valve spring help

[94magh]

i just bought a cc306 and k-motion 800 springs from a buddy of mine...im doing a cam swap in my 94z but i want to know if these springs will work on my stock heads or do i need to get 918s? i have read that they will but have read too that u need to cut down the valve seat...im kinda new to the lt1 motors and will appreciate any help with this

[Viper]

http://www.kmotion.biz/springpress.htm

http://www.summitracing.com/parts/kmo-k-800

At 1.75 inches seat pressure is 212lbs solid roller cams seat pressure 190lbs up the CC306 is cast cam non billet these will wipe the lobes on the cam also the open pressure at 1.250 which is only .500 lift is 448lbs these are too strong for this cam. Another issue to run them they are 1.460" diameter spring pockets would need to be enlarged and then the right spring cups to use them. Even running without the inner spring these are too stout for a cast hydraulic roller cam.



I say try these would cost less than the head machining and spring cups

http://www.alexsparts.com/lt1-valve-spring-kit-includes-springs-retainers-locks-cups/


or Run LS6 beehive springs

http://www.jegs.com/i/Chevrolet+Performance/809/12499224/10002/-1


With these retainers/cups

http://www.alexsparts.com/products/BEEHIVE-VALVE-SPRING-RETAINERS-FOR-7-DEGREE-11{47}32"-APPLICATIONS-.html (http://www.alexsparts.com/products/BEEHIVE-VALVE-SPRING-RETAINERS-FOR-7-DEGREE-11{47}32"-APPLICATIONS-.html)



Lunati Voodoo LS / SBC Chevy .600" Lift Pacaloy Beehive Valve Springs 74818-16
http://www.ebay.com/itm/Lunati-Voodoo-LS-SBC-Chevy-600-Lift-Pacaloy-Beehive-Valve-Springs-74818-16-/380681184447

[94magh]

thanks for explaining that...i will be selling these and prolly go wit alexs springs

[Bersaglieri]

Just set the K-800's at a higher installed height. People have been using them on builds for 10 years. They were popular on GM847 cams for a long time and although those are billet grinds, at 1.900" or so I don't think it'd be a problem on a cast cam. My old cast cam is handling 165lbs or so on the seat.

I don't like beehives, just too many failures for my taste. Get a nice dual spring if you absolutely want to swap, Comp 977, Lunati duals [similar to Patriot Golds], etc.

As always with used springs, check the pressures on all of them to make sure they aren't smoked.

[Viper]

GM 847 Cams are billet cams not cast like the cc306. Would need longer stem valves and or retainers to set up taller height. at 1.80" they are still over 190lb seat presssure. Simpler and more cost effective to run a spring with about 110-130 seat pressure 330-350 open pressure outer diameter maximum 1.32".

Beehive springs

http://ls1tech.com/forums/lt1-lt4-modifications/1600944-beehive-springs-strikes-again-edit-now-called-engine-rebuilt-2013-a.html

http://ls1tech.com/forums/generation-iii-internal-engine/728254-comp-cams-918-spring-broke.html

[englundjd]

i'd stay away from alex springs on a decent sized cam, ive had two sets now. the first set had dampners in them and when we pulled the springs out to replace most of the dampners were broke and the springs were shot in less then 20k miles on my little cc304 .... second set has only been going for a few thousand miles now so im just crossing my fingers and wondering why i bought them twice.

[Viper]

Lloyd Elliot states to remove all damper springs for use on the LT1

http://ls1tech.com/forums/lt1-lt4-modifications/1273889-bullet-vs2700-spring-install-not-working.html (http://ls1tech.com/forums/lt1-lt4-modifications/1273889-bullet-vs2700-spring-install-not-working.html)


Post #5

http://www.camaroz28.com/forums/lt1-based-engine-tech-9/lloyd-elliot-emission-cam-725187/ (http://www.camaroz28.com/forums/lt1-based-engine-tech-9/lloyd-elliot-emission-cam-725187/)


Here is Lloyds recommendations if you don't agree with mine

http://www.ls1lt1.com/forum/lt1-|-lt4-|-l99-engine-tech/31236-valve-spring-guide.html (http://www.ls1lt1.com/forum/lt1-|-lt4-|-l99-engine-tech/31236-valve-spring-guide.html)


Howards 98215 springs
http://www.ls1lt1.com/forum/lt1-|-lt4-|-l99-engine-tech/57280-removal-flat-wire-damper-center-98215-howard-valve-spring.html (http://www.ls1lt1.com/forum/lt1-|-lt4-|-l99-engine-tech/57280-removal-flat-wire-damper-center-98215-howard-valve-spring.html)


http://ls1tech.com/forums/lt1-lt4-modifications/1578705-broke-valve-spring-last-night.html (http://ls1tech.com/forums/lt1-lt4-modifications/1578705-broke-valve-spring-last-night.html)


Alex's Parts are mfg by Elgin or Pioneer


Alex's parts seemed to work great with the CC503 I've provided information in these links to failures with most all springs the problem I think is failure to set valvetrain geometry then again could also be poor quality control in all cases everything about$ todayl

http://ls1tech.com/forums/lt1-lt4-modifications/1636086-best-mild-cam-2.html (http://ls1tech.com/forums/lt1-lt4-modifications/1636086-best-mild-cam-2.html)


Good link on valvetrain geometry get adjustable length pushrod and see what length needed if changing to other than stock head gaskets and or milling the cylinder heads for more compression.

http://forum.grumpysperformance.com/viewtopic.php?f=52&t=181&p=347#p347 (http://forum.grumpysperformance.com/viewtopic.php?f=52&t=181&p=347#p347)

[94magh]

thanks for all the info