Author Topic: valves/valve springs kohler command single  (Read 3964 times)

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Offline gtpuller

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valves/valve springs kohler command single
« on: November 09, 2010, 10:40:00 PM »
tryin the easy way here anybody know where to buy titanium/ stainless steel valves and stiffer springs for the command single. part numbers?

if not what do you think would be a good installed/open pressure be for the springs. Not sure what cam lift i'm gonna have so can't really figure the open pressure yet. looked at manley valves and springs couldn't find the "stock" size, valve diameter could have missed


Tim Johnson


Offline Burwell555

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Re: valves/valve springs kohler command single
« Reply #1 on: November 09, 2010, 10:42:20 PM »
What kind of rpms are you planning on turning. Ti valves are NOT cheap. All of them for a big block chevy were like 1800 forthe good ones. Manley stainless valves were around 200 or so for the set. Food for thought
Zach Burwell
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Offline birdman_express

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Re: valves/valve springs kohler command single
« Reply #2 on: November 09, 2010, 10:44:35 PM »
what size stem, head, and length?
Marc Baker

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Offline gtpuller

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Re: valves/valve springs kohler command single
« Reply #3 on: November 09, 2010, 10:51:45 PM »
What kind of rpms are you planning on turning. Ti valves are NOT cheap. All of them for a big block chevy were like 1800 forthe good ones. Manley stainless valves were around 200 or so for the set. Food for thought

let me back track a minute then not gonna be runnin that high of RPM 4500 to 5000 maybe, will the stock valves and springs hold up then?

what size stem, head, and length?


have the valve head diameter and stem diameter haven't measured the valve stem length yet
Tim Johnson

Offline FlatheadPuller

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Re: valves/valve springs kohler command single
« Reply #4 on: November 10, 2010, 04:58:25 AM »
Stock valves will work fine. See if midwests HD springs for the command twin will work. They'll take .550 lift on a command twin head with no machine work
Dennis Bazzett
Grandville Michigan


Offline gtpuller

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Re: valves/valve springs kohler command single
« Reply #5 on: November 10, 2010, 07:39:54 AM »
I believe the CVS springs are too short 1.8" free length. The springs on the cv-14 are 48.69mm/1.917" intake and 55.8mm/2.197" free length. Don't know about the DVS double springs for .3" longer valves maybe. But if they would fit would they be potentially be too stiff?
Tim Johnson


Offline Burwell555

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Re: valves/valve springs kohler command single
« Reply #6 on: November 10, 2010, 07:48:08 AM »
Yes I would agree with dennis. A good set of stockers or stainless valves would be fine. Ti isn't usually used in automotive until your motor reguarly sees the 8000 and above range.
Zach Burwell
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Offline Caseracer

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Re: valves/valve springs kohler command single
« Reply #7 on: November 10, 2010, 08:01:03 AM »
The Briggs Double Springs that EC sells are very close too the same diameter and length as the stock Kohler springs.  If you're not looking for more than 5000 rpm's you could use the outer spring only and save some cam wear or rocker stud issues.

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Hard Case Racing
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Offline mow fast

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Re: valves/valve springs kohler command single
« Reply #8 on: November 10, 2010, 08:53:30 AM »
I can get valve springs for the cv motor ,double or single also rocker studs,pivots.lock nuts ,set screws ,solid lifters,cam grind that is a beast .Ive been running double springs on my motor for two years ,broke the engine down ,there was no cam wear.Never had a problem with the valve train.I turn my motor about 7200 rpms with a stock rod.Wont be long we will have a billit rod and piston for that motor.If interested pm.

Offline gtpuller

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Re: valves/valve springs kohler command single
« Reply #9 on: November 10, 2010, 08:30:50 PM »
In reference to the DVS springs from midwest super cub

In an e-mail that I received.

"I think they might work, you will have to figure out your installed spring height and then check the tension at that height.  You probably don't want anything over 125 seat pressure and 250 open for a cast iron flat tappet cam."

I'm gonna try to take the head to the local engine shop tomorrow and have them measure the valve seat pressure to see what the stock seat pressure is. Like I have stated before i'm just learnin this stuff. so I have to ask am I goin about this the hard way?

http://www.kennedysdynotune.com/Valve%20Spring%20Tech.htm


I found this article that seems to relate well to this.
 
Tim Johnson