B8 A4 intercooler comparison thread

[Marko S]

Post pics as soon as you install it. That thing is sexyyy

[slowone11]

Here we goooo...

[Marko S]

Damnnnn is it just me or is that thing huuuuuge??

Either way looks great!

[slowone11]

Yea man it's like another radiator. Didnt notice much of if any difference at cruising speeds but i also had the a/c on so idk....my p3cars gauge was reading about the same temp for both IC.

[Dub_prime]

I bet the pressure drop is insane... Post some logs if you can please.

[slowone11]

I dont have any way to log

[context.eax]

Can you record the p3cars IAT with a cam while you do a WOT in 3rd gear?
And if possible also record the RPM at the same time.

[boomtime]

Can you record the p3cars IAT with a cam while you do a WOT in 3rd gear?
And if possible also record the RPM at the same time.

This would obviously vary greatly based on local conditions


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[context.eax]

This would obviously vary greatly based on local conditions


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Yes so need to write down the ambient temp also.
Wold be fun to see how close to ambient the IAT will be.

[boomtime]

Probably not that close since the FMIC is a backed up against the radiator and ac in these cars... My EC was typically 20* F above ambient at highway speeds. The stock FMIC is typically 30* above ambient at highway cruise.
Will be interested to see this Wagner but probably the same or close considering the radiator.


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[slowone11]

So at stop light idle the iat is about 10 over ambient temp. Under load it drops to either even with ambient or a couple degrees under. I tried to record it but there was to much glare. It was 90 out and cruising temps tend to be about 5-10 degrees over ambient depending on what my rpms are. If im in 6th and not on throttle its 10 over....if im in 5th and light throttle its 5 over. Man i love seeing these temps. With my stock ic i was getting upwards of 120-130 at cruising in 90+ degrees ambient.

[context.eax]

So at stop light idle the iat is about 10 over ambient temp. Under load it drops to either even with ambient or a couple degrees under. I tried to record it but there was to much glare. It was 90 out and cruising temps tend to be about 5-10 degrees over ambient depending on what my rpms are. If im in 6th and not on throttle its 10 over....if im in 5th and light throttle its 5 over. Man i love seeing these temps. With my stock ic i was getting upwards of 120-130 at cruising in 90+ degrees ambient.

When you say "under load" then what do you mean by that? You hit the throttle a bit or is this WOT?
Also the air coming out of the IC could not possible be colder compared to ambien temp at 90F. (This is what I have learned :))
When you did this test you say it's 90F ambient and according to the wind chill calculator the IC can't cool the air colder than 97F if cruising at 60mph.
So you should see IAT temps above 97F.
Wind Chill Calculator

But don't take this for granted as I am learning this stuff myself. :)

[slowone11]

Yes under load is wot. I took a video this morning and will post it later today.

[dscline]

Under load it drops to either even with ambient or a couple degrees under.

Something is amiss with how this is being measured.

[slowone11]

Why do you say that?

[dscline]

It's against the laws of physics for the air coming out of a heat exchanger to be any cooler than the air being used to cool it (ambient), without some other type of phase change being introduced (such as a sprayed IC). Even a very good intercooler will produce air a fair amount above ambient under load.

[slowone11]

Then i guess the p3cars gauge and computer are not accurate. Im just looking at the temps provided to me from these 2 items.

[boomtime]

Then i guess the p3cars gauge and computer are not accurate. Im just looking at the temps provided to me from these 2 items.

I had heard on some vehicles p3 displays ambient instead of IAT. This is the only scenario I can imagine you are seeing here. Are you reading ambient off the cluster? Reason being there is a temp sensor mounted on the crash bar directly in front of the FMIC... Maybe that is the temp input your gauge is reading?


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[slowone11]

So it was 67-68 degrees this morning on my way to work. This is not "WOT" but under load as i stated....sorry for the crappy video.
https://youtu.be/rtJppbwMZ2E

[dscline]

Something is wrong with the way the P3 gauge is showing IAT. It's impossible to cool the air to below ambient with a straight air-air heat exchanger, and it's very difficult to even get it within several degrees. Here are context.eax's results comparing the stock, 3.0TDI, and Unitronic ICs, at 18°C ambient. The best the best one of the three could do was 20°F above ambient, at it's coldest point.

