MoTox8410 Posted March 17, 2005 Report Share Posted March 17, 2005 if i were to put stiffer springs in my 93 Z34 with 144XXX miles on it do you think i would see an improvement at all??? where can i get stiffer springs?? what all do i have to do to replace the springs on the LQ1??? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted March 17, 2005 Report Share Posted March 17, 2005 why in the world would you need stiffer springs? Your springs are as such that the open and closed pressure match your cams and heads. Having only stiffer valve springs will wear on the valves and their seats. You only need different springs when you have cam(s) that are not to stock specs. EDIT: Plus, thats a lot of work, just to do valve springs. Quote Link to comment Share on other sites More sharing options...
MoTox8410 Posted March 17, 2005 Author Report Share Posted March 17, 2005 well even stock springs maybe...i thought that overtime (144XXX) miles the springs become weak and they "float" a lot easier --seems like i rember an easy way to replace the springs without any major work??? Quote Link to comment Share on other sites More sharing options...
Bossman429 Posted March 17, 2005 Report Share Posted March 17, 2005 --seems like i rember an easy way to replace the springs without any major work??? You can make an adapter to do this. what you do is take the threaded end of a spark plug, gut the spark plug. Thread a connector to the spark plug threads so you can plug the adapter into shop or compressed air and thread it into the spark plug hole. The compressed air will have enough pressure to hold the valve in the seated position while you remove the spring retainer clips. Without making this adapter the valve will drop into the motor when you remove the retainer clips. Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted March 17, 2005 Report Share Posted March 17, 2005 If you dont want to adapt a spark plug, just turn the crank over by hand so the piston of the particular cylinder you are working on is at TDC. Well, steel had a high fatigue limit, and since you arent pushing the maximum lift of the stock springs, the fatigue limit will be even higher. Plus, if you want to replace something b/c its simply old, go for something like piston rings or cams or something. Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 17, 2005 Report Share Posted March 17, 2005 I put stiffer valve springs when I switched the heads, intake manifolds, etc. The valvetrain got quieter (typical 3x00 lifter BS) and the engine makes more vacuum across the board, and it runs smoother. As for a performance gain, I couldn't tell you. Quote Link to comment Share on other sites More sharing options...
dbtk2 Posted March 17, 2005 Report Share Posted March 17, 2005 Stiffer springs wouldn't provide a performance gain unless your valves are so weak that they are floating at high rpms. Your valves will actually have more wear on them with stiffere springs and will open slower and close faster. So unless you are raising the lift it is kinda stupid to go with stiffer springs IMO unless you are having a problem with yours being too weak. Quote Link to comment Share on other sites More sharing options...
Brian P Posted March 17, 2005 Report Share Posted March 17, 2005 Food for thought- the LS1 guys put LS6 springs in their otherwise stock engines, and get an actual proven gain from it. Not to say this is true for any of our applications though, but it's not always a bad thing, especially considering the weak springs GM put in the 3x00 and '96-97 DOHC Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.