LS4 Cam specs?
Thread Starter
Joined: Jul 2005
Posts: 531
Likes: 1
From: Texas, Europe, Iraq & Afghanistan
LS4 Cam specs? Anyone know the specs. on the LS4 car/truck engine?
I'm about to get a 2007 Avalanche with the 5.3 LS4 DoD engine.
I will put in a little bigger cam and a set of Patriot Performance Stage II heads I have. My goal is to make another 50 rwhp. But, I want to know what the factory cam is before shop for a new one.
In 2WD models it generates 320 horsepower and 340 lb.-ft. of torque.
In 4x4 models it generates 310 horsepower and 335 lb.-ft. of torque.
Thanks!
I'm about to get a 2007 Avalanche with the 5.3 LS4 DoD engine.
I will put in a little bigger cam and a set of Patriot Performance Stage II heads I have. My goal is to make another 50 rwhp. But, I want to know what the factory cam is before shop for a new one.
In 2WD models it generates 320 horsepower and 340 lb.-ft. of torque.
In 4x4 models it generates 310 horsepower and 335 lb.-ft. of torque.
Thanks!
Are you planning on keeping the DoD intact?
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Originally Posted by Gregory
Yes, I will maintain the displacement on demand.
Why do you ask?
Why do you ask?
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
LS1Tech Sponsor
Joined: Feb 2006
Posts: 1,170
Likes: 1
From: Rockfield Kentucky
I was told that the DOD engines use different lobes and lifters on the DOD cylinders. So if you intall an aftermarket cam you will lose the DOD.
I have an L92 engine with DOD and I plan to change the cam and lifters. I will post more as I figure it out.
There may be people here that have done this swap already.
Robin
I have an L92 engine with DOD and I plan to change the cam and lifters. I will post more as I figure it out.
There may be people here that have done this swap already.
Robin
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Teching In
Joined: Jan 2007
Posts: 42
Likes: 0
From: Southeast OH
I have wondered this myself as well. Could you swap in the L92 or L76 camshaft into the DOD 5.3? I know this is oversimplifying things, but in old muscle cars a decent big engine cam turns pretty radical in a smaller engine.
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TECH Regular
Joined: Nov 2005
Posts: 459
Likes: 0
From: Arlington, TN
I have not seen any company come up with a performance cam for the AFM/DOD engines.
Considering more v-8's are coming from GM with AFM/DOD -vs- without I can't figure out why the aftermarket hasn't started designing cam's for them yet.
An idea to help you reach your goals of 50hp increase right now would be a set of longer rocker arms, the patriot heads you already have and maybe a set of shorty or LT headers for your vehicle. Along with a Filter upgrade (possibly filter box upgrade).
Just an fyi on the lift increase with the different rocker arms.
1.70" rockers are the stock size for LS1/LS2/LS4/LS6/L76/L92 motors
1.75" rockers increase the max lift by 2.94%
1.8" rockers increase the max lift by 5.88%
1.85" rockers increase the max lift by 8.82%
Respectively if the stock cam has a max lift of .525 then a 1.75" rockers would up it to .540", 1.8's would put the lift to .555", and 1.85's would push it up to .571" for max lift.
Now one thing I'm wondering is if the Patriot Gold .650" capable dual springs would be to much for the stock cam or the DOD lifters (possibly to much back pressure)???
You might give Comp a call and see if they can cut a dual pattern cam that will stay under the AFM/DOD lifters max lift spec's. Say something in the 22x/22x range with a 4 to 6 split (ie exhaust lobe larger then intake lobe).
Considering more v-8's are coming from GM with AFM/DOD -vs- without I can't figure out why the aftermarket hasn't started designing cam's for them yet.
An idea to help you reach your goals of 50hp increase right now would be a set of longer rocker arms, the patriot heads you already have and maybe a set of shorty or LT headers for your vehicle. Along with a Filter upgrade (possibly filter box upgrade).
Just an fyi on the lift increase with the different rocker arms.
1.70" rockers are the stock size for LS1/LS2/LS4/LS6/L76/L92 motors
1.75" rockers increase the max lift by 2.94%
1.8" rockers increase the max lift by 5.88%
1.85" rockers increase the max lift by 8.82%
Respectively if the stock cam has a max lift of .525 then a 1.75" rockers would up it to .540", 1.8's would put the lift to .555", and 1.85's would push it up to .571" for max lift.
Now one thing I'm wondering is if the Patriot Gold .650" capable dual springs would be to much for the stock cam or the DOD lifters (possibly to much back pressure)???
You might give Comp a call and see if they can cut a dual pattern cam that will stay under the AFM/DOD lifters max lift spec's. Say something in the 22x/22x range with a 4 to 6 split (ie exhaust lobe larger then intake lobe).
Thread Starter
Joined: Jul 2005
Posts: 531
Likes: 1
From: Texas, Europe, Iraq & Afghanistan
I had hoped my journey wouldn't get too involved, but I may go for a custom grind camshaft. I thought about the SLP rocker arms to, and figured that might be an alternative route. The thinking about the Patriot springs being to stiff to work with the special lifters is something deeper to ponder.
I've searched truck sites, engine sites and even the general internet. Maybe something will pop up. I would think the market will open up when the DoD Camaro engine hits the streets. In the mean time I will call CompCams.
I've searched truck sites, engine sites and even the general internet. Maybe something will pop up. I would think the market will open up when the DoD Camaro engine hits the streets. In the mean time I will call CompCams.
Last edited by Gregory; Jan 28, 2007 at 05:52 AM. Reason: Added sentence.
