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Old 03-16-2016, 10:30 AM   #21
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Originally Posted by slmhofy View Post
Really though, is 180F not feasible for a heat soaked intercooler, on track @ 20psi?

I feel like that could be possible especially if ambient temp is 80-90 outside.

Or still would that just implicate a crappy intercooler?

It's feasible, ez, go slap on a MSM IC.

but if those temps are accurate, I think it's time to look into a more efficient core/system for that particular setup. I wouldn't be quite happy with a core that can get so heatsoaked that it loses that much cooling efficiency.
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Old 03-16-2016, 11:48 AM   #22
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Old 03-16-2016, 12:00 PM   #23
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Vlad,

That's great and all and does look like a super efficient intercooler setup. But just going by the picture, that looks like it could have just been a simple 1-2-3 gear pull on a nice cooler 78f day.

Put that car on the track for a 20 minutes session and then the results would be more applicable.
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Old 03-16-2016, 12:04 PM   #24
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Originally Posted by nitrodann View Post
It was 95f, 22psi.

I can't answer any of your questions but id like to.
Last time I measured my IAT at the track, I got it up to 160f @ 14psi and it was also probably 90f ambient air temp. Temp sensor end of my larger crappy ebay intercooler.

This was at AutoClub Speedway where there's a front straight you can go full throttle for probably 10 seconds in 5th or 6th gear. That builds a lot of heat in every system (turbo, coolant, oil, etc). My IAT was highest consistently at the end of this straight.

At the time I had my oil cooler in front of my intercooler and have since moved it.

Didn't get around to logging last time I was out, but I'm sure it's better.
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Old 03-16-2016, 01:39 PM   #25
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Quote:
Originally Posted by slmhofy View Post
Vlad,

That's great and all and does look like a super efficient intercooler setup. But just going by the picture, that looks like it could have just been a simple 1-2-3 gear pull on a nice cooler 78f day.

Put that car on the track for a 20 minutes session and then the results would be more applicable.
I'll find more relevant logs, but IMO the post IC AIT's should not be hovering at 180+ with a proper (non-ebay) core and sufficient (properly ducted) airflow.

But I'm no trackday bro so I'm not 100% sure what is normal on track. Just sharing data
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Old 03-16-2016, 01:40 PM   #26
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We need Savington in here with Theseus logs.
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Old 03-16-2016, 01:41 PM   #27
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he had a precision core with decent ducting so yeah
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Old 03-16-2016, 01:51 PM   #28
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Theseus ran max IATs of maybe 30*F over ambient doing 20 minutes of 4-5-6 pulls in 100*F weather. I doubt your IATs are actually 180*F.

I'm with Braineack, though. Putting your IAT sensor in the coldside pipe behind the radiator is an awful idea and I don't understand why anyone does it. Move it to the coldside IC endtank where it belongs.
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Old 03-16-2016, 01:58 PM   #29
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Old 03-16-2016, 02:00 PM   #30
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Originally Posted by Savington View Post
Theseus ran max IATs of maybe 30*F over ambient doing 20 minutes of 4-5-6 pulls in 100*F weather. I doubt your IATs are actually 180*F.

I'm with Braineack, though. Putting your IAT sensor in the coldside pipe behind the radiator is an awful idea and I don't understand why anyone does it. Move it to the coldside IC endtank where it belongs.


Got that same intercooler headed my way.
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Old 03-16-2016, 02:07 PM   #31
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Quote:
Originally Posted by Savington View Post
Theseus ran max IATs of maybe 30*F over ambient doing 20 minutes of 4-5-6 pulls in 100*F weather.
I've asked before, but will you post a datalog showing this?
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Old 03-16-2016, 02:12 PM   #32
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I think I still have a datalog of Splitime's 1/4 drag pull.

as he goes through the gears his AITs get cooler than when he started.
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Old 03-16-2016, 02:15 PM   #33
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Quote:
Originally Posted by Braineack View Post
I think I still have a datalog of Splitime's 1/4 drag pull.

as he goes through the gears his AITs get cooler than when he started.
That's not possible (the air getting colder when you go in boost). That would mean his intercooler is over 100% effective.

But I've seen this before on my car. Heat soak raised the temps of my air going into the intake manifold at low speed (charge pipe between intercooler and intake manifold heat soaked bad) so AITs dropped when going into boost. This is why I run my AIT sensor close to the intake manifold, so it actually measures the temperature of the air going into the engine. Sticking it in the intercooler exit tells you the air temp exiting the intercooler, sure.
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Old 03-16-2016, 02:27 PM   #34
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well it just means his ait was a little hot in staging.

iirc his ait was screwed into his IM.


here's one:
Attached Files
File Type: xls datalog200809211714.xls (397.8 KB, 25 views)
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Old 03-16-2016, 02:50 PM   #35
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Originally Posted by patsmx5 View Post
I've asked before, but will you post a datalog showing this?
Sure, just as soon as you dyno your car.
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Old 03-16-2016, 03:06 PM   #36
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well played
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Old 03-16-2016, 04:01 PM   #37
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Sure, just as soon as you dyno your car.
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Old 03-16-2016, 05:17 PM   #38
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Its a slow corner big straight track with an average speed of 80mph and a top speed of 150 in this particular car.

It really sounds like the right place for iat sensor is in the inlet manifold.

The end tank location is to prevent heatsoak?

Comments?
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Old 03-16-2016, 05:19 PM   #39
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end tank is best for everything
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Old 03-16-2016, 05:32 PM   #40
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Quote:
Originally Posted by nitrodann View Post
Its a slow corner big straight track with an average speed of 80mph and a top speed of 150 in this particular car.

It really sounds like the right place for iat sensor is in the inlet manifold.

The end tank location is to prevent heatsoak?

Comments?
Do you want to know the air temp coming out of the intercooler? If so, absolutely put sensor in end tank of intercooler to measure that.

Moving a sensor does not actually prevent the charge pipes/intake manifold from heat soak. That's going to happen no matter where the sensor is.

The sensor location will change what temperature you measure (air temp pre-turbo, post turbo, air temp exiting intercooler, air temp exiting charge pipe, air temp in intake manifold plenum, etc).

If the sensor body temperature skews the air temp sensor's reading, then you need a better sensor since it's not doing its job (measuring the air temp it's designed to measure).

Test sensor, if heat soaking the body does not change its reading at the element, the sensor is good. Place it wherever you want to measure air temperature.
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