Originally Posted by slmhofy
(Post 1316011)
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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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. |
Originally Posted by nitrodann
(Post 1316023)
It was 95f, 22psi.
I can't answer any of your questions but id like to. 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. |
Originally Posted by slmhofy
(Post 1316135)
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. But I'm no trackday bro so I'm not 100% sure what is normal on track. Just sharing data |
We need @Savington in here with Theseus logs.
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he had a precision core with decent ducting so yeah
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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. |
:dealwithit: |
Originally Posted by Savington
(Post 1316169)
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. |
Originally Posted by Savington
(Post 1316169)
Theseus ran max IATs of maybe 30*F over ambient doing 20 minutes of 4-5-6 pulls in 100*F weather.
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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. |
Originally Posted by Braineack
(Post 1316181)
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. 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. :idea: Sticking it in the intercooler exit tells you the air temp exiting the intercooler, sure. |
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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: |
Originally Posted by patsmx5
(Post 1316180)
I've asked before, but will you post a datalog showing this?
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:laugh: well played
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Originally Posted by Savington
(Post 1316201)
Sure, just as soon as you dyno your car.
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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? |
end tank is best for everything
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Originally Posted by nitrodann
(Post 1316293)
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? 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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