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SVT Shelby GT500
Dual pass he vs triple pass
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<blockquote data-quote="SCGallo2" data-source="post: 16501039" data-attributes="member: 160791"><p>I recently conducted a real-world test on my 2008 GT500, where I recorded downstream temps during normal driving with fans installed and fans removed from my original Shelby/C&R dual pass heat exchanger. The basis of my heat exchanger test and threshold was to see if I had full programmed timing advance at the hit or was my car already heat soaked at the hit and pulling timing due to high IAT2 temps. The outside air temp during back-to-back testing was right at 80*F, and my radiator cooling fan was commanded ON during both tests by running the air conditioner. <span style="color: #00ff00">I saw a 5-10*F decrease in IAT2s while cruising at highway speed with fans installed and running (full timing at the hit), with the ability to recover after a WOT run.</span> <span style="color: #ff0000">With the fans removed, once the intercooler fluid heat soaked, there was no cooling down IAT2s below 130*F (timing being pulled at the hit), even on the highway at 70mph.</span> In earlier GT500s, the lower grill opening for the heat exchanger is only 23” long x 5” tall, and there is simply not enough airflow through that opening on a hot day to cool the IC fluid without assistance from fans.</p><p></p><p>My conclusions with a Shelby/C&R heat exchanger:</p><p>1. Heat exchanger fans do work in conditions other than just in stop and go traffic and in the staging lanes by pulling air through the heat exchanger.</p><p>2. Fans do not impede airflow through the heat exchanger (at least up to 70mph) as some would have you believe.</p><p>3. The radiator cooling fan is not adequate to also draw enough air through the heat exchanger to cool downstream temps.</p><p>4. My heat exchanger fans are currently installed and will remain installed because they benefit my application.</p><p></p><p>[ATTACH=full]1665687[/ATTACH]</p></blockquote><p></p>
[QUOTE="SCGallo2, post: 16501039, member: 160791"] I recently conducted a real-world test on my 2008 GT500, where I recorded downstream temps during normal driving with fans installed and fans removed from my original Shelby/C&R dual pass heat exchanger. The basis of my heat exchanger test and threshold was to see if I had full programmed timing advance at the hit or was my car already heat soaked at the hit and pulling timing due to high IAT2 temps. The outside air temp during back-to-back testing was right at 80*F, and my radiator cooling fan was commanded ON during both tests by running the air conditioner. [color=#00ff00]I saw a 5-10*F decrease in IAT2s while cruising at highway speed with fans installed and running (full timing at the hit), with the ability to recover after a WOT run.[/color] [color=#ff0000]With the fans removed, once the intercooler fluid heat soaked, there was no cooling down IAT2s below 130*F (timing being pulled at the hit), even on the highway at 70mph.[/color] In earlier GT500s, the lower grill opening for the heat exchanger is only 23” long x 5” tall, and there is simply not enough airflow through that opening on a hot day to cool the IC fluid without assistance from fans. My conclusions with a Shelby/C&R heat exchanger: 1. Heat exchanger fans do work in conditions other than just in stop and go traffic and in the staging lanes by pulling air through the heat exchanger. 2. Fans do not impede airflow through the heat exchanger (at least up to 70mph) as some would have you believe. 3. The radiator cooling fan is not adequate to also draw enough air through the heat exchanger to cool downstream temps. 4. My heat exchanger fans are currently installed and will remain installed because they benefit my application. [ATTACH=full]1665687[/ATTACH] [/QUOTE]
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Dual pass he vs triple pass
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