my406cid

Good afternoon. By know. Im sure that everyone has read the gm high preformance ls3 camshaft test with the 10 diffrent cams. I was going back over this article and noticed that for all the cams they used the comps cams 918 behive springs. If these springs are only good for .600, howdid the. Use in that test? The lingenfelter cam was .629 intake and .644 exhaust. How does that work? The newest of the comps cams 918 springs can take only. 625. Am I missing something here?

wildcamaro

iTrader: (15)

Sometimes advertised lift varies from what the actual lift is and a lot of other factors are gloved such as installed height and coil bind to name a few, more than meets the eye lol

2000PewterT/A

Many of the ratings spring manufacturers give are less than what the spring can truly handle. That doesn't mean its a good idea to but a monster cam on a spring that won't handle it.

wildcamaro

iTrader: (15)

Yea the only true way to know what any spring is capable of is to measure them on a spring checking tool...it's good to check even with brand new springs, I don't trust anybody!

my406cid

So is te safe to say a comp 918 can handle .650 in a ls3 headg per this article? They didnt break 1 Spring.

JakeFusion

iTrader: (7)

Hell no.

wildcamaro

iTrader: (15)

Gotta take those articles with a grain of salt...

JakeFusion

iTrader: (7)

I wouldn't run a super aggressive lobe with a beehive.

However, if you went with a milder or endurance lobe, there are a couple of beehives I'd run and would recommend them:

PSI 1511 for lightweight LS3 valves and stock rockers + endurance profiles.
or
PAC 1519 if you need a little more spring pressure due to higher RPMs or more aggressive profiles.

Jimbo1367

Remember that lobe design has a lot to do with it too.

wildcamaro

iTrader: (15)

I'm running XER lobes with comp 918s no problem...I don't have any fear because the cam and springs were developed together...