Original valve springs or competion cam 979 or 980 #89

[evil666]

I want to change the valve springs in my car , and I was going to replace the springs with the same ones I have, which are the originals. I was just wondering if I am better off replacing them with the 979 or 980 #89 comp cam valve springs . What is the advantage with these springs compared to the stock ones. Will I see a performance gain even since my car doesn't have that much milage. I love the stock springs because they don't make any noise (no clacking), will the 979 or 980 #89 comp cam valve springs be as quiet. If I should go with the comp cam springs , which ones 979 or 980?

Thanks for any help I can get.
Marco

86 Grand National t-top (59900km)
stock long block,stock suspension, red stripe convertor, te44, smc alk injection, 24lbs boost, 94 octane, hooker cat back with dyno max ultra flow muffers, tomco 30lbs injectors, dynotech stage 4 street chip, thdp, mease 24 row IC, Ron Custom max boost brake module, MT drag radials (275/50/15) 3800lbs race weight with driver.
BEST E/T
60FT=1.52
1/8= 7.38
I/4= 11.74
MPH=113
BESTmph=114

 

[Ormand]

Valve springs don't affect the noise that the engine makes. The stock springs get weak over time, and after a number of years, and a lot of miles, they will be too "soft" the control the valve action, and the engine will start to miss badly at higher rpm, gradually losing rpm. Since the springs are constantly under compression, even when the motor is not running, they can gradually take a "set", and lose some preload. Stock, new springs would take the engine past 5,500 rpm. Stock,worn out springs may give up at 4,500 rpm, or less. The "out of control" valve train can damage things, too, so running at max rpm with weak springs is risky.
Aftermarket springs of about the same rating as the stock springs will bring back the "lost" rpm, and may last longer than stock springs.

 

[87GN_70GS]

If you have a stock cam, stock-type springs (Fed-Mog VS-677, Melling VS-380, Pioneer RV-880, Comp 979, etc.) will be fine.

 

[scottyb]

I used 979's with the cups. Mild upgrade from stock, and not pressure that puts the cam at risk. I did it at 175k miles and it made a butt dyno difference. Very noticable.