S6 MercRacing Heat Exchanger Tested in my Audi B8 S4
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- čas přidán 19. 01. 2021
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If there is one thing that my B8 S4 does well, it is generate heat!!! This is the hottest running car I have ever owned. Now that my car has a Stage 1 - 93 octane tune on it from Integrated Engineering it creates even more heat! I picked up a MercRacing S6 Heat Exchanger rather than your standard S4 model. I performed before and after testing to see just how well the heat exchanger actually works and I was impressed!!!
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Thanks for watching!!!
Website: vancityaudi.com/
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#MercRacing #HeatExchanger #B8S4 - Auta a dopravní prostředky
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Wow, awesome video! I was actually waiting for you to do this upgrade. I had never seen IAT data for Merc Racing, so thank you for that. So, now it is time for dual pulley, 80 mm throttle body, ported blower and test pipes ;-) I finally ordered APR CPS after driving 18 months with DP on stock cooling. Never measured IAT's, but ouch can imagine what they have been like in the summer. I will do some logging before and after and will share.
Thanks for watching and I'm glad I could help
As always quality content 👍👍👍👍
Thanks
thanks for your work! I enjoy every video.
Thanks for watching!
@@VancityAudi I wonder why your channel has so few subscribers. People who do something themselves and share their observations and data analysis can be counted on the fingers. Especially when all the improvements are done on a dyno - just bravo. I follow your channel, it's a pity someone only recently got on it. I wish you success in our difficult task:) is the porting of the compressor and the test on the stand worth the wait?
@@user-zl1jv2zv6r I don't pay for ads. I don't give away money, I don't do stupid pranks. That's my guess on why I don't have more subscribers hahaha.
Not sure I understand about the compressor question though. What do you mean exactly?
@@VancityAudi I'm sorry, I use a translator because I'm not strong in English. do you plan to do compressor porting and test it on the strip and on the dyno?
@@user-zl1jv2zv6r that's okay. If you're referring to this car, I've already sold it and moved on to a 2018 Audi S4 now.
Great vid!
Thanks!
Having the front end off was the perfect time to do the pulleys!
And would have completely defeated the purpose of the video
Great video appreciate it
You're welcome. Thanks for watching.
Thanks for putting together this awesome video! Thanks for the pro tip on weight savings by removing the rear head rests! Doing that mod next for sure.
Hahaha, I don't remove the rear head rests for weight reduction. I do that so I can see out of the back window easier.
There's couple other things you can do to improve your IAT's and recovery time. Mostly get rid of the second restrictive heat exchanger and clean your lines up like how it is on the B8.5
Thanks for the tips! We'll look into it
Other mods or changes would be cwa100 but the PWM signal won't work so pump will be 100% all the time and you don't need 50/50 coolant mix in Vancouver. I can share a datazap with you showing deltas of 35c on a PR of 3.48.
Very interesting. We'll be looking into a lot of fun stuff down the road and may consider these mods as well.
Quick question Brian, where can I find more information about cleaning up the lines?
@@performancebuilds1323 Quick question Brian, where can I find more information about cleaning up the lines? Tag @Roberto Garcia as well.
NICE!!! Now I feel confident taking my Audi apart a bit to install one of these heat exchangers, thx a ton. After this what’s the next best upgrade?? I’m trying to get as close as possible to 550hp.
These do not make any power. They simply help your car not lose power so rapidly when it heats up. A porter supercharger plus every single bolt on part Integrated Engineering offers would be the way to go.
Awesome video thanks! Always appreciate your insight and data-based comparisons. Question - which grill brand is that? Looking to replace my factory one…. I have a 2010 S4 b8
(Btw, you got me hooked on IE! Went stage 1 w air intake and now sizing up stage 2 w pulley and heat exchanger. Ayeeeeee!)
I honestly can't remember for the life of me what brand that front grill was, sorry! Hopefully you're remembering to use promo code VANCITYAUDI at www.performancebyie.com/vancityaudi to save some money!
No worries. I’ll keep looking around. Gives the car a nice facelift ;) Thanks for the code reminder. I feel like I’d tried it when I went stage 1 but the IE’s site didn’t take it. Nonetheless still great product at relatively good pricing for the quality you get. Thx again for all the awesome content!
@seguindaniel you're very welcome. I know that the code was deactivated during the Black Friday sale, so if you tried to use it then, it wouldn't have worked.
Cool. I’ll make sure to give it another go.
@seguindaniel apparently right now it isn't working, but they'll get to fixing it this week.
