KOYORAD radiator VS. Spoon VS. Full Race

bcrichster

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Just a follow up this car still over heated.
Good info.. that means a $150 all aluminum radiator from China would work better / equivalent for much cheaper..??





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LURK-R

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A lot more money and work for it to still overheat. C&R rad is a bargain in comparison :)
I saved thousands by just doing cool down laps in between flyers. Albeit, not the best for establishing rhythm, still a bargain. Luckily the cool weather is here! 🤣

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Snmtazz70

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Seems like they all are having same issues. On other threads also.
 

turbociv910

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so what is the concensus after 6 pages- racing in desert 100 deg ambient heat, cr rad. Tracking in normal ~75f, temps temps any OTS rad is fine?
 

Dave B

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I get it that in very high temps for track use the C&R track rad is likely the best. I also understand it needs higher water pump pressure due to the tube design and some other factors. It also likely needs a well vented hood to be most effective.

I also understand that the 2020 rad may be an improvement but not spectacular. It may even be the larger grill opening that is making the most of the small improvement, not the rad.

For me, I will not be tracking in 100F temps and the most important issue is making sure the engine doesn't start pulling power during a 3-5 lap time-attack type competition. My car is still street driven and will see some very cold temps.

For lapping, I am ok with backing off every few laps but not keen on the computer pulling power due to higher coolant temps.

Bottom line, is the C&R street rad enough better than the OEM2020 rad to make it worthwhile on an unmodified engine?
 

alejandroads123

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I get it that in very high temps for track use the C&R track rad is likely the best. I also understand it needs higher water pump pressure due to the tube design and some other factors. It also likely needs a well vented hood to be most effective.

I also understand that the 2020 rad may be an improvement but not spectacular. It may even be the larger grill opening that is making the most of the small improvement, not the rad.

For me, I will not be tracking in 100F temps and the most important issue is making sure the engine doesn't start pulling power during a 3-5 lap time-attack type competition. My car is still street driven and will see some very cold temps.

For lapping, I am ok with backing off every few laps but not keen on the computer pulling power due to higher coolant temps.

Bottom line, is the C&R street rad enough better than the OEM2020 rad to make it worthwhile on an unmodified engine?
I track my car I my temps never went over 220f with 95 f degrees ambient temp no vented hood , I have koyorad and other driver has similar setup with koyorad any of us has overheating issues both car tuned over 380whp , no issues . The overheating issues is for many factors , could be tuning etc , in my opinion spend $1000 in a radiator is waste of money . Also both cars with Mishimoto intercooler . Both cars could make all the 3 session of 25 to 30 minutes non stop .
 
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Dave B

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I track my car I my temps never went over 220f with 95 f degrees ambient temp no vented hood , I have koyorad and other driver has similar setup with koyorad any of us has overheating issues both car tuned over 380whp , no issues . The overheating issues is for many factors , could be tuning etc , in my opinion spend $1000 in a radiator is waste of money . Also both cars with Mishimoto intercooler . Both cars could make all the 3 session of 25 to 30 minutes non stop .
Did you notice any drop in power during the 20-30 minute sessions?
 

alejandroads123

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Did you notice any drop in power during the 20-30 minute sessions?
Not at all, i was amazed how the car performed, intake temps around 105f, after intercooler around 97f , I need to go back to the track, now I have more power .
 

Myx

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I track my car I my temps never went over 220f with 95 f degrees ambient temp no vented hood , I have koyorad and other driver has similar setup with koyorad any of us has overheating issues both car tuned over 380whp , no issues . The overheating issues is for many factors , could be tuning etc , in my opinion spend $1000 in a radiator is waste of money . Also both cars with Mishimoto intercooler . Both cars could make all the 3 session of 25 to 30 minutes non stop .

This is good to know. Just read through all the pages and will do so again. I had no intentions of getting a radiator but when my engine blew (It was my fault.....), the piston/connecting rod that came out damaged my stock radiator. My mechanic replaced my stock radiator with a Koyo - VH083283.

The Koyo site says it's only for a manual but I have a CVT. Looking at my receipt and seeing Koyo led me to this discussion. This is good to know that it is an effective radiator. I don't track this car. Only occasional drag strip runs, with normal grandpa type driving 95% of the time. :D
 

Lust

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Did you notice any drop in power during the 20-30 minute sessions?
There’s definitely a drop in power when ECT rises above 200f and IAT above 100F
 

alejandroads123

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There’s definitely a drop in power when ECT rises above 200f and IAT above 100F
The power you might loose is around 10 to 18 whp, is no way you can notice that difference, now if you wanted to argue ''yes there is loose of power '' in that case you right.
 

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