what is the different purposes for inner and outer valve springs?
which one does what?

so when replacing both cams....you need 16 new springs, or 32?
if you have an itr engine you keep what springs?

thanks
did a huge search btw

 

cmon
maybe the tech guys aren't on now

 

im oretty sure they do the same thing, just that it's firmer. correct me if i am wrong though

 

i left my manual in my car.....too cold......ill get it tomorrow


[Modified by cancan, 10:47 PM 2/17/2003]

 

they are different YES..stiffer etc..

they allow the valve to move

and how many valves is your motor...16..then u need 32 new ones total ., if u have ITR motor depending on what kinda cam profiling you get youll have to change accordingly


[Modified by hybridvteceg, 1:39 PM 2/18/2003]

 

ok bud
my question is why are there 2 springs PER valve

 

there are two so you have a progressive spring rate. When the outer ring coils are binded you still have the spring pressure of the inner spring during high lift. This prevents valve float during high rpm.

 

oh so its like you never have a maxed out spring?
thanks btw


[Modified by cancan, 12:13 PM 2/18/2003]

 

NO

You NEVER want either spring to bind.
The reason for 2 springs is you can get more pressure out of two springs than you can with one.

 

sgt, you rock

 

Yes Sgt is right. Valvesprings inner/outer both serve the same purpose- To shut the valve. The inner spring is actually used as a dampner. At high RPM's and with high lift cams- this will reduce the chances of floating your valves.

 

Also, with inner and outter springs, it spreads out the pressure of the spring on the retainer, creating a less-likely chance that the retainer will break from too much pressure on the outside ring.