stock springs 
stock springs
Launching!
Joined: Sep 2008
Posts: 234
Likes: 0
From: Ashland,VA
i wouldnt base your cam change on keeping stock springs. If thats the case its not even worth the work of replacing the cam....... If your changing the cam to something bigger the springs need to change as well
To add to that, the stock springs have been known to cause/contribute to valvetrain instability and valve float even with stock camshaft combos....I would not use them on an aftermarket cam setup that has more aggressive profiles than stock!
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Thread Starter
Teching In
Joined: Jul 2009
Posts: 20
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From: Clarksville Indiana
This is for a friend. He want to keep the rpm around 6400 max. He doesnt want to have to take it to a shop and spend a ton in labor i have been told tha springs is kinda hard for a not so seasoned mechanic. he doesnt wanna have to take the heads out.
No need to take the heads off to change the springs....but I cannot overstate how important sufficient spring pressure is for valvetrain control!
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Verdad Gallardo Launching!
Joined: Sep 2008
Posts: 234
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From: Ashland,VA
remove rockers, put compressed air to the cylinders, get a screw type valve spring tool, install comp 918 springs (they fit on stock seats just as stock springs do and have good pressure to .600 lift) , reinstall all previously removed parts , and have a nice day not worrying if your springs will break....
TECH Apprentice
Joined: Oct 2008
Posts: 330
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From: Wheaton, Illinois
Get something that will screw into where your spark plugs go. I think they even make something for that, that you could prolly buy on summit or jegs. And yes to put compressed air in the cylinder you have to take the spark plugs out bc thats where the fitting goes.
Using the screw type valve spring tool that uses two hooks to grab the spring with a performance aftermarket spring is asking for problems down the road. You should use only the type of compressor that presses on the valve spring retainer.
Launching!
Joined: Sep 2008
Posts: 234
Likes: 0
From: Ashland,VA
^ good to know.....thanks for the info............I guess the bottom line here is dont short yourself alittle extra work to do things right because it will more than likely bite you in the *** later.
^This can be done, but I actually just used the TDC method when it was time to swap valvesprings. Just make sure you don't swap on the wrong cylinder or you'll drop a valve...
At the bare minimum, get LS6 springs. Even though this will still limit the lift/lobe type you should run, it makes waaay more sense than running on stock springs. Plus, the yellow ones can be found for 40ish bucks in the classified section.
