APR Presents: APR B8 3.0 TFSI Supercharger Coolant Performance System

[Arin@APR]

APR B8 3.0 TFSI Supercharger Coolant Performance System

Product Page

APR is pleased to present a completely reengineered supercharger Coolant Performance System (CPS) for the Audi B8 3.0 TFSI. Through extensive motorsport testing in GRAND-AM Road Racing, APR's Engineering Team discovered the OEM supercharger cooling system was inadequate at higher boost pressures and power levels and therefore developed the APR CPS to improve both performance and reliability.

Performance
Compressing incoming air such as all superchargers and turbochargers do to deliver increased volumetric efficiency and thus more power at every point of combustion creates heat that must be properly cooled again prior to entering the cylinders. Most all automotive enthusiasts have experienced this with even normally aspirated cars whereas in the cool winter days our cars clearly perform better than in the hot summer months. When increasing engine power or during spirited driving, and especially during brutal motorsport racing, the OEM supercharger cooling system quickly becomes taxed, creating a loss of engine performance.

Reliability
Heat is a major concern regarding the health of your engine and APR pays close attention to reliability. The engine's ECU takes many steps to reduce power output when temperatures rise, however it can only go so far. By reengineering the supercharger cooling system, APR is able to not only keep performance consistent but also ensure your engine is more reliable by having done so.

Following APR's mantra of "Performance Without Compromise" APR's Engineering Team left no stone unturned in the quest to deliver a completely reengineered performance cooling system. The APR CPS consists of three major components:

Coolant Separation Reservoir


Coolant Pump


Coolant Radiator


APR CPS - Coolant Separation Reservoir
Audi chose to directly tie the supercharger cooling circuit into the engine cooling circuit to achieve a greater volume of coolant and ease of service. Unfortunately, engine coolant temperatures can easily soar beyond 100c which results in less ability to aid in cooling the dual air-to-water intercoolers located in the supercharger manifold.



By separating the engine and the supercharger cooling circuits, coolant temperature drops significantly which yields a 6% cooler intake air temperature (IAT) during back-to-back pulls. This, however is only the first step in solving the cooling inefficiency as increasing the volume of coolant is necessary to ensure repeatable performance.

The main centerpiece to the Coolant Separation Reservoir is a CNC machined overfill reservoir. The reservoir is e-coated black and proudly displays the APR Logo. This small addition to the engine bay is both visually appealing and functional.

Photos
Kit
Installed
Installed 2
Logo Detail

APR CPS - Coolant High Flow Pump



The ability for the dual air-to-water intercoolers to reduce intake air temperature depends heavily upon the system's ability to pump fresh coolant through the intercoolers and out to a front mounted radiator. APR's engineers selected a pump capable of flowing significantly more than the OEM coolant pump. The result was a 48% flow increase which when combined with the Coolant Separation Reservoir dropped IAT's 11% over stock.

The upgraded pump is an unobtrusive and out of sight addition, as APR's engineers have created higher than OEM quality brackets and wiring harnesses to seamlessly connect the pump to the factory wiring system and chassis without any interference with existing components.

Kit
Pump

APR CPS - Front Mount Coolant Radiator


Properly functioning air-to-water intercoolers rely heavily on the temperature of coolant flowing through the system. Increasing the volume of coolant and increasing the surface area of front mounted radiators significantly reduces coolant temperature. With an increased volume of coolant, coolant takes longer to warm and with an increased surface area, coolant temperature is reduced at a more rapid rate.

The APR Front Mounted Radiator towers over the 5.5 inch tall OEM radiator and stands 17 inches tall in comparison. This massive increase in size results in a much larger coolant capacity and a 138% increase in frontal surface area. When combined with the APR Coolant Separation Reservoir and APR Coolant Pump, IAT's dropped significantly, resulting in a 23% decrease during brutal testing. The result is power that remains consistent pull after pull even with almost no time to cool down between runs.

