If I am right the 6.2 has 1.7 rockers. A set of 1.85s should be a worthwhile mod. Would the valve springs need to be upgraded?

 

I'm wondering if the LS7 rockers would work, they are 1.8 and have the offset intake like the L92s, they are about $15 each also.

 

Update, I found out that the reach from the fulcrum to the valve stem tip is further for the LS7 than the L92 so you cannot interchange the rockers. The LS7 rocker will overshoot the L92 valve stem and cause a serious damaging side load.

 

That's correct. It's because the LS7 has a different valve angle than the LS3/L92 head (12 degrees vs. 15), so the LS7 rocker has to have more reach to put the rocker tip on the valve stem.

 

so the L92 are 1.7???

 

If im not mistaken, all GM heads have 1.7 rockers

 

I checked the service manual and the 6.2L L92 has 1.7 rocker arms.

 

BuyAmericanIron, when you have a chance could you tell me what torque the manual says for the single bolt holding the sprocket on the cam? No hurry, cam swap with VVT limiter in the future. Thank you.

 

Just Enough, according to the GM High Tech article on the link below, it's 48 ft. lbs. and then 90 degrees. They say GM recommends that you should use a new bolt, since the phaser bolt is a torque to yield (like everything else on these motors):

http://www.gmhightechperformance.com...all/index.html

Let us know how the install goes. I'm gonna do the biggest Comp Cam in the near future too when I get a chance, and I'll do some photos and a write-up when I do.

 

Thanks CI Denali,
I'm going with the COMP 401 which is 214/228 on 114. I will be installing it within about 2 to 3 weeks. All parts are en route, I managed to snag one of the last couple of Crane L92 valve spring tools. Supposedly my 09 is an L94 not a L92 there are a few small differences, one is the throttle body which I posted a picture of, the VVT phaser has also been changed.