caleb90 Posted February 4, 2021 Report Share Posted February 4, 2021 doing a 4mil stock cylinder build. should be 65-70hp when done, are capable are the oem radiators keeping up with cooling at higher hp levels? want to see if i need a larger one for this build or not Quote Link to comment Share on other sites More sharing options...
gusto Posted February 4, 2021 Report Share Posted February 4, 2021 yes Quote Link to comment Share on other sites More sharing options...
caleb90 Posted February 4, 2021 Author Report Share Posted February 4, 2021 32 minutes ago, gusto said: yes yes the oem is good enough for my build? or yes i need to upgrade Quote Link to comment Share on other sites More sharing options...
gusto Posted February 4, 2021 Report Share Posted February 4, 2021 Stock is good enough with your high flow impeller Quote Link to comment Share on other sites More sharing options...
hoppedupandcutdown Posted February 5, 2021 Report Share Posted February 5, 2021 I use a stock radiator in my 421 Serval, never had a problem. Quote Link to comment Share on other sites More sharing options...
caleb90 Posted February 5, 2021 Author Report Share Posted February 5, 2021 ok thanks guys Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted February 6, 2021 Report Share Posted February 6, 2021 OEM is fine. Always run them in our dune bikes. Quote Link to comment Share on other sites More sharing options...
sycoticbanshee00 Posted March 4, 2021 Report Share Posted March 4, 2021 Stock radiator on my 421 cub, +7 timing, high compression build, no issues with cooling at dumont dunes. Quote Link to comment Share on other sites More sharing options...
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