Photos
Kit
Installed
OEM vs APR
Radiator Front
Radiator Side


Testing Data
Grueling, six run, back-to-back dyno pulls were conducted with the APR CPS and OEM coolant systems to measure intake air temperature in the most demanding environments. During testing, starting intake air temperature was brought to 37.5c (99.5F) before conducting each dyno pull. Each dyno pull was also a full 21 second sweep with only 5 seconds of cool down time between runs.

The differences were immediate and exactly as expected. After only the very first pull, the stock system's intake air temperature at redline jumped 47% and by the sixth pull, was 56% hotter than the starting temperature. After only the third pull, intake air temperature was above 80c (176F), resulting in the boost pressure bypass valve opening on demand of the ECU, reducing boost pressure in an effort to protect the engine.

The APR CPS controlled intake air temperature during every dyno pull with a small increase in temperature by the sixth consecutive run. After the first dyno pull, intake air temperature was 15.5c (60F) less than stock. By the sixth run, intake air temperature only increased 10c (50F) more than the first run and was 20c (68F) less than stock after the sixth run.

Power was impacted greatly by rising IAT's. The APR CPS showed roughly a 10 AWHP deviation from the first run to the sixth run while the stock system lost over 50 AWHP by the final pull. The APR CPS increases engine reliability and increases repeatability by controlling intake air temperature. It's Performance Without Compromise only APR can deliver!


Graphs


More Graphs
IAT at the beginning and end of each run
Boost compensation based on IAT
Pump Comparison

Power Graphs


More Power Graphs
First run dyno Comparison
Stock - 1st run vs 6th
Coolant Separator - 1st run vs 6th
Coolant Separator & Pump - 1st vs 6th
Coolant Separator & Radiator - 1st vs 6th
Coolant Separator, Pump & Radiator - 1st vs 6th

Application Guide

Fits all B8 S4/S5 3.0 TFSI Engines with 6MT or S-Tronic.

Full System
MS100029 - MSRP: $1,999.00 SALE: $1,799.10 - APR Coolant Performance System

Individual Components
MS100026 - MSRP: $299.00 SALE: $269.10 - CPS - Coolant Separation Reservoir (Only)*
MS100027 - MSRP: $899.00 SALE: $809.10CPS - High Flow Coolant Pump (Only)*
MS100028 - MSRP: $1,099.00 SALE: $989.10CPS - Front Mount Radiator (Only)*

*The APR CPS is designed as a complete engineered solution, however each system can be purchased and installed independently.

Available at APR dealers around the world and at waterfest!

GOAPR!

[AudiA4_20T]

now you can throw some ice in that spare reservoir at the track!

[Arin@APR]

Maybe 2 or 3 cubes but you could always use the system to fabricate a larger tank in the available space . ;-)

[You-S4-It]

Sweet. Any installtion instructions?

[Deckdout2]

Damn you people!

:LIKE:

[Arin@APR]

Sweet. Any installtion instructions?

Printed and included in every box.

The electronic copy is on another engineers computer and he's at waterfest. I can get it on line when he returns.

[PsYkHoTiK]

I did notice at the track (lapping day) that the car wasn't "going" as fast as it should at times mid session. Haha I remember at least one instance where I was flooring the accelerator, but I was wondering "hmm, why aren't you flying off car?" hahaha!

One thing though, it would be nice if you included some sort wire mesh so that customers could install that and protect their new cooling investment. Most already know that the stock heat exchanger is at risk of small rocks sending it to it's untimely demise.

Something like this (above and below the plate holder):


Picture from dr bryan (but I've done the same on the bottom half). It would be nice to have the wire mesh to protect one's investment (false sense of security or otherwise).

[Kay15]

So installing just the seperate resivour would also help in cooling? Yikes I did not think cooling would be so $$ .. more of my money already spent haha ...

[Deckdout2]

Is it possible to request the radiator to be delivered black coated? Whether paint or of another coating?

[blackESfour]

ORDERED!!!!! I LOVE YOU GUYS!!!

[Arin@APR]

Is it possible to request the radiator to be delivered black coated? Whether paint or of another coating?

We could possibly look into this but it would increase cost and lead time.

you don't want to simply paint it or it will not preform very well.

It's also very subtle, but you can notice it if you are looking for it.

