Ls6, L76, or 105#

**gtmk7** · 03-23-2011

Hi, new to the site. I've searched for hours with no definitive answer. I plan on putting 1.9 Yella Terra rockers from Intense. They recommend using the Ls6 90# springs, but I've seen many people using the L76 springs or the Crow Cam 105# springs. What springs would be best for my car? What are the differences? Also, do I get the retainers and locks from Intense, ZZP, or GM? I have a 2004 gtp comp g with cai so far. I plan on doing headers, 3.6 mps, colder plugs, and an Overkill tune. Thanks for the help.

**Fivefingerdeathpunch** · 03-23-2011

i think some info might be in here.
http://www.grandprixforums.net/safel...car-17482.html

**gtmk7** · 03-23-2011

I have read that before but it still says Ls6 or L76. I was looking for more info, or personal experience.

**Explicit_Spade** · 03-23-2011

You can get locks and retainers from anywhere, they're all about the same. Don't forget new valve seals as well.

Any of those springs will work, its a matter of personal preference. Intense recommends a 90# spring, so anything over that will be fine. If you are planning on intercooling, I would go for the 105# springs.

**gtmk7** · 03-23-2011

Thanks. I don't plan on Intercooling. Are the higher springs more stressful on the valve train? What are the benifits?

**gtmk7** · 03-23-2011

I guess what i'm trying to say is what would be the least stressful on my engine? The Ls6 (90#) springs?

**99prixgt** · 03-23-2011

i ran L76 springs with 1.9' yella's. 18k later, still good as new. I prefer the L76 springs because they have a slightly better spring rate than Ls6's. With them, your 1.9's you can set your shift points from 6,000-6,100

if you really want to be easy on the valve train get crow 105's

**gtmk7** · 03-24-2011

Alright, I have a much better idea now. Thanks for the help everyone.

**SnowFlake** · 03-24-2011

How would the 105s be easiest on the valve train? Get L76's, they're a great match for 1.9 rockers. However you should do 105's and a cam...

**matt5112** · 03-24-2011

spring rate

**blueguy** · 03-24-2011

LS6 (90lb) Springs are actually the roughest on your valvetrain out of the 3...followed by I believe 105's, then L76's being the softest spring rate. On my XP motor 40k trashed a factory dampner.

**gtmk7** · 03-25-2011

Alright. So as long as I avoid the Ls6's my dampener should last longer? And L76's have the lowest spring rate making them less stressful? Or is it the 105#'s ? lol. Also, the manley retainers from Intense will work with all three springs, correct?

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