IAT and Engine Coolant Temps

[audis4culver]

Ok.. have scoured the forum to try to find a consolidated thread listing IAT and Engine Coolant Temps - none to be found.
Anyone interested in keeping a running list of everyone's temps? I would be interested in seeing stock temps vs kit temps and then kits with tuned cars.

Mine: (these would be averages)
Engine Coolant : 205F IAT: 34C Ambient 50F Running: Stage II GIAC with non-divorced PLM Kit and reservoir. AWE S-Flo intake

[oohnoo]

Funny I tried searching for coolant temps also now that I installed the PLM and for the life of me couldn't find what the thermostat was rated at. But I'm same as you at 205°F
Have to check AIT to see where I'm at.

[xpoweruk]

Engine coolant : 94*C
IAT : 32*c
Ambient : 11.5*C

OEM cooler with uprated Jaguar cooler stacked(not divorced) & OE pump mod,Revo stage 1+

[Works2shoot]

I wish this thread was here a while back when I thought my car was running too hot!

During this past Winter -

While driving around town I'm 203F for coolant.
While driving on the highway I'm 205-207F for the coolant.

I'll check the IATs.

[bhvrdr]

Engine coolant : 94*C
IAT : 32*c
Ambient : 11.5*C

OEM cooler with uprated Jaguar cooler stacked(not divorced) & OE pump mod,Revo stage 1+

Did u change hx from the mercracing hofamod one? Tell me more please

[xpoweruk]

http://www.audi-sport.net/xf/threads...g-mods.287647/

We considered it first,Hoffa did it first ;)

97-06 Jaguar XJR XKR uprated chargecooler radiator

[Hofahome]

http://www.audi-sport.net/xf/threads...g-mods.287647/

We considered it first,Hoffa did it first ;)

97-06 Jaguar XJR XKR uprated chargecooler radiator

I owe my inspiration to xpower. He was the first to bring up the whole stacked idea. My system is still working well btw.
Oh and in the future Xpower, don't post things in metric. Us 'mericans have no idea what it means and we refuse to learn the standard of the rest of the world.

[k9lovr]

Mine usually sits at 194 according to my P3....I have the AMS kit

[audis4culver]

Keep them coming ... plain and simple post the numbers... lets get some averages so we can see what's out there stock vs kits.


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[Loe]

cool thread

Datalogging from a few nights back:

Engine Coolant 93*C (199.4*F)
IAT 24.25*C (75.65*F)
Ambient 68*F

vehicle speed = 55mph (I think this is important to note as well, it plays a big factor in our IAT's)

Set-up: AWE pump, AWE reservoir, KillerChiller refrigerant liquid-to-liquid HX, front mount HX delete.

[cjw]

I bought the PLM exchanger, which I believe is the same as the APRs. Curious how just a heat exchanger affects the IATs or if trying to stack if has value.

[bhvrdr]

It's hard because we need to kind of break this down into maximum IATs and then specify such as max during wot third gear run.

The reason I say that is because intake Air temps are all over the place. They will be different in second gear versus third gear. And they'll be way different going wide open throttle versus cruising.

For example I may have 40 Celsius intake temps cruising at a hundred miles per hour in Top Gear. But I may have 70 degrees Celsius intake Temps doing 5 back-to-back third gear pulls. So people posting their random intake Air temps unfortunately won't mean anything. Engine coolant temp should not be very much so it's kind of a non variable.


My current data is that on the Stock B 8.5 heat exchanger I was able to torture test the intake temperatures up to 84 Celsius. That's on an 80 degree Fahrenheit day and 5 consecutive back-to-back pulls in 3rd gear with no cooldown.

Now that I added a small side mount heat exchanger I've been able to get the temps up to about 74 Celsius and that was doing about 10 back-to-back pulls which is quite a few more than I did with the baseline testing. When I just do 5 back-to-back pulls which is my normal test it only gets up to 70 Celsius now. So I'm seen roughly a 10 degrees Celsius Improvement.

One thing that I'm really liking though is that now when I look at my logs on just standard 93 octane I'm getting up to 22 degrees of timing. This is up about two to three degrees from when I was running the single heat exchanger.

[cjw]

I doubt I'd ever be torture testing this, nothing beyond a track day which would be a single 1-4 gear pull. I do want to keep shit safe though 90 is about the hottest it gets here, but 80 is more common in summer.

