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C6 Corvette ZR1 & Z06General info about GM’s Corvette Supercar, LS9 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track
For whatever reason I have not really done much work on my Z, but I really need to start rather than paying someone else. As a little background, I do all of the work on the BMW's that I own, full suspension, turbos, r&r lsd, etc. ,so I am fairly confident in my wrenching ability. However, I have never messed around with these motors, but rockers seem like a fairly easy start. I have these comp shaft rockers being delivered this week and I would like to just install them myself. Any pointers?
Of course, these are going on OEM LS7 heads and I am running Johnson 2110 lifters.
Spring pressure should be OK the shaft rockers use OEM rockers or something like OEM I don't think k they are heavier/thicker. Check with comp I think they should be OK. Now if you are going with ones that are adjustable or gave a wheel on the tip spring pressure might be needed depending on what you have. You need a pushrod length checker as I think some people have needed different length pushrods with the shaft rockers kit.
i posted about this earlier, i had them installed on my car, its a straight forward operation, just drove to the Amelia Island Concours and back, about 3-4 hour round trip, im happy with them
You will have to check pushrod length for sure with these. Make sure to do intake and exhaust. The LS7's we have done using them so far are taking a slightly longer pushrod than the OE rocker FYI. Most seem to be right at or just under 7.900" in length.
They do a good job of explaining everything in the instructions as far as bolting them down since you are going to have some opening and some closing and with it on a common rail you could tweak it a bit if you just bolted it it down tight from one end to the other. I do like to pre-oil and lube all of the rockers and move them prior to bolting them down. Lube the valve tip and pushrod tips as well so it doesn't start dry.
When you go to pull the old rockers off, try and make sure the cam is on the base circle when doing so, so the threads are not loaded when removing them since it is a small bolt and you can easily damage the threads in the heads.
I don't see any reason to change your valve spring pressures based off these rockers....that would be a valve weight / cam lobe selection more than this. If it was a heavier rocker or roller tip...possibly.
Last edited by HP RESEARCH; 03-11-2019 at 04:34 PM.
I don't see any reason to change your valve spring pressures based off these rockers....that would be a valve weight / cam lobe selection more than this. If it was a heavier rocker or roller tip...possibly.
I assumed it was a roller tip rocker. That's my fault. What are the benefits of this over stock?
I assumed it was a roller tip rocker. That's my fault. What are the benefits of this over stock?
By tying all eight rocker arms together on a single shaft that fits in the stock rocker stand, COMP Cams has found a way to improve valve train dynamics, increase valve train stiffness and reduce deflection. The use of a tri-layer bushing instead of needle bearings also reduces deflection and eliminates the high Hertz loading that is present in needle bearing trunnions, for more rigidity and durability. In a first for the LS market, provisions are included for optional pressurized oiling to further improve rocker arm durability and performance.
The increased valve train stiffness provided by the COMP Cams Max-Lift BSR Shaft Rocker Systems makes the same camshaft perform like a slightly larger camshaft as more of the lobe lift is transferred directly to the valve, instead of being absorbed by deflection in the cylinder head and single-bolt rocker mounting design. The system will also allow the use of higher lift, more aggressive camshafts before the valve train goes out of control.
Add stability, more lift on high end from the stability, more RPM limit. Comps spin testing showed great gains in stability, and lift/control over the nonlinked rockers.
What do you feel max lift would be with these rockers?
Everything stated, and everyone we have talked to at Comp has stated 0.700 is about all you want to go with them or you start getting some bad things going on with the tip of the rocker and valve tip wear.
Everything stated, and everyone we have talked to at Comp has stated 0.700 is about all you want to go with them or you start getting some bad things going on with the tip of the rocker and valve tip wear.
My current cam has an Intake lift of .661" and I felt that is a tad high for the stock rockers. This setup should give me more stability and allow me to run my current cam safely.
03-10-2019, 10:55 AM
Comp BSR shaft rockers install
