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Title: Cam gears Post by: bugnut68 on March 07, 2012, 01:50:13 am Since I have the honor (;D) of putting my 2017cc mill together a second time, this time on a much more substantial foundation (std/std universal case), I'm going to revisit my initial decision to run helical cut cam gears. It's my understanding that straight cut cam gears aren't necessary until one starts running super high valve spring pressures. My combination has VW style dual springs, as equipped by Steve and Greg Tims (they're stage II heads with 42x37.5mm valves).
This is a limited use engine that I build for street and bracket racing use, so odds are it will come apart for upgrades versus necessity (one can only hope, lol)... so, before I go about this again, should I reconsider my initial choice of stock gears versus straight cuts? I know I certainly love the sound of straight cuts, but I'm just looking at pure necessity and what's needed versus what's necessarily pleasing to my ears. Title: Re: Cam gears Post by: Bruce on March 07, 2012, 05:02:40 am You don't need straight cut gears.
Spend your $ on something that will increase reliability, or make more hp. Title: Re: Cam gears Post by: neil68 on March 07, 2012, 07:41:08 am Are you using double-thrust cam bearings?
Title: Re: Cam gears Post by: Zach Gomulka on March 07, 2012, 14:25:03 pm I'm starting to appreciate engines without them. Makes the exhaust and carb noise stand out. :)
Title: Re: Cam gears Post by: bugnut68 on March 07, 2012, 17:36:41 pm Yup, running double-thrust cam bearings. I figured I really didn't need them, and as it sits this engine is going into a more or less seasonal car, with no heat, etc. Pretty much a spring and summer only type of car as it gets colder'n hell here in Lakeview, Oregon. Lol. It's going to take a long time to rack up any serious miles on this engine, even with the six-mile trip to the local 1/8 mile track.
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