NEEDforSPEED

i plan on useing a
CC 305 cam 220/230, .510/.510 114, RPM 1500/5500
with a 1.6 rocker ratio witch will end up being .544/.544 lift
i have lt1 heads fitted with .550" max lift springs
will i be safe?

NEEDforSPEED

anyone

SLEEPER 86

be sure to check for coil bind and retainer to guide clearance!
at least .060 for both,but better off with .100"
Eric B

RB83L69

What springs are they, in reality? Part numbers only please.

What installed height are they set to? Measurements only please; unless of course your machinist gave you that info, such that you don't have to measure it yourself.

Without those pieces of information, nobody can tell you whether it will work or not.

One thing I definitely CAN tell you though: if you plan on running valve lift with .006" of the springs' absolute max rating, you DAMN SURE better have them set up perfect. Considering that the thinnest shims you can get are .015" (2½ times the tolerance you have to work within), you don't have alot of room for error.

Sounds to me like not a very wise idea.

You also need to check the heads for the retainers smacking into the guides.

NEEDforSPEED

I did some checking and the closest I've come up with from measuring the spring od 1.458 and the install hight aprox. 1.835 is that they could be a k-motion spring p#K-800 od 1.460 install 1.850 lift .600 Thats about as close as I can come up with

ede

since you don't know whjat you have and that they may be k motion springs i'd trash them and get a set to match your cam. look at comp, lunati, or crane for springs

NEEDforSPEED

why the hell would i do that? they'v just been installed

RB83L69

You don't have a clue what springs they are. So how do you know that "they're good to .550" lift"?

Do you have a valve spring micrometer? Then how do you know that they're set up at 1.835"?

Do you honestly believe that even if you did have a valve spring mic and you measured the installed height that they happen to be stuck onto your heads at, that just because whoever installed your springs set them at some particular height, that whatever height that is, is the actual "spec" height for whatever springs you have, such that you can identify the spring by comparing how they're installed to some "specs" you found for some springs somewhere?

If the answers to those questions are what I think they are, you would be wise to buy what the cam mfr says is the right springs, and take them to somebody that knows what they're doing and has the right tools (i.e. don't try to do it yourself) to be installed according to the cam mfr's instructions.

The reason why you should do that has nothing to do with how recently these mystery springs were installed; rather, it is so that we don't have to read yet another "why did my cam wipe lobes" or "my studs pulled out" post.

NEEDforSPEED

You don't have a clue what springs they are. So how do you know that "they're good to .550" lift"?

becuz one of are loco f-body guys sold them to me and he was runing a cc306 cam .510"/.540" i can ask more about them

RB83L69

It doesn't really work that way; he might have just got lucky. Or he might have had them set with too much installed height, such that the seat pressure was too low (easy to bounce the valves off the seat at high RPMs) but at least if he didn't buzz it on up there too bad, everthing might have survived. Or, for all you know, they're completely used up; and the very next time they open, one might break.

The rule governing the situation is really quite simple. And that is, if you don't have a part #, then you have no way of knowing what you have. There's absolutely no way to guarantee that you're in safe territory, or that you're not for that matter. You simply have no idea of knowing where you are. Unidentifiable used springs is just a long way of saying "garbage". I think you'd be taking a BIG risk by using them, and just inviting trouble. If I was in your shoes I'd be ordering some springs right about now.