[ZR1] Radiator and cooling options
06-11-2011, 04:07 PM
#1
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Radiator and cooling options
Is there any interest in Upgraded radiators, and heat exchanger systems?
Lous car with 750 rwhp blistered the coolant temp at the Lonestar classic 3 weeks ago. We just finished a totally new radiator, heat exchanger, charge air cooler reservoir and front inlet.
Testing at Motorsports ranch yeilded nearly a 50* drop in coolant temps, however, we did remove the AC condenser for the upcoming hill climb. Having said that though, coolant temps on the first stint never reached over 195 in the texas heat ( 98* that day) second stint and third stint saw 200 and 202*. Oil temps were with in 20* of water temp at all time, and trans temp was significantly cooler, due to the drop in coolant temp. Previous coolant temps with in one lap, were 250+.
Were prepping the car for the hill climb next weekend, pics soon. Its pretty trick.
Louis
Lous car with 750 rwhp blistered the coolant temp at the Lonestar classic 3 weeks ago. We just finished a totally new radiator, heat exchanger, charge air cooler reservoir and front inlet.
Testing at Motorsports ranch yeilded nearly a 50* drop in coolant temps, however, we did remove the AC condenser for the upcoming hill climb. Having said that though, coolant temps on the first stint never reached over 195 in the texas heat ( 98* that day) second stint and third stint saw 200 and 202*. Oil temps were with in 20* of water temp at all time, and trans temp was significantly cooler, due to the drop in coolant temp. Previous coolant temps with in one lap, were 250+.
Were prepping the car for the hill climb next weekend, pics soon. Its pretty trick.
Louis
06-11-2011, 06:16 PM
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06-12-2011, 08:25 PM
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^^^^ I agree.
06-13-2011, 03:23 PM
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
I'm going to get with Louis and get some pictures once we are happy with them of the new setup.
Very excited after the first test that Lou and Louis did with the car last week, and the hill climb is going to give us even more data for it.
Very excited after the first test that Lou and Louis did with the car last week, and the hill climb is going to give us even more data for it.
06-13-2011, 07:04 PM
#9
Did you guys have the heat exchanger before changing the radiator. I'm just trying to figure out exactly which parts were responsible for the drop of 50 degrees. That's awesome though. This car runs seriously hot and gets heat soaked bad when drag racing. I'm sure road racing is better due to air flow.
06-13-2011, 07:13 PM
#10
Did you guys have the heat exchanger before changing the radiator. I'm just trying to figure out exactly which parts were responsible for the drop of 50 degrees. That's awesome though. This car runs seriously hot and gets heat soaked bad when drag racing. I'm sure road racing is better due to air flow.
06-13-2011, 07:22 PM
#11
Le Mans Master
Road racing does not have anywhere near the time periods of no air flow while still building heat that drag racing does.
It is the time of no airflow that causes heat soak....... not running all out
.
06-13-2011, 07:36 PM
#12
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Did you guys have the heat exchanger before changing the radiator. I'm just trying to figure out exactly which parts were responsible for the drop of 50 degrees. That's awesome though. This car runs seriously hot and gets heat soaked bad when drag racing. I'm sure road racing is better due to air flow.
The car gets very very hot under road racing conditions. Intake air increases, water temp goes up, tranny temps go up....it gets VERY hot during even a 5-8 minute session on track. JVP can tell you, even a stock car will run 250 water temps during a 20 minute session on track.
06-13-2011, 09:26 PM
#14
Not sure what you're talking about, as I've done both, and dr doesn't even hold a candle to rr.
06-13-2011, 09:35 PM
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Also, under full WOT, the compressor kicks off. I know this first hand because I used to run my A/C at the track. At WOT at speed, the air coming out of the vents was hotter than ambient. As soon as I let off WOT, the vent air was cooler again.
jas
06-14-2011, 04:43 AM
#17
Le Mans Master
06-14-2011, 04:55 AM
#18
Le Mans Master
Your suggestion would basically heat the engine up (A/C compressor load) to cool the engine down. There's no net gain there, and may even be a net loss overall.
Also, under full WOT, the compressor kicks off. I know this first hand because I used to run my A/C at the track. At WOT at speed, the air coming out of the vents was hotter than ambient. As soon as I let off WOT, the vent air was cooler again.
jas
Also, under full WOT, the compressor kicks off. I know this first hand because I used to run my A/C at the track. At WOT at speed, the air coming out of the vents was hotter than ambient. As soon as I let off WOT, the vent air was cooler again.
jas
When RR a pro-tour mexico style, I always turned the AC off because of the inherent power loss, but it seems the ZR1 must be already programmed this way for it to do what yours is doing.
What Lou and mthrmos are trying to do will be interesting to see...... especially considering their history with performance mods
06-15-2011, 05:50 PM
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St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
We are just getting the servers all up and going so I probably will not get pics up until we get back from the hill.
Wish us luck, we're going to make it two and a row for LG Motorsports and ZR1!!
Wish us luck, we're going to make it two and a row for LG Motorsports and ZR1!!
06-15-2011, 06:07 PM
#20
Le Mans Master
Yes, we had the larger heat exchanger in the car for over a year now as it was done before the Hill climb last year. That was helping the blower air, but nothing for engine coolant.
The car gets very very hot under road racing conditions. Intake air increases, water temp goes up, tranny temps go up....it gets VERY hot during even a 5-8 minute session on track. JVP can tell you, even a stock car will run 250 water temps during a 20 minute session on track.
The car gets very very hot under road racing conditions. Intake air increases, water temp goes up, tranny temps go up....it gets VERY hot during even a 5-8 minute session on track. JVP can tell you, even a stock car will run 250 water temps during a 20 minute session on track.