97 Z Me Go

iTrader: (11)

i have a 2010 denali. I have a set of prc l92 ported heads and they are just sitting around. They are milled .30. Could i put these on or will is mess with the pushrod/dod/valve clearance?

Anyone know?
Kyle

ND400

Anytime you change the height of the valve train to the cam shaft you will mess with the geometry.

I believe a new set of pushrods you'll be fine.

Sales2@Texas-speed

iTrader: (5)

I would agree, milled .030" will likely warrant a pushrod length change but other than that you should be good to go

97 Z Me Go

iTrader: (11)

Do you think a 7.3 pushrod instead of the 7.4 would be what I need?

Sales2@Texas-speed

iTrader: (5)

No, that'll likely be way too short. We recommend customer ALWAYS measure to attain accurate and correct preload. The tool is only $20 and will save you alot of headaches!

1slow01Z71

iTrader: (36)

If you keep VVT youll probably have PTV clearance problems depending on what size cam you decide to go with or you could ditch VVT all together and not worry about it.

Sales2@Texas-speed

iTrader: (5)

VVT in and of itself is not the problem on piston to valve clearance...rather, it's people throwing random lobes onto VVT cores, not installing the cam properly, and not tuning the advance correctly that causes it to interfere. Milling a head .030" is not a major concern for PtoV clearance on VVT if the installer/builder/tuner know what they are doing

97 Z Me Go

iTrader: (11)

so the ptvc is not going to be an issue. I do not plan on a cam. I just have these heads and they are sitting around i figured i might as well put them to use rather then let them rott. My only issue is going to be the pushrods. So get the tool and call it a day and I should be good to go?

Kyle

Sales2@Texas-speed

iTrader: (5)

Should be perfect! Again, same as any other install...measuring PtoV clearance, pushrod length, etc is important and should not be neglected!

cam

iTrader: (9)

Are you talking of using a VVT cam without a phase limiter and then tuning in the retard/advance limits? If not how does tuning affect ptv clearance when using a mechanical limiter?

Sales2@Texas-speed

iTrader: (5)

I was actually talking about the VVT phaser tables in the PCM being adjusted properly. The limiter on the front of the engine limits the retard that can be run. But you can still play within that range by tweaking the tables in the PCM.