I know its been a while since install. Where did you mount the aftermarket pump? Thank you in advance, thanks for the informative videos.
In the exact spot that the OEM pump was located.
Ooooof yeah i need that. P.S. my bank acct says stop making videos bc every time you upload I find something new to spend $ on 😅
Lmao. My apologies to your bank account
It’s gonna suck taking all of that apart again but I guess it’s gonna be worth the data
It's all about the data and helping others by sharing what I find.
great video as always, one thing i need to ask about merc racing heat exchanger which is huge and isnt that blocking the radiator behind as oem was very short and might affect the temp of ECT.
Definitely a question to ask MercRacing directly. I never thought of this to be honest and I'm not sure that it would be an issue
Do you have a link to that elbow piece of hose you had to buy or is there are part number? Very clean install!
It's been a long time since we did this install, but I think it might be this: mercracing.net/shop/s4-b8-a6-a7-c7-audi-heat-exchanger-convenience-install-pack/
@@VancityAudi That looks like it would work. Thank you!
This is what I'd expect from MercRacing. Do you have a comparison for IAT recovery?
In an upcoming dyno video I made it put in work.
@@VancityAudi great. That’s really important information. Allowing you to do runs back and forth, without much concern over heat soak. Great work with the video. subscribed 👊
@@reesescars6871 thanks for watching!
Why merc racing HX? just out of curiosity. There’s also PLM and ECS. What’s the best for the HX? Dual pass, triple pass, or quad pass?
When I think of going fast I don't think ECS. PLM was never on my radar to be honest. I had never heard of them before. I had read reviews on people using the Merc unit with success and liked that his products are used in a ton of racing applications from other platforms as well. As for what is best? Dual, triple or quad pass that is beyond my technical know how and wouldn't be able to answer that, sorry
How did you go about bleeding the system off after refilling with coolant? Were there any special bleed screws that needed to be opened or do you bleed off of the heat exchanger?
You bleed off from the new heat exchanger as well as on the supercharger itself from what I remember.
Dam I just noticed I put my coolant tubes on different 🤦♂️I got the loop one on the bottom and the driver side on top.
To be honest I've seen a ton of people plumb theirs the same as you have.
they say 1celsius is around 1hp gained. also less strain on the engine. nice work.
I've never heard of that hp vs degree gain before. Very cool!!!
I literally think no one says that lol.
@@RSX250 Well now you have, you’re welcome. Lol
I was expecting more of a drop for such an increase in cooling capacity... which leads me to think there may be other areas in the system creating a bottleneck? i don't know how the system all works on that s4 so I could be very wrong.
Some other viewers have pointed out some flaws in the rest of the system so there is more than likely more room to improve once those changes have been made.
Needs pump upgrade and velocity ap coolant crossover replacement upgrade maybe even delete the small auxiliary cooler by headlight . Also change to hard fittings to increase pressure at joints
I fitted my heat exchanger on the weekend but I didn't have a gap have the gap like yours did, it was pretty close to the other radiator... Does it matter? Cheers
You'd want a little bit of a gap for better airflow.
I'm pulling timing in my SQ5 cant wait to get this. Anyone know the difference between the original version and the new sold out version of the heat exchanger? B6 S4 was the hottest car I've ever owned.
Pulling timing due to excessive heat or simply due to poor fuel quality or not high enough octane?
@@VancityAudi heat from pulls
@@matthews6216 so your IAT'S are skyrocketing and the only ignition reduction you are getting is at high rpm's when your temperatures have increased? You don't see any ignition reduction when your car is cooler in 1st, 2nd and 3rd gear?
@@VancityAudi I have no data to really repond fully to your question i'm only going on feel and what my tuner told me. For the most part all is well but i want to cool things down since ill be going stage 2 soon
@@matthews6216 I have no doubt that you need a heat exchanger to help with your IAT's. I'd simply suggest you log your car to find out if your fuel quality is up to par as well. You'd be amazed at how straight pump gas doesn't meet the demands of many tunes and you may be experiencing timing reduction due to poor fuel quality.
Installing a smaller pulley would have been easy when you had the front end apart lol.
And that would have defeated the entire purpose of the video
Ahahahahahaha
Yeah I get it one thing at a time. I’m an Audi technician so I’d do as much as I can when possible. I’m not as patient and methodical as to are :)
@@evanpennington8553 if I was in your line of work I'd think the exact same way! Haha
I was thinking the same thing
One day you will look back at this vide and go... Damn... I should've installed dual pulley while that rad support was out.....
