Should I advance my cam timing?
06-02-2009, 08:18 AM
#1
Staging Lane
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Should I advance my cam timing? I just picked up a comp cams grind # XER273HR. The cam is a 224/230 .581/.588 114LSA 112ICL. (here is their online cam card for more detail http://www.compcams.com/Cam_Specs/Ca...csid=1092&sb=2)
This is going in a 2006 AWD Trailblazer SS, its got FULL bolt ons, and a completely stock longblock (until the cam goes in). The truck weighs in at 4500lbs with me in it, also has a Vig. 3600 stall, and I run on (4) 275/40/17 DRs at the track, effectively making the gear ratio a 4.80.
I was planning on installing the cam straight up, without degreeing, dot to dot. Ive also got an adjustable timing set that I really dont want to put on because the oil pump is going to be a pain in my ***.
There are a few people who suggested advancing the cam timing 4* to pick up some more power down low. Id hate to install this straight up and be wondering if I left some power on the table.
My two concerns are that I am already running a 3600 stall, which stalls closer to 3800 now, and the cam will likely make it stall even higher. Do I even need the bottom end at that point? The second part, is that Im not degreeing the cam. It doesnt bother me when installing it straight up, but messing with the cam timing and not degreeing it has me worried a bit.
This is going in a 2006 AWD Trailblazer SS, its got FULL bolt ons, and a completely stock longblock (until the cam goes in). The truck weighs in at 4500lbs with me in it, also has a Vig. 3600 stall, and I run on (4) 275/40/17 DRs at the track, effectively making the gear ratio a 4.80.
I was planning on installing the cam straight up, without degreeing, dot to dot. Ive also got an adjustable timing set that I really dont want to put on because the oil pump is going to be a pain in my ***.
There are a few people who suggested advancing the cam timing 4* to pick up some more power down low. Id hate to install this straight up and be wondering if I left some power on the table.
My two concerns are that I am already running a 3600 stall, which stalls closer to 3800 now, and the cam will likely make it stall even higher. Do I even need the bottom end at that point? The second part, is that Im not degreeing the cam. It doesnt bother me when installing it straight up, but messing with the cam timing and not degreeing it has me worried a bit.
06-02-2009, 09:15 AM
#2
I'd say that unless you've got the degree wheel kit, it's a waste of time to mess with your cam timing. It could be advanced more than what the cam was designed for already due to machining variance in the timing set and camshaft. It could actually need to be retarded a few degrees (get your giggles out kiddos!).
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
06-09-2009, 09:08 AM
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That's like just throwing in a random length push rod without measuring to determine what you really need.