[primetime]

Arin, Thanks for the update... Why such a small reservoir? Space is limited but you guys could have went much bigger... So with all parts it is a closed loop system with the HE, pump and reservoir, and IC's correct? Doesn't that decrease the total amount of coolant in the system vs using the shared coolant from the radiator, given the size of the expansion tank vs the new reservoir? HE is the bomb! Pump seems to be much more high flowing over the stocker... can it support additional volume, if say I plumed into the windsheild washer reservoir? I just sent the ECU and I know your busy with WF so I will call you next Monday/Tuesday and hopefully a kit will be available... Not sure about the reservoir at this point but in for the pump and HE... Great work as always... Can't wait to get the tune back Tuesday! Also, got a DIY job on the install of this new mod? Thanks Ron

[Deckdout2]

We could possibly look into this but it would increase cost and lead time.

you don't want to simply paint it or it will not preform very well.

It's also very subtle, but you can notice it if you are looking for it.

I'm glad you mentioned that. I wouldn't have thought about it and sprayed away, but then again that would have defeated the purpose of the radiator doing it's job as assumed.

[FattyK]

Arin,
How's the installation?
Can diy or need professional help?
Thx

[leviathan18]

amazing gains specially the how it holds the temps at the end, it must be a very efficient core to move that amount of heat out of the loop

aluminium?

row or bars?

that pump looks like an iwaki (care to share which pump is? and if its 12v)

[jeffc31337]

I like that since it's a coolan to air cooler, unlike turbos use, no worry about boost loss from the bigger cooler. Very nice. Seems like the separator + radiator is a good bang for the buck. Do you have any data on JUST the radiator since it is available separately?

How difficult is it to install the coolant separator?

[ENV²]

I want this.....

[WhoS4]

I like that since it's a coolan to air cooler, unlike turbos use, no worry about boost loss from the bigger cooler. Very nice. Seems like the separator + radiator is a good bang for the buck. Do you have any data on JUST the radiator since it is available separately?

How difficult is it to install the coolant separator?

Hi Arin,

Outside of the clear cooling advantages of running all 3 pieces of the solution together, is there anyother downside to just running the separator/pump or separator/radiator combo, and then adding the 3rd piece at some later time?

[NWS4Guy]

Scott already addressed my question - any ideas on protection for he HE? You can CLEARLY see from the shots you took comparing the size of the stock and APR, as well as what the stock ancilliary cooler look like from road debris - I would not want my APR to be looking like that.

Granted, I have my personal DIY screen, which will still work with this thankfully!

[YZracer]

I WANT THIS and since I'm moving to Phoenix, summer temps upper 115+ F, I NEED this! lol

[throwaway1]

Any chance you can tell us how much that radiator weighs? Anybody know what the stock one weighs?

[K1speeder]

Great work guys! You just continue to impress. Put in an order already I wish I had it for drag runs tomorrow though.

[Ynnekdude]

Arin, you know what I'm going to ask... it wont fit, will it?

[NWS4Guy]

Arin, you know what I'm going to ask... it wont fit, will it?

LOL, I would be it will, unless the clearance between the front aluminum low speed bumper and your nose is too shallow.

[sciblades]

pardon my ignorance but why wouldnt you just run meth at a fraction of the cost? you could even do an aqua mist setup for half the price

[NWS4Guy]

pardon my ignorance but why wouldnt you just run meth at a fraction of the cost? you could even do an aqua mist setup for half the price

Meth uses evaporation to try to cool the air. You inject the meth before or at the throttle body - BEFORE the air is compressed and heated. The intercooling removes the heat from the air AFTER it has been compressed and the additional heat added.

The laws of thermodynamics dictates what is most efficient, and you cannot move heat to a place which already has more heat (unless you involve pressure which is how A/C and Heat Pumps work). Since the larger delta will be the temp of the air that has already been compressed over what is entering the intake and throttle body, you will see far greater improvements in heat removal by addressing the air which is at it's hottest and removing from there.

[Arin@APR]

Meth is a temporary solution. This is there every time you drive the car.

You don't want to spray meth into your supercharger. Also, liquid doesn't compress. Not a good idea.