[audis4culver]

It's hard because we need to kind of break this down into maximum IATs and then specify such as max during wot third gear run.

The reason I say that is because intake Air temps are all over the place. They will be different in second gear versus third gear. And they'll be way different going wide open throttle versus cruising.

For example I may have 40 Celsius intake temps cruising at a hundred miles per hour in Top Gear. But I may have 70 degrees Celsius intake Temps doing 5 back-to-back third gear pulls. So people posting their random intake Air temps unfortunately won't mean anything. Engine coolant temp should not be very much so it's kind of a non variable.


My current data is that on the Stock B 8.5 heat exchanger I was able to torture test the intake temperatures up to 84 Celsius. That's on an 80 degree Fahrenheit day and 5 consecutive back-to-back pulls in 3rd gear with no cooldown.

Now that I added a small side mount heat exchanger I've been able to get the temps up to about 74 Celsius and that was doing about 10 back-to-back pulls which is quite a few more than I did with the baseline testing. When I just do 5 back-to-back pulls which is my normal test it only gets up to 70 Celsius now. So I'm seen roughly a 10 degrees Celsius Improvement.

One thing that I'm really liking though is that now when I look at my logs on just standard 93 octane I'm getting up to 22 degrees of timing. This is up about two to three degrees from when I was running the single heat exchanger.

All i was hoping for.. is for people to simply post their numbers.. nothing complicated. It gives us less informed folks an idea of what's out there. Just post the numbers.. 50 mph cruising. Do them consistent so there is a control. 3rd ..50mph. No need for wot. What is the average number just cruising - stock vs kit. This should give everyone a base line and hopefully provide info on how much someone can improve over stock and Stock with a tune.
I have gotten tons of emails about people just being curious of where the temps are in general. Stock vs kits. A plm or awe kit stacked in front of the stock engine he is showing to raise the engine temps just by its location alone - which prior to my install everyone was telling would not happen.Those are the things i am generally interested in. Just trying to keep it simple but input of how to make it most beneficial to all is foremost. I can start a spreadsheet if we can get some stock numbers to compare to.


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[audis4culver]

All i was hoping for.. is for people to simply post their numbers.. nothing complicated. It gives us less informed folks an idea of what's out there. Just post the numbers.. 50 mph cruising. Do them consistent so there is a control. 3rd ..50mph. No need for wot. What is the average number just cruising - stock vs kit. This should give everyone a base line and hopefully provide info on how much someone can improve over stock and Stock with a tune.
I have gotten tons of emails about people just being curious of where the temps are in general. Stock vs kits. A plm or awe kit stacked in front of the stock engine he is showing to raise the engine temps just by its location alone - which prior to my install everyone was telling would not happen.Those are the things i am generally interested in. Just trying to keep it simple but input of how to make it most beneficial to all is foremost. I can start a spreadsheet if we can get some stock numbers to compare to.


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Dont take my post as negative either.. i am a novice and really look to the experts for their advice. If this thread is of no use or not measurable then please we can toss it and get back to driving.


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[bhvrdr]

Dont take my post as negative either.. i am a novice and really look to the experts for their advice. If this thread is of no use or not measurable then please we can toss it and get back to driving.


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I hear what you're saying. I know what you're after but unfortunately Gathering it while cruising just isn't going to help you at all. The car runs nice and cool when there's no load on it and there's plenty of air flow flowing over the front end. So whether you have a big huge heat exchanger or a factory heat exchanger it's going to be running nice and cool temperatures compared to when it's under stress. so you want to know how it performs when you're accelerating hard and when you're sitting heat soaking and then trying to recover from that heat soak. And by the way I do totally agree with you that would be awesome information to get people to contribute

[abamfo]

I don't have exact figures for you but this is aroudn what I have been seeing recently and it is hot and humid down here in Australia and I think my intercoolers are leaking coolant

Engine Coolant 90-95*C
IAT 32.5-40*C (around 12.5-17.5*C above ambient)
Ambient 20-25* C

Vehicle speed = 100kmph (60 mph) | highway cruising

Set-up: OEM b8.5 heat exchanger, OEM pump, KillerChiller refrigerant unit (AWE seperate reservoir is on order as I believe that I need to divorce the system with this setup).

