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engine life with dual valve springs

LeonChuppLeonChupp
I'm looking for data on what to expect in the way of life expectancy in a 1915cc or 2165cc engine equiped with dual valve springs to allow a 7,500 rpm red line. I'm aware that straight cut gears are supposed to releive thrust on the cam bearings.

Currently my 1915cc runs single springs and floats the valves at about 6,500 rpm. Given it's current condition, I'd say it's probably good for 60,000+ mi. I don't flog it regularly, but do on occasion.
Engine is almost 5 yrs. old with 21,000mi on the clock.

Hoping someone has run an engine with dual springs on the street long enough to evaluate it's possible life span, given the normal oil changes, valve adjustments, etc.

Thanks to all....

Leon C.

Of all the things I've lost, I miss my mind the most.....  

 

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LeonChuppLeonChupp
I'm looking for data on what to expect in the way of life expectancy in a 1915cc or 2165cc engine equiped with dual valve springs to allow a 7,500 rpm red line. I'm aware that straight cut gears are supposed to releive thrust on the cam bearings.

Currently my 1915cc runs single springs and floats the valves at about 6,500 rpm. Given it's current condition, I'd say it's probably good for 60,000+ mi. I don't flog it regularly, but do on occasion.
Engine is almost 5 yrs. old with 21,000mi on the clock.

Hoping someone has run an engine with dual springs on the street long enough to evaluate it's possible life span, given the normal oil changes, valve adjustments, etc.

Thanks to all....

Leon C.
FM Former Member
Gene Berg did it all the time with his street engines and according to his literature high valve spring tension is better for high performance street engines. As you say, when your valves float you've got the recipe for big problems. Read all about it: http://www.geneberg.com/cat.php?cPath=6_150_2763
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