Lunati .660 Springs Need some info
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Lunati .660 Springs Need some info
I ordered a set of Lunati .660 springs a few weeks ago and I recieved them shortly after. The problem is that there is no paperwork in the box. I bought them brand new from colorado speed so they were not used. I am looking for the coil bind height info and any other info about installing them. I know the install height is 1.800, but want to have all my bases covered when I go to install them next week. thanks
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I always measure coil bind height as well as seat LBS with a spring tester. take a spring to your local machine shop/engine builder and ask them to tell you the coil bind height and the seat LBS @1.800". also make sure you add a min of .050" to your coil bind height as a safety margin when doing your calculations
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I always measure coil bind height as well as seat LBS with a spring tester. take a spring to your local machine shop/engine builder and ask them to tell you the coil bind height and the seat LBS @1.800". also make sure you add a min of .050" to your coil bind height as a safety margin when doing your calculations
#5
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if coil bind is @ 1.100" (true coil bind) + .050" (mandatory min safety margin) = 1.150" coil bind height.
1.800" install height - 1.150" coil bind height = .650" max lift. You can run all the way up to that number, meaning if you follow the proper calculations and you get a max lift of .650" then you can safely run a .650" lift cam on that spring.
1.800" is the installed height on LS1/LS2 heads. you need to measure it though because most actually install slightly less than 1.800" usually 1.795" or so. also if the springs are used and you have very tight piston to valve clearances then you might want to use a safety margin of .060" when doing your math.
1.800" install height - 1.150" coil bind height = .650" max lift. You can run all the way up to that number, meaning if you follow the proper calculations and you get a max lift of .650" then you can safely run a .650" lift cam on that spring.
1.800" is the installed height on LS1/LS2 heads. you need to measure it though because most actually install slightly less than 1.800" usually 1.795" or so. also if the springs are used and you have very tight piston to valve clearances then you might want to use a safety margin of .060" when doing your math.
#6
There the same ones iv got, got them in a comp cam and lunati valvespring package through a company.
Mine was the same had no paper work in it, was a sealed box with, was a little unusual as other spring kits iv had have had all the details on a paper in the box.
Mine was the same had no paper work in it, was a sealed box with, was a little unusual as other spring kits iv had have had all the details on a paper in the box.
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They list .660 lift at an installed height of 1.81. Our heads usually setup at 1.80. So they are really a .650 lift spring on our heads. Clever marketing since there are lots of springs rated at .650 but not near as many with a higher rating. They are just trying to sell springs.
#10
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The LUN Kit with the Platuim springs, installed alot more then 1.800, on a stock gen3 head. The CB is alot less then 1.1 thats gona mess up alot of guys if you start working off that numbers. I bet they do it because the seat they use it to tall for you to start shimming that kit up, you run into problems.
#11
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Once again was showing him the formula not what his numbers were. Remove the numerical value and use xxx or yyy in their place. This of course is assuming the springs in question are made for your specific application
Last edited by 3rdCoastPowerSports; 04-08-2012 at 01:50 AM.