IAT and Engine Coolant Temps

[Strong Man]

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

Does it happen with stock ECU only or with tuning SWs(APR, Uni etc.) as well ?

[Mat@1975]

It's more or less the same thresholds stock or tuners +- 5°C
IMO


Envoyé de mon SM-G850F en utilisant Tapatalk

[Strong Man]

Hi Mat ,

Thanks for your replay. I've just installed P3 and have started to follow IAT.

[sirsycott]

is it normal to see the IAT slowly climb a degree or two after letting off throttle and just coasting to a stop light?

i just barely started noticing since my p3 is now correctly reporting this with the update

i can sit at stop and go traffic and see anywhere between 32-36 iat depending on how long i'm sitting at it it'll peak off at 40 if i've been just sitting in the car idling for 10 minutes on a hot day , but when i'm on the freeway and cruising it's down at 29-30c range

[rgvsq5]

is it normal to see the IAT slowly climb a degree or two after letting off throttle and just coasting to a stop light?

i just barely started noticing since my p3 is now correctly reporting this with the update

i can sit at stop and go traffic and see anywhere between 32-36 iat depending on how long i'm sitting at it it'll peak off at 40 if i've been just sitting in the car idling for 10 minutes on a hot day , but when i'm on the freeway and cruising it's down at 29-30c range

Dafuq... what's ambient? 50*F?

It's mid-90s where I live and lowest I see cruising is 49*C with it climbing to 60*C at long stoplight. Slow stop and go traffic it sits at 52-54*C.




Sent from my iPhone using Audizine

[sirsycott]

Dafuq... what's ambient? 50*F?

It's mid-90s where I live and lowest I see cruising is 49*C with it climbing to 60*C at long stoplight. Slow stop and go traffic it sits at 52-54*C.




Sent from my iPhone using Audizine

ambient is 59-63 recently =)

also i have an AMS cooler, so i think that helps a little

but earlier in the week, during lunch time when it was 90F, my low sitting point was closer to 50C idling at a stoplight, stop and go hovered around 40-45c, free way heading home was around or between 35-40c

[bhvrdr]

ambient is 59-63 recently =)

also i have an AMS cooler, so i think that helps a little

but earlier in the week, during lunch time when it was 90F, my low sitting point was closer to 50C idling at a stoplight, stop and go hovered around 40-45c, free way heading home was around or between 35-40c

I was curious about your signature as it says you have a giac stage 3+ with tvs1940. What is this?

[Strong Man]

ambient is 59-63 recently =)

also i have an AMS cooler, so i think that helps a little

but earlier in the week, during lunch time when it was 90F, my low sitting point was closer to 50C idling at a stoplight, stop and go hovered around 40-45c, free way heading home was around or between 35-40c

Guys , why you're mixing F with C all the time...it drives my crazy :))))

[bguild]

I would like to hear from others running the MercRacing front mount, preferably with a divorced setup. Is 140-160 F a good charge air cooler temp reading using a CWA50 pump?

[ThoseRings]

I would like to hear from others running the MercRacing front mount, preferably with a divorced setup. Is 140-160 F a good charge air cooler temp reading using a CWA50 pump?

uh...you bumped a thread that is damn near 8 years old...

[Slvrbul8]

I would like to hear from others running the MercRacing front mount, preferably with a divorced setup. Is 140-160 F a good charge air cooler temp reading using a CWA50 pump?

I think that would depend on ambient temps. Also, are you at highway speeds seeing 140-160?

[bguild]

Yes, highway speeds as well. And re: the thread age, you must be aware that B8 Audis are now like 14 years old. Is there some rule here where a person can't search for an old topic and reply to it? LOL

[Slvrbul8]

Yes, highway speeds as well. And re: the thread age, you must be aware that B8 Audis are now like 14 years old. Is there some rule here where a person can't search for an old topic and reply to it? LOL

No,lol. You can bump any thread. imo it keeps relevant info together and make's it easier for others searching info in the future.

[Slvrbul8]

140-150 at highway speeds crusing is higher than I've ever seen in my car. My IAT's are usually between 90-105F depending on the season. I easily see those numbers on a hard pull though.

[Fresh.S4]

I would like to hear from others running the MercRacing front mount, preferably with a divorced setup. Is 140-160 F a good charge air cooler temp reading using a CWA50 pump?

I started with Merc v1 hx + divorced + cwa50s @100%,, I always maintained a 20f above ambient highway cruising and around 20-30f in the streets. Winter, summer; didn't matter here in Cali. (Even when it was 100f).
Then added the Vap ports + an additional cwa50s pre hx,, temps would stay between 18-25 above ambient. Winter, summer didn't matter.
Then I swapped to the big boy Merc hx and utilized both lower inlets and now I'm down to like 12-15f above ambient. Winter tested so far. Even on those random 80-90f days we've randomly had it still doesn't go past 20f.

Your 140-160 is waay too hot. Especially you being in the NE.
You've got air in your system. Possibly your pump isn't working well.

[bguild]

Fresh S4, great reply. Thank you. I'm aware there is an issue... just trying to figure out if it's pump issue or air. I took the bleeders off the SC cores and there is no fluid in there. Would air in the system literally prevent the pump from pushing fluid?

[Fresh.S4]

If you can pull back your d/s fender liner, or better remove your front bumper, the pump is easy enough to get your hand on it to check it. If your wire isn't cut to run it 100%, I think you can have someone in the driver seat and slowly rev it, to increase the pumps speed (someone correct me).

Now if the car is on and you opened up the bleed screws and no fluid is being pushed out, that leads me to believe the pump isn't on.
If you had a big air pocket, I think it would occured in the hx.