I most certainly won't, lol. That would have completely defeated the purpose of this video
@@VancityAudi Dual pulley and HX go hand in hand with that car. It's just inevitable you will do it. Just don't go crazy on lower pulley.. 184ish is big enough for that car. If you think it sounds crazy, wait till you hear it when DP. ;)
@@SRTst I personally think a HX goes hand in hand with being stock, lol. These cars run so stupidly hot. Just neutering performance non-stop form crazy high IAT's. I can't even imagine what they would be like on a dual pulley setup with no upgraded HX
@@VancityAudi Yea can't do dual pulley without one. Recovery is also amazing with that HX. So you can do more runs.. But those cars are super sensitive to IATs BEFORE launch. It can pull crazy timing right out of the hole if your initial IATs are too high.. So if you're just idling in the pits before the run it really hurts them on track. Electric fans on demand (max cool mode) would do wonders on that platform. Also glad to see they added vent at top of the HX for bleeding. Those coolant refill kits that use venturi effect work AMAZING on those cars too. Well worth $100 investment!
034 Tune has ‘Max Cool’ mode. Fans and charge cooler pump both on 100% DC for queuing and staging. Auto off at double digit speeds.
Question? Why did you select MercRacing exchanger, rather that 034Motorsports or ECS heatexchangers? Thanks in advance.
I'll never put an 034 part on my cars. I don't agree with their business practices. The last company I think of for performance is ECS. MercRacing has a great price point and I did some research showing other people had success with their unit.
@@VancityAudi Thanks for the response. I have several of 034 products on my 2015 S4. What business practices of theirs is flawed. Based on your answer maybe take my business else where.
@@johnjuarez8005 when I was researching which company I wanted to go with for this build I had multiple people inform me of the crap morals and ethics that they had as a company. In the past they have encouraged some extremely shady marketing and promotional tactics in my eyes. I never want to be involved with or support a company that is okay with being deceitful.
@@VancityAudi hmm first I have ever heard of this. What about APR?
@@matthews6216 best get to researching then. There have been some super shady business tactics over the past few years that I want nothing to do with.
Is this that big of a difference?? I feel like it’d be better if you get an whole inter cooler setup?? I also have a b8 and am trying to figure out which route to go. I’ve built a fare amount of computers n 10 degrees Celsius doesn’t seem like that much
This is a heat exchanger, not an intercooler. I'm not sure I understand what you mean by "get a whole intercooler setup". These motors are water cooled not air cooled like an intercooler. 10 degrees IAT drops from one piece of hardware is a great decrease in temps.
@@VancityAudi love. Sorry for the lack luster question and thank you for the knowledge. I figure no question is a bad question
@@mingobeats8465 always happy to help
Where are the mercracing heat exchangers made and what is the warranty? Thank you? Also when you’re drilling holes in your vehicle what’s keeping it from rusting? Or are the new heat exchangers mount it in a way that you’re not damaging your vehicle any longer?
Perhaps these questions are better suited for Merc Racing directly? Feel free to email them and see what they can tell you about their product.
Vancity Audi I have 2x. No answer.
@@mtnbikerva1 Well that sucks. Do they have a phone number you can call? I have no idea where they are made and what the warranty is, so I'm of no use to you there.
As for drilling holes in the car, they are simply in the back of your crash bar, like I show in the video. You aren't damaging the vehicle.
@@VancityAudi so the crash bar is made out of a material that does not rust, or creat a stress riser by drilling?
@@mtnbikerva1 I have absolutely no idea. No one has ever cared to ask or inquire before about causing stress on the crash bar from drilling some holes into it for the upgraded heat exchanger, lol. I believe the crash bar is aluminum so no, it won't rust.
Any issues with the self tap screws into the crash bar? Have they ever failed or backed out ?
Sold the car some time ago, but from what I know, the new owner never had a problem with it.
@@VancityAudi awesome thanks, man love the Chanel. Never thought I’d be basing my data off another Canadian it’s refreshing 👍🏻
@Zen Motorsports Media no problemo! Thanks for watching!
Is that elbow that you needed because it's a B8, rather than a B8.5? I think there's some minor plumbing differences, and I wanted to check.
To be honest I'm not 100% sure but I think the main plumbing difference between the 8 and 8.5 is the additional heat exchanger on the driver side front that came with the 8 was removed with the 8.5. I think you need that elbow for both models. Writing or calling MercRacing would probably answer that for ya.
Yes. On the B8.5 both coolant lines are on the drivers side of the car so you don't need to route anything behind the heat exchanger.
