 sec to drop to 90F and another 30 sec to drop to low 80's.

[covertrussian]

I installed another temp sensor, this time right before the intercooler. This allowed me to measure how efficient the stock intercooler is, which is very important for being able to compare one intercooler to another on different setups.

 

First will start off with a stress test, at 40F ambient, pre-intercooler temps hit 180-205F temps!

http://legacygt.com/forums/attachment.php?attachmentid=262628&stc=1&d=1520060281

 

Next is a solo 2nd gear pull with bunch of data graphed to show relations between each other. Keep in mind that since I couldn't log pre and post IC temps at the same time, I did two separate pulls and combined the data together, it's not gonna be 100% accurate but close enough.

http://legacygt.com/forums/attachment.php?attachmentid=262629&stc=1&d=1520060281

 

With that data logged I can now take it a step further and calculate the intercooler efficiency.

 

Formula: Intercooler Efficiency = (Pre IC Temp - Post IC Temp) / (Pre IC Temp - Ambient)

 

Ambient temp was at 39F, but notice the MAF IAT, even though it was cold and windy stock intake refused to go down to ambient temps like my cold air intake would.

RPM	PSI	IAT	Pre-IC	Post-IC	Diff Efficiency
2090	1.29	48	75.8	49.5	26.3	71%
2163	1.54	48	75.8	49.5	26.3	71%
2201	1.8	48	75.8	49.5	26.3	71%
2232	2.09	48	76.5	49.5	27	72%
2332	2.33	48	76.5	49.5	27	72%
2310	2.64	48	77.2	49.5	27.7	73%
2402	2.94	48	77.2	49.5	27.7	73%
2430	3.27	48	77.2	49.5	27.7	73%
2500	3.61	48	77.9	49.5	28.4	73%
2544	3.96	48	78.6	49.5	29.1	73%
2629	4.38	48	78.6	49.5	29.1	73%
2674	4.84	48	79.3	49.5	29.8	74%
2710	5.35	48	80	49.5	30.5	74%
2798	5.99	48	81.4	49.5	31.9	75%
2850	6.83	48	82.8	49.5	33.3	76%
2927	7.53	48	82.8	49.5	33.3	76%
2967	8.32	48	84.8	49.5	35.3	77%
3064	9.07	48	86.9	49.5	37.4	78%
3111	10	48	89.7	49.5	40.2	79%
3184	11.2	48	89.7	49.5	40.2	79%
3298	12.32	48	92.5	50.2	42.3	79%
3337	13.22	48	96.6	50.2	46.4	81%
3473	13.34	48	100.8	50.2	50.6	82%
3492	13.41	48	100.8	50.2	50.6	82%
3609	13.35	48	104.9	50.2	54.7	83%
3638	13.33	48	109.1	50.9	58.2	83%
3780	13.33	48	113.9	50.9	63	84%
3859	13.29	48	113.9	50.9	63	84%
3966	13.33	48	118.1	50.9	67.2	85%
3994	13.27	48	122.9	51.6	71.3	85%
4107	13.38	48	127.1	51.6	75.5	86%
4235	13.23	48	130.5	52.3	78.2	85%
4300	13.33	48	130.5	52.3	78.2	85%
4418	13.27	48	134	52.3	81.7	86%
4454	13.21	48	137.5	52.3	85.2	86%
4592	13.12	48	140.9	53	87.9	86%
4644	13	48	140.9	53	87.9	86%
4758	12.95	48	143.7	53	90.7	87%
4872	12.89	48	146.5	53.7	92.8	86%
4950	12.82	48	148.5	53.7	94.8	87%
5050	12.7	48	148.5	54.4	94.1	86%
5074	12.6	48	150.6	54.4	96.2	86%
5213	12.59	48	153.4	55.1	98.3	86%
5257	12.5	48	156.8	55.8	101	86%
5425	12.41	48	156.8	55.8	101	86%
5465	12.33	48	159.6	55.8	103.8	86%
5593	12.28	48	162.4	56.5	105.9	86%
5655	12.15	48	164.5	57.2	107.3	85%
5668	12.07	48	166.5	57.2	109.3	86%
5760	11.92	48	166.5	57.8	108.7	85%
5913	11.94	48	168.6	58.5	110.1	85%
5983	12.04	48	170.7	59.2	111.5	85%
5992	12.24	48	172.8	59.2	113.6	85%
6070	12.3	48	172.8	59.9	112.9	84%
6140	12.22	48	174.8	60.5	114.3	84%
6293	12.09	48	176.9	62	114.9	83%
6367	11.99	48	179	62	117	84%

