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Cam install with High miles?
Well my G8 gxp now has 113,000 miles on it now and I have itch for more power. I'm the original owner and has been well maintained. Would it be wise of me to leave it alone or cam it and worry about my motor going soon? I'm looking to make at least 460rwhp to 480rwhp. My car already has supporting mods clutch,headers,exhaust, cold air intake..
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VIP Member
113k miles isn't sh!t on an LS series engine - or nearly any quality engine at this point.
Cam away.
2009 PBM G8 GT
Pat G 218/226 & TSP Dual 660s, ARP Bits, DSteck Tuned, Magnacharger Chrome 2300 1:1, RCR Ported/Polished TB, Blower, & L92 Heads w/ LS3 intake valves, Smith Brothers Trunion Bushing Kit, ARH 1 7/8 Magnaflow MidMuff/Solo Axlebacks, RotoFab, VaporWorx PWM 1:1 fuel system, ID1050x injectors
Mike Norris Motorsports Catchcan, AEM 30-4100, JHP Boost/Fuel Gauge Pod
TSW Nurburgring Matte Gray 18" w/Nitto 555 & 555R, Satin Black SS Brembo Fronts, BMR Trailing Arms, Pedders Sway Bars, Whiteline Bushings
Gloss Black Valve Covers, 6k HID, V6 Handles, Interior/License Plate LEDs, Debadged, Holden Black Trim, Polk Dxi, GXP diffusor, a few bits from Crazy Paul
Originally Posted by TonyKarter
Anyone who has ever worked on a car has been in your position, and sitting cross-legged on a concrete floor with a dim shop light is its own kind of hell... Chalk it up as one of the rites of passage.
RIP Charlie - GRRRR8
RIP Chris Wells - Panzer Leader
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Senior Member
I did @100,000
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+1 on the cam, my g has 130k on it now, around 20k on a healthy cam from pat g
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Thanks for the input I feel much safer about camming my gxp now
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Yeah, just replace the timing assembly and you'll have to put in new springs and stuff so I don't see an issue with it. If you pull the trans for a stall, replace the rear main seal. May not hurt to replace the oil pump, but it's by NO means necessary.
2009.5 MSM GXP 500ish N/A RWHP. Mods include but aren't limited to: Texas Speed 418 (6.8L) fully forged held together with ARP from top to bottom, PRC 255cc heads, Rick Crawford intake plenum, TB port, polish and tune, Roto-Fab 102mm CAI w/LS7 MAF, Kooks 1-7/8" headers wrapped with DEI, Corsa catless system, Circle D 3200 Stall, 3.45 final drive, BMR's complete street bushing kit and sway bars, Eibach Pro Kit, G-Force Axles, running on staggered VMR 710's with Bridgestone RE11 rubber. HSV triple gauge pack with Calais smokers kit mod, V6 tails, debadge/rebadge, V6 door handles, AU black door trim, Maverick Man under hood strut covers, & washer and bolt kit, fully corrected paint thanks to Adams Polishes and my hard work. Built with reliability in mind with some power for those times when you need to pass or go over a big hill. Just a poser, not a racer!
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VIP Member
Lifters and springs should be replaced while your in there.
Trays, push rods, timing set and rocker upgrade is a good idea as well.
I would inspect the oil pump and seals and make my judgment then.
And its always good to clean the pan and pickup tube as well as the heads when you have it apart.
I made 445whp through a manual transmission with just a mild cam on the 6.0. 480whp is a tall order with just a cam. But you can get close with a manual. Probably best to have it spec'd to your goals.
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My car is a m6 so no need for a stall. I did plan on doing springs push rods and timing chain,lifters. Is there any benefit to replacing the roller rockers or a need to change them?
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Rocker trunnion upgrade would be a good idea.
Rotohack 102 intake - 102 MAF - TPIS 102 TB - TVS1900 ported & plated w 8 rib 2.5" front + OD rear
PnP Interchiller - RCR ported heads - RCR Lunati 219/231 113+1 - Forged Bottom End
ARH 2" LT headers - Solo 3" CB - MT DRs + M&H FRs on Weld RT-S
CTS-V fuel w Vaporworx - FAST 85s - Alkycontrol meth M15 + M10 - RCR tune
9.75@139.2 ? rwhp ? rwtq
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Be sure to inspect the cam bearings also. Not sure how well they hold up on the ls3, but 3 of the ls2's ive done all had chunks missing from the cam bearings.
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