[boomtime]

So it was 67-68 degrees this morning on my way to work. This is not "WOT" but under load as i stated....sorry for the crappy video.
https://youtu.be/rtJppbwMZ2E

Thats gotta be reading ambient... Reason being when I hit boost even on part throttle my IAT can jump about 10 degrees instantly.
Either you have a bad sensor or something with it reading ambient instead of the IAT in the charge pipe... I think on B8 A4 IAT is at the MAP sensor near the driver side on the J pipe that comes up from the IC

[slowone11]

Eh im not worried about it. Its a badass Ic and it is doing its job. Id get this one over all others. [Mic drop]

[blbroo]

So at stop light idle the iat is about 10 over ambient temp. Under load it drops to either even with ambient or a couple degrees under. I tried to record it but there was to much glare. It was 90 out and cruising temps tend to be about 5-10 degrees over ambient depending on what my rpms are. If im in 6th and not on throttle its 10 over....if im in 5th and light throttle its 5 over. Man i love seeing these temps. With my stock ic i was getting upwards of 120-130 at cruising in 90+ degrees ambient.

When stopping at a light, the IC isn't providing any cooling and your IAT should go significantly up. If you P3 was reading ambient, it could go up at a stoplight because of the extra stagnant heat from other cars and the road surface.

I will post my log from this am. Air temp was 75-77 and my IAT on the highway was around 82 then jumped to 108 when I parked and let the car run for a couple of minutes.


RPM is on the right axis.

Speed and IAT are on the left axis

The temp in my garage was 89, and I had the car running a few minutes before logging (with the garage door open)



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[John@Unitronic]

Something is wrong with the way the P3 gauge is showing IAT. It's impossible to cool the air to below ambient with a straight air-air heat exchanger, and it's very difficult to even get it within several degrees. Here are context.eax's results comparing the stock, 3.0TDI, and Unitronic ICs, at 18°C ambient. The best the best one of the three could do was 20°F above ambient, at it's coldest point.

Those are some positive results! Agreed that you're not going to get sub-ambient temps out of an air to air unit. Here is the data that my colleague David and I collected during the final validation testing of our Intercooler Upgrade for the B8/B8.5 A4/A5 2.0 TSI AVS. All testing was done using our B8 A5 development vehicle and performed at a local race track here in Quebec. All data was collected on the same day, starting with the OEM intercooler DAQ. Temperature probes were tapped into the inlets and outlets of both the OEM and Unitronic Intercooler Core end tanks. Ambient temperature varied slightly throughout the day between 23-27 degrees Celsius (73-81 degrees Fahrenheit). Testing procedure consisted of three consecutive laps around the circuit with both Intercoolers (OEM and Unitronic) to collect inlet and outlet air temperatures.

Despite the ambient and intercooler inlet air temperature rising, our Intercooler provided significantly lower outlet temperatures consistently throughout the hot laps around the circuit, proving that our core can maintain efficiency and resist heat soak, unlike the OEM unit.







The graph below shows the air temperature delta of the inlet and outlet temps of both the OEM and our unit. Once again, despite the higher ambient temp during the runs using our Intercooler, and increased inlet temperatures, our Intercooler provided significant reductions in outlet air temperatures resulting in a cooler, denser charge air being ingested by the engine, resulting in increased performance. It’s resistance to heat soak means that the core retains its cooling abilities, even though the most rigorous of conditions.



If anyone has any questions, please let me know!

[S4_SH1640]

I just learn that the A7 3.0TDI 313hp stock IC might fit on our A4 B8.
Here is a picture of an A4 B8 with the A7 3.0TDI IC installed. Price on this IC is about $500 ish.

Can anyone direct me to a website where I can buy this intercooler. Searching by part number : 8K0 145 805E is coming up to the IC with the plastic ends. Im looking for the IC that is shown in this photo.

[Lambda13]

Can anyone direct me to a website where I can buy this intercooler. Searching by part number : 8K0 145 805E is coming up to the IC with the plastic ends. Im looking for the IC that is shown in this photo.

Instead of paying $500 for an A7 intercooler check this one:

http://www.maperformance.com/product...s_ABoCFW3w_wcB

Can be found on eBay for the same or less shipped. It's what I have and I love it.

[blbroo]

Instead of paying $500 for an A7 intercooler check this one:

http://www.maperformance.com/product...s_ABoCFW3w_wcB

Can be found on eBay for the same or less shipped. It's what I have and I love it.