 

Well there you have it, the stock intercooler is up to 87% efficient at removing charge heat on these solo pulls, that's flipping amazing. Now cold weather probably did help, but even at 77F I measured only 11*F post intercooler temp rise, which tells me it should be just as efficient still.

 

What about intercooler efficiency during a stress test?

Sadly since I can't log both pre and post IC temps, and I didn't think about doing a stress test with post-IC temps I'm extrapolating the post IC temps from my 44*F stress test.

 

Ambient temp: 40F

RPM	PSI	Pre-IC	Post-IC	Diff	Efficiency
2318	3.14	157.5	81.5	76	65%
2370	3.46	157.5	81.5	76	65%
2400	3.85	156.8	81.5	75.3	64%
2483	4.21	155.5	80.6	74.9	65%
2548	4.62	154.8	80.6	74.2	65%
2620	5.06	154.8	79.7	75.1	65%
2657	5.58	154.1	79.7	74.4	65%
2703	6.13	153.4	79.7	73.7	65%
2789	6.82	152.7	79.7	73	65%
2862	7.86	152.7	78.8	73.9	66%
2936	8.65	152.7	78.8	73.9	66%
2972	9.67	153.4	78.8	74.6	66%
3072	10.61	154.1	78.8	75.3	66%
3134	11.83	155.5	77.9	77.6	67%
3266	12.95	155.5	77.9	77.6	67%
3329	13.61	157.5	77.9	79.6	68%
3376	13.68	159.6	77.9	81.7	68%
3480	13.61	161.7	77.9	83.8	69%
3568	13.61	161.7	77.9	83.8	69%
3683	13.54	163.1	77.9	85.2	69%
3748	13.53	165.2	77.9	87.3	70%
3870	13.57	166.5	77.9	88.6	70%
3896	13.51	166.5	77.9	88.6	70%
4049	13.48	167.9	77	90.9	71%
4124	13.44	169.3	77	92.3	71%
4195	13.46	171.4	77	94.4	72%
4270	13.44	172.8	77	95.8	72%
4374	13.45	172.8	77	95.8	72%
4502	13.41	174.2	77	97.2	72%
4570	13.31	175.5	77	98.5	73%
4706	13.33	176.9	77	99.9	73%
4727	13.22	176.9	77	99.9	73%
4841	13.22	178.3	77	101.3	73%
4912	13.1	180.4	77	103.4	74%
5016	13.07	181.8	77.9	103.9	73%
5130	12.94	181.8	77.9	103.9	73%
5230	12.87	183.2	77.9	105.3	74%
5313	12.76	184.5	77.9	106.6	74%
5355	12.74	185.9	77.9	108	74%
5430	12.61	187.3	77.9	109.4	74%
5530	12.5	187.3	77.9	109.4	74%
5598	12.4	189.4	78.8	110.6	74%
5752	12.31	190.8	78.8	112	74%
5831	12.23	192.2	78.8	113.4	75%
5837	12.23	192.2	78.8	113.4	75%
5930	12.37	193.5	78.8	114.7	75%
6074	12.55	194.9	79.7	115.2	74%
6150	12.49	196.3	80.6	115.7	74%
6170	12.37	196.3	80.6	115.7	74%
6233	12.21	198.4	80.6	117.8	74%
6399	12.17	199.8	80.6	119.2	75%
6460	12.14	201.2	80.6	120.6	75%

 

These are slightly underrated since I used 40F as ambient instead of 44F (which costs about 3%). Even with a heat soaking stress test stock intercooler maintained up to 75% efficiency, that's still very impressive!

[Captainlvsac]

Great thread. I am looking forward to seeing how some of the aftermarket TMIC's stack up .