IHADAV8.com - Turbo Buick Tech, and Nonsense
Tech Area => General Buick Tech => Topic started by: Scoobum on December 01 2017, 06:16:05 AM
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Too much time on my hands...so I've been going over IC data.
Murph recorded an inlet temp of 70 degrees after the ALKY with a Cottons FM.
One of the locals...using RACE GAS recorded an air inlet temp of 180 degrees with a Precision FM. He swapped to an RJC 325 and his air inlet temp dropped to 123.
Discuss amongst yourselves.
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what does inlet mean in the above? 70 degs after alky? Does that mean going into the plenum?
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Both have the sensor in the plenum if I read the write-ups correctly.
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We kinda need know the ambient temp to make a good comparison also what boost each is running. The more you compress the higher the temp of the stuff you are compressing.
I've never been a front mount kinda guy. I understand getting the bigger cooler into the frontal area and why it works. Just seems to add to the complication of the system .
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Trying to compare intercoolers at the track and get accurate results is almost impossible. It's very hard to do in a controlled environment on a dyno too. The hour it took to swap allowed. air, water, oil temps and weather conditions to screw up the results. I would say on a 11 sec car with matching turbo most intercoolers would produce similar results. Once you start running big turbos and high boost (above 30lbs) intercooler specs come more into play
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Murph is also spraying his alky pre turbo.
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As Ed said, comparing IC numbers is very difficult. And, when you add chemical intercooling in the form of alky injection, you take a lot of the IC differences out of the equation.
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For what it is worth... when the TBSS ran its 11.9 @ 116mph it was on an 18*C day - the datalogs shows the IATs starting at 68-70*F and rising to 100*F by the end of the runs. These passes had the Procharger putting out 12psi the eBay special intercooler.
Honestly I think most of it has to do with air management across the core - how many guys actually seal their FMICs to the grille to avoid leakage and manage the high/low pressure areas on either side of the core? Very few in my experience.
The scoop we run on the TBSS is tightly sealed to the core, and it dumps into a low pressure area behind the bumper.
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Spraying alky on a hot summer day with my CAS4 I got down to 78'F at the end of the run at 117mph.
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apples and giraffes.
All that comparison proves is that alky cools the charge. ....and technically it doesn't prove that. (but we all know it's true).
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I've tested a total of 4 different IC's...and they're not created equal.
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apples and giraffes.
All that comparison proves is that alky cools the charge. ....and technically it doesn't prove that. (but we all know it's true).
Exactly! And giraffes? I thought more like Dragons!
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That would be if the test had a 2nd alky thrown in the mix.