+1

[S4_SH1640]

Instead of paying $500 for an A7 intercooler check this one:

http://www.maperformance.com/product...s_ABoCFW3w_wcB

Can be found on eBay for the same or less shipped. It's what I have and I love it.

wow good flow rate. good price too. hows the fitting? being 28.5 inches long and 11 tall. any issues? would appreciate some photos.

[zokissima]

For those of you with the Treadstone IC, what mounting hardware did you have to pick up? How did you mount the unit?

[Lambda13]

wow good flow rate. good price too. hows the fitting? being 28.5 inches long and 11 tall. any issues? would appreciate some photos.

It fit perfectly. You can mount it to the crash bar. I used an L bracket on the side and a t bracket underneath the crash bar.



I'll try and snap a photo tonight. It gets dark really early so it's hard for me to get home in time.

[S4_SH1640]

It fit perfectly. You can mount it to the crash bar. I used an L bracket on the side and a t bracket underneath the crash bar.



I'll try and snap a photo tonight. It gets dark really early so it's hard for me to get home in time.

thanks man.

by the way, run it through the car wash for me lol

[blbroo]

It fit perfectly. You can mount it to the crash bar. I used an L bracket on the side and a t bracket underneath the crash bar.



I'll try and snap a photo tonight. It gets dark really early so it's hard for me to get home in time.

Besides the L brackets, you just need two silicone elbows, two 2.5" pipe pieces and some hose clamps to have a killer sub $300 intercooler setup.

[Lambda13]

thanks man.

by the way, run it through the car wash for me lol

That was some time ago, clean now!

[zcspec]

Lamdba13's mantra is GO BIG OR GO HOME!

The other option is the smaller TR8 which a few of us run. It's sitting in my garage just waiting to be installed.

[lettuce]

For the sake of posterity, here is a copy of a post I made in my build thread of logs I pulled from my Treadstone TR8 FMIC setup. It cost me under $300 and I ran a 12.6 @ 107 with it:

Ran some logs today for a top secret project. I've been meaning to check out my IATs since installing the new Treadstone TR8 intercooler, so I made some graphs I thought you guys might be interested in as well. Ambient temps were around 80 degrees F, so around 26 C.

2nd gear pull:


3rd gear pull:


Max temps in the 2nd gear pull were only 33 degrees C while staying pretty much steady between 30 and 32 during the entire pull, actually getting colder at higher RPMs. That's 6-10 degrees F over ambient through the entire RPM range at 20-23 PSI.

Max temps in the 3rd gear pull hit 35 degrees C, rising from a baseline of 30 C. The temps stayed steady until 5k RPMs at which point they rose to 35 and then quickly dropped to below baseline (29 C) when letting off the throttle. That's 6-15 degrees F over ambient through the entire RPM range at 20-23 PSI.

Pretty damn impressive performance from a $250 intercooler.

And here is a link to my post detailing the install:

http://www.audizine.com/forum/showth...1#post11043526

[boomtime]

For the sake of posterity, here is a copy of a post I made in my build thread of logs I pulled from my Treadstone TR8 FMIC setup. It cost me under $300 and I ran a 12.6 @ 107 with it:





And here is a link to my post detailing the install:

http://www.audizine.com/forum/showth...1#post11043526

Good use of vocabulary.
Does that make 12.6 your best ET?

[lettuce]

Good use of vocabulary.
Does that make 12.6 your best ET?

Yes. Best and pretty consistent too, once I figured out how to properly launch the thing getting 1.80 60' times.

That is, until the track opens up for the season again in a few months.

[Smellie]

Yes. Best and pretty consistent too, once I figured out how to properly launch the thing getting 1.80 60' times.

That is, until the track opens up for the season again in a few months.

Nice!

Where did you end up buying it? Did you price match like Brian did?

[lettuce]

Nice!

Where did you end up buying it? Did you price match like Brian did?

I just bought it straight from the site he used to price match. Probably won't install it until winter's over though, no point really.

[S4_SH1640]

For the sake of posterity, here is a copy of a post I made in my build thread of logs I pulled from my Treadstone TR8 FMIC setup. It cost me under $300 and I ran a 12.6 @ 107 with it:





And here is a link to my post detailing the install:

http://www.audizine.com/forum/showth...1#post11043526

Maybe i missed it somehere in your install but can you use stock hoses fort he TR8 IC? Stock is 2.5 inches correct?

And good info on your thread, nice build!