Koyo Review. Newer V-series vs older R-Series (racer/street input please)
So this Thread is for a review or info for those who would want to try out the newer Koyo Style. Trying to get some feed back on this. I sent an email to Koyo and this is the response I got in regards to the discontinue model older r1977 (52mm) VS the newer (36mm) V020311.
Hello Gino, thank you for contacting Koyorad. Yes R1977 has been replaced with V020311. The 53mm thick R1977 is actually one of our oldest models and was developed when Koyorad did not yet offer the 36mm cores for our performance radiators. As our core offerings have expanded and technology has improved, we can now get similar if not better results in smaller packages. Instead of prioritizing coolant volume as the industry once did, we now take fin/tube density and overall size into consideration. With much less volume than our old 53mm core, you have less chance of the cooling system heat soaking. A narrower radiator with similar tube and fin density has a number of benefits: improves overall air circulation through the radiator and entire engine bay, accounts for much less weight, easier to install, and allows more room for other performance components/coolers in the engine bay. For this application we took the OEM 16mm core density into account and determined that the V core was a better choice over the VH core. An engine that is over cooled or has difficulty reaching its proper operating temperature tends to run at a rich state and not within the vehicle manufacturer's recommended conditions.
Racing Department
KOYORAD Cooling Systems, Inc.
15 Doppler
Irvine, CA 92618
KOYORAD.COM - The Leader in Aftermarket OE Replacement Radiators
Aluminum Performance Racing Radiators by Koyorad (Koyo) Racing
SO.... With that been said... if it does the above new benefits, I'm guessing the new radiator (less velocity) with stock fans cfm VS older thicker core with weaker/low-profile fans cfm should cancel out to been even? I would like some race track car drivers reviews on this subject/point. And if that is in true.. going non-low-profile cfm fans and getting aftermarket with higher then cfm fans should be a correct theory?
Hello Gino, thank you for contacting Koyorad. Yes R1977 has been replaced with V020311. The 53mm thick R1977 is actually one of our oldest models and was developed when Koyorad did not yet offer the 36mm cores for our performance radiators. As our core offerings have expanded and technology has improved, we can now get similar if not better results in smaller packages. Instead of prioritizing coolant volume as the industry once did, we now take fin/tube density and overall size into consideration. With much less volume than our old 53mm core, you have less chance of the cooling system heat soaking. A narrower radiator with similar tube and fin density has a number of benefits: improves overall air circulation through the radiator and entire engine bay, accounts for much less weight, easier to install, and allows more room for other performance components/coolers in the engine bay. For this application we took the OEM 16mm core density into account and determined that the V core was a better choice over the VH core. An engine that is over cooled or has difficulty reaching its proper operating temperature tends to run at a rich state and not within the vehicle manufacturer's recommended conditions.
Racing Department
KOYORAD Cooling Systems, Inc.
15 Doppler
Irvine, CA 92618
KOYORAD.COM - The Leader in Aftermarket OE Replacement Radiators
Aluminum Performance Racing Radiators by Koyorad (Koyo) Racing
SO.... With that been said... if it does the above new benefits, I'm guessing the new radiator (less velocity) with stock fans cfm VS older thicker core with weaker/low-profile fans cfm should cancel out to been even? I would like some race track car drivers reviews on this subject/point. And if that is in true.. going non-low-profile cfm fans and getting aftermarket with higher then cfm fans should be a correct theory?
Be the first to like this post.
Back to top
