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#4844 - 08/31/20 05:18 PM Thermal Reduction Tests  
Joined: Dec 2000
Posts: 4,785
teamzr1 Offline
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teamzr1  Offline
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Lives in Engine Bay

Joined: Dec 2000
Posts: 4,785
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Can Thermal reflection productions help reduce the temperatures within engine bay to help performance ?

So we are doing some testing using our C5 Corvette

Questions added to this which does a better job of preventing the engine, exhaust and engine bay temps in increasing temps that then effect how well or poor the engine functions.

In these testcases the C5 is highly modified,

It has a well vented hood as shown below that forces colder outside air in, flows in engine bay and then exit scoops that the air flowing above hood extracts the hotter bay temps put

Cooling Tstat opens sooner at 185 F degrees

PCM tuned and in part command the 2 coolant fans on sooner then what GM stock calibration is

Because of that these test temps will be much lower then if the C5 was stock, exp when the car is in motion and at that time the engine bay temps will be much cooler then stock the bay temps would be closer to about 200 plus degrees

But tests results are showing when the C5 is parked and at idle where no reactions of vented hood is in effect.

Testing

1. With no thermal reflection product is used
2. Reflection reduction using a silver based product
3. Instead using a gold based product

At this time results are showing no thermal and using silver product

J-Probe locations

1. Fuel Pressure sender off fuel rail
2. Air bridge from aircleaner
3. Center of intake manifold
4. Right fuel rail


Weather was 76 deg and coolant temps stayed around 188 deg

1. After C5 was driven in 76 deg weather and coolant temps around 186 F degrees
2. Then let idle for 6 minutes and then recording temps via the four J-Probes concurrently at the points shown below
3. Then after engine is turned OFF and letting heat soak for 6 minutes with hood shut and then recording the probes temp readings

Will be installing a gold based reflection reduction product and repeating the tests


Attached Files thermalhood.jpgthermaltests.jpgRebelThermal.jpg

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#4850 - 09/03/20 06:27 PM Re: Thermal Reduction Tests [Re: teamzr1]  
Joined: Dec 2000
Posts: 4,785
teamzr1 Offline
Owner - Pays the bills
teamzr1  Offline
Owner - Pays the bills
Lives in Engine Bay

Joined: Dec 2000
Posts: 4,785
America
Due to how much hotter the weather was today in testing the Gold thermal product installed at 90 degrees
could not do a fair compare with results above

So instead taking that the weather being 90 degrees, coolant temp 190 deg and engine oil temp 200 degrees

Here is a percentage of how much lower the 4 J-probe (same location as test above) temps were to the 190 deg coolant temp

Assume then if coolant 190 deg, plus oil temp, intake air temp (monitored with OBD-II scanner) equaled weather temp of 90 deg
that the J probe points would be higher without the gold thermal

Results are after engine warmed up and then driving 20 miles and reading taken while driving

Results shown below as probes at

J-Probe locations

1. Fuel Pressure sender off fuel rail
2. Air bridge from aircleaner
3. Center of intake manifold
4. Right fuel rail

See the percentage values lower then coolant temp



Attached Files GoldT.jpgGoldthermal.jpg

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