[windyctyaudi]

ok this may seem like a dumb question but do you have to buy all of the compnents for this to work or can you just buy some separate and they will work with out the full result. the reason i am asking is because I noticed they are for sale individually.

[windyctyaudi]

ok nevermind my last question i see there is the whole kit and then you can buy them individually too.

[Arin@APR]

Last line

[L0U]

What other mods on the test car? the stock curve looks to fall off like unchiped.

[Arin@APR]

Stock curve falls off because it was run 6 with only 5 seconds between runs. Ecu protected the engine.

[Pgr1990]

When my car gets in (should be by the end of this week I can't take the anticipation anymore) I am doing just the pulley and tune. Do you think I should spend 2 grand and get the whole setup or will the reservoir and pump be sufficient enough to cool the engine with the stock intercooler. I don't plan on tracking or beating the car up, mostly highway driving, but if I do these mods I want to keep it on the safe side and make sure I have the proper cooling. I don't know much about cooling systems and if I don't necessarily have to spend 2 thousand for the whole system that would be nice. So let me know in your opinions the route you think I should go. Thanks.

[Eweezy27]

Average installation timeframe for an authorized shop for the whole kit? Just looking for a ballpark figure as I might pick up one of these on Saturday to go with my pulley :)

[Stereodude]

It's nice to see APR coming out with mods for the B8 S4, but I think temperature data for back to back to back to back 1/4 mile runs would be much more useful. A car on a dyno doesn't get a comparable amount of airflow to one actually moving down the road. This mod could look great on a dyno, but be fixing a problem that doesn't really exist on the road.

[blackESfour]

So what seems to be on the graph is a 50+ hp increase? someone correct me if im wrong. if it is, thats witha stock car?? no other mods?

[SM_ATL]

It's nice to see APR coming out with mods for the B8 S4, but I think temperature data for back to back to back to back 1/4 mile runs would be much more useful. A car on a dyno doesn't get a comparable amount of airflow to one actually moving down the road. This mod could look great on a dyno, but be fixing a problem that doesn't really exist on the road.

I personally have very little expertise in this, but I have seen dyno setups that simulate the airflow as well (putting large variable speed fans in front of the car). It would be interesting for APR to explain what they did.
Nevertheless, even is the temperature increase on the road would not be as high as on a dyno, the APR system would also benefit from higher airflow and deliver better performance.
Correct me if I am wrong...

[GTSurgery]

So what seems to be on the graph is a 50+ hp increase? someone correct me if im wrong. if it is, thats witha stock car?? no other mods?

No, pretty sure, (if it's their white S4), the car has a tune, pulley, intake, exhaust. Stock refers to the stock cooling system. It's not a 50 hp increase necessarily. It's preventing a 50 hp decrease in hp because of heat soak? Feel free to correct me if I'm wrong.

[GTSurgery]

Don't know a ton about cars so excuse my ignorance, but will this improve the longevity of a tuned or stock engine? I don't track my car or take it to the drag strip. Occasional spirited driving (little more than occasional), but otherwise it's my DD. I love this car and plan to keep it for awhile. If this will improve the longevity of my car, it's a no brainer to get this. If it's more about just increased performance for the track or strip, I'll probably pass. Edit to note that I do live in South Georgia where my car temp reads over 90 close to 3/4 of the year.

[PsYkHoTiK]

It's nice to see APR coming out with mods for the B8 S4, but I think temperature data for back to back to back to back 1/4 mile runs would be much more useful. A car on a dyno doesn't get a comparable amount of airflow to one actually moving down the road. This mod could look great on a dyno, but be fixing a problem that doesn't really exist on the road.

I believe that their dyno is in an enclosed chamber that is kind of like a wind tunnel (could be wrong).

On the track (on a lapping day), I did experience at times where the car wasn't pulling as hard. I recall at least one or two times where I looked down to the instrument cluster and prodded with my foot to recheck to see if I was flooring it. I was pushing it quite hard (lol ~6MPG hard). And there was a ton of heat on my engine/supercharger after every session. (keeping in mind I have the ECU tune and the supercharger pulley that makes it spin faster - hardly has a "cooling" effect)