[Mat@1975]

It's hard because we need to kind of break this down into maximum IATs and then specify such as max during wot third gear run.

The reason I say that is because intake Air temps are all over the place. They will be different in second gear versus third gear. And they'll be way different going wide open throttle versus cruising.

For example I may have 40 Celsius intake temps cruising at a hundred miles per hour in Top Gear. But I may have 70 degrees Celsius intake Temps doing 5 back-to-back third gear pulls. So people posting their random intake Air temps unfortunately won't mean anything. Engine coolant temp should not be very much so it's kind of a non variable.


My current data is that on the Stock B 8.5 heat exchanger I was able to torture test the intake temperatures up to 84 Celsius. That's on an 80 degree Fahrenheit day and 5 consecutive back-to-back pulls in 3rd gear with no cooldown.

Now that I added a small side mount heat exchanger I've been able to get the temps up to about 74 Celsius and that was doing about 10 back-to-back pulls which is quite a few more than I did with the baseline testing. When I just do 5 back-to-back pulls which is my normal test it only gets up to 70 Celsius now. So I'm seen roughly a 10 degrees Celsius Improvement.

One thing that I'm really liking though is that now when I look at my logs on just standard 93 octane I'm getting up to 22 degrees of timing. This is up about two to three degrees from when I was running the single heat exchanger.

Impressive results Mike !

It seem you achieved 75% of the results of an aftermarket Charge cooler with 10 % of the cost !!

Smart !!

Best

Mathieu

[xpoweruk]

Here is a a graph I did when testing my stacked heat exchanger.
It is a 2nd,3rd,4th gear pull so 30-120 or so MPH
The outside temp was 21*C (69.8*F)
Starting IAT was 33.75*C(92.75*F)
IATs' maxed at 51.75*C (125.15*F) @ 6,660 RPM
I didn't log engine temp though

[bhvrdr]

Brilliant graph man. Nice results!

[Hofahome]

Decided to post my results. I wish I would have logged this before I switched to DP, because I think DP is a HUGE factor in my IATs. It's amazing how fast they climb at WOT. I am running 91oct right now, not e85.
OP, from what I have seen on my car, cruising IATs will be around 40F +/- 5F higher than ambient.

https://docs.google.com/spreadsheets...it?usp=sharing

[bhvrdr]

Decided to post my results. I wish I would have logged this before I switched to DP, because I think DP is a HUGE factor in my IATs. It's amazing how fast they climb at WOT. I am running 91oct right now, not e85.
OP, from what I have seen on my car, cruising IATs will be around 40F +/- 5F higher than ambient.

https://docs.google.com/spreadsheets...it?usp=sharing

That's great information there too. Thanks for posting it. Sometimes I wonder if my car would be faster at a 3.0 pulley ratio as opposed to the 3.17 pulley ratio.

[cjw]

What seems to be a well managed temp on dual pulley? Mid 60's?

Seems like 80 is a torture test on stock cooling. It's that considered dangerous or just performance robbing? Just trying to gauge where I might be with just a heat exchanger.

[xpoweruk]

Anything over 60*C & you start to lose power I think IIRC Loe noticed this during DP testing

[Mat@1975]

I was thinking to this:

I really think that IAT when cruising @ 50 mph will be always a little more than ambiant temps, regardless of stage of tune or charge cooler configuration.
At this speed, there is quite no load, you don't use the supercharger and the bypass valve is wide open. After traveling in the air filter and inlet hose, the air goes directly in the engine via the bypass valve... no travel throug scrolls nor internal heat Hx...

BR

Mat

[Mat@1975]

Anything over 60*C & you start to lose power I think IIRC Loe noticed this during DP testing

Yes,

Past 60°C, ECU switches to more conservative timing tables
Past 80°C, ECU starts to open the bpcv to cool down iat.

BR

Mat

[bhvrdr]

Here are logs from today. It was 77 degrees F out at that time.

These are three back to back runs.

I am on 100% pure 93 octane fuel, not even octane booster and my timing is up to 22 degrees now. This setup feels pretty good right now. I still need to divorce the system but I'm trying to find the largest reservoir I can pack in right now.

https://drive.google.com/open?id=0B2...lNuTExob0NHWEE

Mike

[xpoweruk]

Pretty good looking IATs' considering the size of the HX.Just need a stacked or larger main & they will be great.
That should help with the knock too

[abamfo]

Here are logs from today. It was 77 degrees F out at that time.

