OEM Cooling versus Revo Charge Cooler with Unitronic Dual Pulley Race File....

[bhvrdr]

I had the opportunity to do some testing on the OEM upgrade charge cooling that I did versus the Revo charge cooler.


SETUPS:

OEM+ Setup: This is the the B8.5 OEM dual pass center heat exchanger with the added B8 side mount heat exchanger. This was performed on 2/23/2017 at approx 6:11pm. DA was approx: +1542 with an ambient temp of approx 74 degrees F.


Revo Charge Cooler: This is the Revo center heat exchanger with the B8 side mount heat exchanger setup as a divorced system running 95% water and 5% coolant. This was performed on 2/25/2017 at approx 3:59pm. DA was approx: +1842 with an ambient temp of approx 83 degrees F.


Both sets of runs were performed on the same tank of approx 96-98 octane mix of Shell 93 and Sunoco 100 octane fuel.

PHOTOS:

The core of the Revo charge cooler measures 22.1 inches Wide x 17.15 inches Tall x 1.6 inches Deep






RESULTS:



SUMMARY:


The results have been consistent on back to back runs now. The Revo charge cooler is performing significantly better than the OEM setup.

Over a full 3rd gear pull the rise in IAT for the stock setup was a total of 25C. It rose from 49C to 74C.

Over the same 3rd gear pull in worse ambient conditions, the rise in IATs for the Revo Charge cooler was a total of 14C. It rose from 45C to 59C.

Timing was also increased from a max of 23.25 on the stock cooler setup to 25.5 degrees on the Revo charge cooler setup with no other changes made to the programming, fuel quality, or vehicle and under worse ambient conditions.

Overall i'm extremely pleased with this setup. If anything I went in with a bias that this may not have been a very good bang for the buck purchase but it has exceeded my expectations significantly. This would be my second purchase after tuning and a pulley.

[fitzydude]

Excellent results!! Does the Revo system come divorced or did you divorce it yourself?

[bhvrdr]

It comes as a divorced setup. I contemplated testing it divorced versus integrated but I wanted to go swimming today so I decided to only pull it apart once and just went divorced.

[rtl5009]

Damn that timing curve is predictable and steady.

[protogeoff]

Thanks for all the hard work. It's nice to see a result with so few variables and a clear result.

V1Rotate

[theweebabyseamus]

Another great comparison. Thanks for the info.

[Loe]

Mike, timing looks healthy and strong with the addition of the intercooler. What Lambda does the Uni-tronic file run?

[Hofahome]

hmmm, makes me wonder just how well my setup works. my theory is that it is probably better than your prior setup as my extra HE is subject to airflow, but your new setup does show more of a difference that I would have thought.

[carlitod87]

Just clarification, did you run the same mix 95% water and 5% coolant for both logs?

[bmoreS4]

Does this have its own pump? Doesn't it need one if it a divorced system?


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[xpoweruk]

Looks like the Revo HX works quite well.

[bhvrdr]

Thanks fellas. yes im real happy with it

hmmm, makes me wonder just how well my setup works. my theory is that it is probably better than your prior setup as my extra HE is subject to airflow, but your new setup does show more of a difference that I would have thought.

i bet yours works very well.

Just clarification, did you run the same mix 95% water and 5% coolant for both logs?

I was on a 30% mix prior. yes adding more water should have impacted water temps a bit.

Does this have its own pump? Doesn't it need one if it a divorced system?




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the electric pump is used for the sc loop. the water pump remains used for the engine cooling

[bmoreS4]

Oh ok, is that how it is already in stock form?


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[bhvrdr]

Mike, timing looks healthy and strong with the addition of the intercooler. What Lambda does the Uni-tronic file run?

very similar to revo and giac curves which are similar to stock but a bit more enriched.

check this log out. i had 10 miles left on the trip computer til empty and filled with 93. maybe i had a max of 95 octane in the car for this run

https://drive.google.com/open?id=0B2...nhzbEtOdlNMcXM

[bhvrdr]

Oh ok, is that how it is already in stock form?


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yup, this just cuts the connection between them.

[bmoreS4]

yup, this just cuts the connection between them.

Ok, that's what I was thinking. The revo kit seems like a good deal.


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[RLB6]

very similar to revo and giac curves which are similar to stock but a bit more enriched.

check this log out. i had 10 miles left on the trip computer til empty and filled with 93. maybe i had a max of 95 octane in the car for this run

https://drive.google.com/open?id=0B2...nhzbEtOdlNMcXM

Car appears to be happy with that mixture. Hitting 22*, slight knock corrections but overall good. The Uni DP file is still BETA, correct?

