converting from old style to bee hive springs

[brad hibbard]

I am a little surprised that there are still quite a few engines out there with the old style valve spring on the 604
all sanctions (that I know of) permit the updated bee-hive valve springs on the 604 no matter the year of the engine

here is a link from our website with things you should know when doing the conversion

the last few sentences are very important --pertaining to the removal of keeper land burrs
feel free to call me to discuss this procedure

http://race-1.com/p-26187-what-should-i-know-about-604-beehive-springs.html

Brad

https://www.race-1.com

[PushinTheLimit]

Brad, what is your recommended number of laps on a set of bee-hives before you change them out?

[brad hibbard]

there are a few "IF's" here
IF you started with hand picked springs that are at the high side of spec
IF your installed heights are properly set
IF you run a respectable RPM (below 6800)
IF your temperatures are in line (oil below 260) (water below 210)

IF all of the above are followed we have seen them last in excess of 40 racing nights

variations to the above shorten the life

Brad

https://www.race-1.com