These are three back to back runs.

I am on 100% pure 93 octane fuel, not even octane booster and my timing is up to 22 degrees now. This setup feels pretty good right now. I still need to divorce the system but I'm trying to find the largest reservoir I can pack in right now.

https://drive.google.com/open?id=0B2...lNuTExob0NHWEE

Mike

Hi Mike,

I like the look of your figures for your investment so far. Looks like it's pushing around 16-16.5 PSI of boost? Can I ask what your pulley ratio is now. That might be the sweet spot from a timing and IAT perspective

I run a 3.21 ratio and struggle to get that timing unless it's around 15-20* C outside

[bhvrdr]

Hi Mike,

I like the look of your figures for your investment so far. Looks like it's pushing around 16-16.5 PSI of boost? Can I ask what your pulley ratio is now. That might be the sweet spot from a timing and IAT perspective

I run a 3.21 ratio and struggle to get that timing unless it's around 15-20* C outside

I'm on a 3.17 ratio. I hit probably somewhere around 19psi-20psi. I have to estimate. The tune will request 1.25 max... usually around 1.2bar. The bypass opens on that. then i keep the bypass closed with CW which will give low boost readings. Somewhere over 18.5psi anyways.

Right now the investment is very low. I actually have a smaller camaro reservoir packed away somewhere from when i upgraded mine. should fit perfectly. gotta go looking through boxes. grr

[tars9]

I have the PLM setup on EPL stage II. Coolant normally sits between 199 and 205. Usually sitting at 203. Been doing some logging and IATs still climb crazy fast. Even in cold Chicago winter.

Also, my car keeps telling me I'm low on coolant. Even though I'm not. Anyone else with PLM set up having this problem?


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[bhvrdr]

What do your IATs max out at?

mike

[lowjonathan]

Here are logs from today. It was 77 degrees F out at that time.

These are three back to back runs.

I am on 100% pure 93 octane fuel, not even octane booster and my timing is up to 22 degrees now. This setup feels pretty good right now. I still need to divorce the system but I'm trying to find the largest reservoir I can pack in right now.

https://drive.google.com/open?id=0B2...lNuTExob0NHWEE

Mike

following for more info on reservoir to divorce the system

pls let me know what is the biggest reservoir to fit in constraint area

thanks

[rwtzero]

Per P3: Coolant: 200-205

GIAC Stage 2 with pulley
GIAC DSG Tune

[bhvrdr]

following for more info on reservoir to divorce the system

pls let me know what is the biggest reservoir to fit in constraint area

thanks

Let me tell you i'm having a heck of a time. I think I may have to have something custom made. Theres a reason APR and AMS use the drivers side of the car to mount their reservoirs... and they mount them below the SC... the worst place you could when it comes to getting air trapped in the system. They dont do that out of preference. They do it bc thats where they have space.

I want a bottle higher up though so bleeding is a breeze. grrr. I'm going to keep messing with it. If I have to go custom i'll let people know so maybe we can get a group buy.

Mike

[xpoweruk]

40MPH


70MPH

[Mat@1975]

Hello,

Here is the IAT during a sort of 1/2 mile event with 50 km/h Rolling start. WOT 2-3-4 and a little of 5
Ambient temp was around 55°F (12°C)



Will do the same again, with and without the AMS/Alpha cooler

Cheers,

Mat

[bhvrdr]

Hey Mat and X how do you guys get those pretty graphs? I do them in Excel but it takes forever. Do you guys have a program that cheats for you. Thanks. Mike

[Mat@1975]

Hey Mat and X how do you guys get those pretty graphs? I do them in Excel but it takes forever. Do you guys have a program that cheats for you. Thanks. Mike

No, Mike... unfortunately, it takes me forever... ;o)

Cheers !

Mat

[xpoweruk]

I upload the log to Google drive,then open in sheets.You can then select the columns you want to graph & it is done in a few clicks :)

The below image is your 3 runs bhvrdr


and a comparison between yours & my IATs'
I'm revo 1+ though & you are DP