[bhvrdr]

Yeah still beta. John mentioned he is going to try and get his car on their maha to finalize production. I hate to guess when though

[Loe]

very similar to revo and giac curves which are similar to stock but a bit more enriched.

check this log out. i had 10 miles left on the trip computer til empty and filled with 93. maybe i had a max of 95 octane in the car for this run

https://drive.google.com/open?id=0B2...nhzbEtOdlNMcXM

very cool, yeah I see that it targets that .78-.79 lambda after 5,000 rpm. A nice strong timing profile to allow for a clean burn, looks like you coud have hit 26.-27* up top if you erase a few of those ignition corrections (I'm only assuming based on cyl 1 corrections since I can't see the other cylinder, and you hitting 25.175* up top). If so, it would look similar to my GIAC, and to APR's DP file, so John definitely made a strong race profile for the masses right out of the box, and may have been stronger than Rob's initial runs when he ran 11.55 months back. It'll hit some pretty nice 1/4 mile times without questions for sure

[bhvrdr]

Thanks for taking a look.

That log is from the 24 degree file too. There is the 26 degree file that I ran before with the 100 octane. Whats weird is that this 24 degree file I decided to just try with the full tank of 93 octane that had maybe 1 gallon of 98 octane left in the tank in it. Maybe i'm running 95 octane max? and the log seems to have no prob showing 22-24 degrees or so max timing. Just interesting is all. I'll be going back to a 20 degree file on the 93 octane anyways but interesting. I'll log the 24 degree file again once I burn through a couple tanks to make sure it is 100% 93 octane. This damn cooler is working great though. 60C max IATS when its 80F ambients. I used to see 84C max before the OEM upgrade and then 74C max after that. I strongly suggest folks go to running straight water with water wetter too and maybe a splash of coolant. ... if you are in non freezing climates that is ;)

Mike

[Dippy]

Great info. If I need extra cooling in the future then the Revo system will be most convenient for me.

[Loe]

Thanks for taking a look.

That log is from the 24 degree file too. There is the 26 degree file that I ran before with the 100 octane. Whats weird is that this 24 degree file I decided to just try with the full tank of 93 octane that had maybe 1 gallon of 98 octane left in the tank in it. Maybe i'm running 95 octane max? and the log seems to have no prob showing 22-24 degrees or so max timing. Just interesting is all. I'll be going back to a 20 degree file on the 93 octane anyways but interesting. I'll log the 24 degree file again once I burn through a couple tanks to make sure it is 100% 93 octane. This damn cooler is working great though. 60C max IATS when its 80F ambients. I used to see 84C max before the OEM upgrade and then 74C max after that. I strongly suggest folks go to running straight water with water wetter too and maybe a splash of coolant. ... if you are in non freezing climates that is ;)

Mike

Nothing weird, IMHO that's plenty of octane to hit that target (**disclaimer** if the tables are set the same way as GIAC, I'm only making an assumption). Can't wait until you hit the track, should produce a strong run out of the box if you try that 26* file as well.

on a side note, I've read of people using the water wetter and having gumming issues, something to consider down the line. I use an 80/20 water/G13 mix, that alone I saw a nice drop of 5*C across the board versus using 100% G13

[bhvrdr]

thanks loe. I remember with G12 folks would get "blobs" in the coolant. It looked like a lava lamp kind of. I hope this is a non issue with G13. I'll be on the lookout. I'll have to read up if switching completely to a dexcool type product would negate this and be ok.

mike

[cjw]

Question... This looks just like the APR/PLM unit as well, but I've seen pics of those where the lower connection is on the left and upper is on the right. Does it matter or make a difference or is the design significantly different while looking the same?

[FromRagsToS4]

I'd love to see some comparisons between this setup and the APR $1000 HX.

[bhvrdr]

Good questions. A heck of a lot in design of coolers goes unnoticed to the untrained eye like mine. One thing to notice is that this revo unit looks to be bar and plate to me while the awe and old apr/plm units look like tube and fin. I could be wrong but thats what it looks like on inspection. Those two designs will behave differently. Now as to the differences on how our s4 offerings behave, thats a great question and no one has done a showdown which wouldnt be easy to do. Wed need folks with identical power mods and cooler mods in the same place to test.

Here is a little apr article on bar/plate and tube fin... it is about their air to air intercooler that is bar and plate but its still interesting...

https://www.goapr.com/products/intercooler_b8.html

[xpoweruk]

Just a little conformation about the Revo cooler

Yes, it's a Bar & Plate design, designed and tested by Luke in house at Revo HQ on our Mustang Dyno and on track at Bruntingthorpe Proving ground - Real world testing, as with all Revo products.

[bhvrdr]

Just a little conformation about the Revo cooler

Thanks bud! Yeah it really is a nice setup. Still have ta say it was one of my favorite mods

[QuattroJ]

Old thread, put do you happen to know how many pass the Revo is?

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