Stock Valve Springs
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,757
Likes: 2
From: Middletown DE
Stock Valve Springs
What lift are they good too???? I'm putting on a set of Harland Sharp 1.8 Rockers and was considering upgrading the springs if they can't handle the .554 lift that I will be getting. I've been told that the stock springs can handle up to .580 Is that true????
Burning Brakes
Joined: Nov 2007
Posts: 1,083
Likes: 3
From: Buena Park CA
I've heard that, too. I have the Comp Cams 1.85 roller rockers that I have not installed just yet and was told they would be no problem. However, if you change the cam later on, then I think they will be a problem.
Instructor
Joined: Nov 2006
Posts: 207
Likes: 0
From: Hesperia Ca.
St. Jude Donor '07-'08-'09-'10-'11-'12-'13
I just helped my buddy put them on his LS2 GTO. We took it to the tuner after we were done, and could not get engine passed 6350 RPM, due to valve float. I think the springs he ordered were from Comp Cams, but they were changing the design of the spring. He just got them a few days ago, after a 7 week wait. He has a stock cam.
Thread Starter
Drifting
Joined: Jun 2007
Posts: 1,757
Likes: 2
From: Middletown DE
I just helped my buddy put them on his LS2 GTO. We took it to the tuner after we were done, and could not get engine passed 6350 RPM, due to valve float. I think the springs he ordered were from Comp Cams, but they were changing the design of the spring. He just got them a few days ago, after a 7 week wait. He has a stock cam.
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
I've been running 1.85 SLP rockers in my 05 with the stock LS2 springs and cam for a few years now. No issues at all, and no float on the dyno. That said, I don't know anything about the Harland rockers, but I do know that weight is everything when it comes to valvetrains. The SLP design is very light at the stem since there's no heavy steel roller hanging there, and that works well with a beehive spring.
Lots on this forum will disagree, but I prefer the lightest valvetrain components and beehive springs much more than heavy parts and heavy double springs with heavy pressure to compensate. To each his own.
Lots on this forum will disagree, but I prefer the lightest valvetrain components and beehive springs much more than heavy parts and heavy double springs with heavy pressure to compensate. To each his own.
Burning Brakes
Joined: May 2007
Posts: 829
Likes: 0
From: San Francisco CA
The Harland Sharps are just to heavy at the tip (46grams if I remember right)for the stock valvesprings.I got float at exactly 6000rpm on my LS2. They felt great up until then though,very noticable difference. I took them off and immediately felt the loss. Then I put on the LS7 1.8 rockers (4.5 grams at the tip) and got all the power back and no float. SLP 1.85(the stock looking ones,not the roller tip)might be at the edge of what the stock springs can handle lift wise but the weight would be fine plus you can't tell the difference between them and stock.
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Racer
Joined: Nov 2007
Posts: 496
Likes: 0
From: Pittsburgh Pa
St. Jude Donor '12, '15
I've been running 1.85 SLP rockers in my 05 with the stock LS2 springs and cam for a few years now. No issues at all, and no float on the dyno. That said, I don't know anything about the Harland rockers, but I do know that weight is everything when it comes to valvetrains. The SLP design is very light at the stem since there's no heavy steel roller hanging there, and that works well with a beehive spring.
Lots on this forum will disagree, but I prefer the lightest valvetrain components and beehive springs much more than heavy parts and heavy double springs with heavy pressure to compensate. To each his own.
Lots on this forum will disagree, but I prefer the lightest valvetrain components and beehive springs much more than heavy parts and heavy double springs with heavy pressure to compensate. To each his own.
Safety Car
Joined: Dec 1999
Posts: 4,148
Likes: 5
From: Roxbury NJ