@@AudiC7Owners Thanks, just in time too... My CWA100 comes on the 6th... They've been backordered so this is a 3.5 month thing lol
@@CZcamsHandlesAreStupid No problem. It makes recovery (if paired with a good Heat Exchanger) extremely fast. Make sure you verify your wiring harness is pinned correctly before installing it.
@@AudiC7Owners I'm in that Audizine thread with you, so I've been watching. I have the S6 HX from Jose awaiting install.
does this fit my audi s4 b8 2009 with ADS cooler
I don't know, sorry. I'm not sure how much room an ADS cooler takes up or whether this would fit a 2009. I was under the impression that B8's were 2010 - 2012.
I know this is a year ago but did you change your pipes around and see what the different temps was again as your pipes was the wrong way around?
We ended up leaving them the way we had installed them and never had a problem. My tech refused to switch them around because he believed he was right in the way he installed it, and everyone else was wrong 🤣
@Vancity Audi oh ryte on your video the oem lowest inlet was passenger side (left hand drive) and once new one was on the passenger pipe connects to the highest outlet. Awesome videos though loved all the s4 content as a fellow s4 driver 😀
@@chrisrichmond233 thank you. I'm glad you're enjoying them
@@VancityAudi OK but WHY does your tech say he’s right and everyone else is wrong? If he’s so knowledgeable then the rationale should be something others could agree has merit. If you’re not trying to be a credible Audi enthusiast then fine, but I’m pretty sure that’s your whole shtick. But just saying “because the tech told me to do it that way” at best suggests you don’t really understand the 3.0 V6 platform
@@andrewheilman8744 Not sure if you meant to sound like you are "calling me out" or not but that's the way I read it, lol. I said what I said because I don't remember his exact rationale and didn't want to misguide someone if they take my comments literally. He said something along the lines of the flow of the coolant that people had explained was wrong and that he believed it was flowing differently, so he left it connected the way he had set it up originally. Seeing as I suffered no ill effects and my system cooled well we never changed it and he believed he was correct. I'm not the technical guy, he is. I'm not a mechanic, he is. I don't perform the work on my cars, that is his part of our partnership. I film, I edit, I drive, I pay for everything. He has an extensive mechanical knowledge base surrounding Audi's and VW's so when he suggests we do something a certain way, we do. 95% of the time it works out really well for us.
Do u still have urs and howmuch for ur stock heat exchanger im in michigan
$100USD plus whatever the shipping cost is
@@VancityAudi For a stock exchanger? Wowza.
You know what they say, the bigger the heat exchanger, the smaller the pulley... at least they should.
lol, I like that
Would this fit the b8.5 s4 ?
Yes, it would fit the same as it did on mine
How long did the install take?
This was shot 3 years ago, so I can't be certain. Considering we also repaired the rad support, it's impossible for me to say how long it would have taken to just do the heat exchanger upgrade.
Do it fit in the SQ5?
I'd email or call MercRacing to find out
it runs hot cause they slammed a sc v6 in a a4 😕
What size is that elbow?
It's been a long time since we did this install, but I think it might be this: mercracing.net/shop/s4-b8-a6-a7-c7-audi-heat-exchanger-convenience-install-pack/
Your stock delta was 21C whereas the Merc delta was 19.5C, with the ambient being 1C colder, I only see this HX giving you 0.5C?
You see this very differently then I do then
@@VancityAudi I’m not denying a larger HX can be required. Just the data you provided only shows a colder starting temp. The increasing delta of temp from start of you run till end was a mirror image for both units.
@@christopheredgett4919 How do you think I attained that colder starting temp though? The DA, the ambient temp and my driving previous to filming was virtually identical from my baseline run to my run with the Merc HX. The unit itself provided me with nearly 10 degrees cooler temps to begin with which created a 10 degree cooler operating temp. It continued to keep the car 10 degrees cooler throughout the entire run compared to the OEM unit seeing as my peak temps were nearly 10 degrees cooler as well. That's a whole lot of me writing 10 degrees lol. That's the way I see it at least.
@@VancityAudi do you believe more air surface area cools when the vehicle is not moving..or would you believe adding more volume of liquid would help a starting temp be reduced. If the increased air surface area helped in any way, why is the increasing temperature delta the same as stock?
The volume of coolant to absorb the heat, the surface area to dissipate and the increase in flow from the reduction in pressure all contribute to the improvements. The delta is not the measure here; average temperature/reduction is, 10 degrees across the board is very good.
Also bear in mind the true bottleneck is the small charge air coolers inside the supercharger.