LQ4 Cam Swap Valvetrain Questions?
Jul 7, 2013 | 09:28 PM
#1
LQ4 Cam Swap Valvetrain Questions?
Ive been in the LT1 world a little while and finally made the move to LS engines so kinda new
I have an 04 Silverado with an 08 LQ4 w/317heads swap. Headers/Intake/Tune aleady.
Truck came with a new in box TSP 228R112 cam and Yank Racing ST3000 stall.
Looking to finish gathering everything else to finish up my cam swap.
I know I need the typical stuff like Valve Springs, Ret, Locks, pushrods. Any advice is on brand ideas are greatly appreciated.
In LT1 world everyone was swapping to LS7 lifters and that they are the current number replacement part number for all lifters. Does the LQ4 already have the LS7 lifters or should I swap mine out anyways?
I doubt but are the rocker arms roller rockers? What kind of ratio or ditch them for aftermarket
LT1 rocker arm studs were small. Is Rocker stud upgrade neccessary?
LS2 timing chain work with factory LQ4 timing sprockets?
And what I dont know a whole lot about is when it comes to degreeing in the cam. The cam card shows a 110 ICL and with a 112LSA its ground with 2 degrees advancement. Is it fine to install with factory marks and no degree wheel?
I have an 04 Silverado with an 08 LQ4 w/317heads swap. Headers/Intake/Tune aleady.
Truck came with a new in box TSP 228R112 cam and Yank Racing ST3000 stall.
Looking to finish gathering everything else to finish up my cam swap.
I know I need the typical stuff like Valve Springs, Ret, Locks, pushrods. Any advice is on brand ideas are greatly appreciated.
In LT1 world everyone was swapping to LS7 lifters and that they are the current number replacement part number for all lifters. Does the LQ4 already have the LS7 lifters or should I swap mine out anyways?
I doubt but are the rocker arms roller rockers? What kind of ratio or ditch them for aftermarket
LT1 rocker arm studs were small. Is Rocker stud upgrade neccessary?
LS2 timing chain work with factory LQ4 timing sprockets?
And what I dont know a whole lot about is when it comes to degreeing in the cam. The cam card shows a 110 ICL and with a 112LSA its ground with 2 degrees advancement. Is it fine to install with factory marks and no degree wheel?
Jul 9, 2013 | 07:52 AM
#3
TECH Resident
Joined: Aug 2005
Posts: 779
Likes: 5
From: warwick,ny
Rocker arms aren't roller but they work great stick with them no reason to upgrade. If you do a lot of high rpms then most upgrade their stock rockers with the comp trunion upgrade. I doubt you will be doing that in a truck. How many miles on your truck? Stock lifters which are roller lifters will be fine. To replace the lifters on a ls you will need to remove the heads.
Jul 9, 2013 | 08:03 PM
#4
Was told the motor had less than 50k miles. It has great pressure in normal driving and jump up around 80psi at wot pulls.
Really have to pull the heads for an ls? I worked at the chevy dealer working on hybrids and they had recall for bad lifters and flattening the cam lobes on the newer trucks. I dont remember anyone pulling heads to change the lifters.
What about needing a degree wheel or just throw it in with normal timing marks?
Really have to pull the heads for an ls? I worked at the chevy dealer working on hybrids and they had recall for bad lifters and flattening the cam lobes on the newer trucks. I dont remember anyone pulling heads to change the lifters.
What about needing a degree wheel or just throw it in with normal timing marks?
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