LQ9 Mild Cam Advice?
10-21-2007, 06:13 PM
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LQ9 Mild Cam Advice? Looking for some advice for cam selection:
Cam is going into:
Otherwise stock LQ4/LQ9 w ECM Reprogram
Stock Truck 4L60E & converter
Stock truck intake/Throttle Body
Stock truck exhaust manifolds (no cats with a good 2.5" exhaust)
3.42:1 Rear Gears
Chevelle Convertible will probably weigh 3800 lbs with me in it
When it comes to cams (for street cars) I am one of these guys who tends to believe less is more. I want something that sounds a little more aggressive than stock, has a big fat torque curve, and makes the most out of the rest of the combination.
It seems the truck intake shines the most under 5000 RPM, so something with peak hp no higher than 5500-6000 RPM range makes sense to me.
I havent seen flow numbers for the LQ9s 317 heads so I dont really know how much a cam would need to favor the exhaust side (especially given that I am planning to run truck manifolds). I know there are lots of guys who do custom cams, but most of those seem to work in racing a lot more than street cars.
Options that look interesting:
Lunati VooDoo 60510
Duration @ .050 IN/EX: 212/218;Lift IN/EX: .531"/.531";LSA / ICL: 113/109
Comp Cams XR265HR
Duration @ .050 IN/EX: 212/218;Lift IN/EX: .515"/.522";LSA: 114
Crane Cams?? Maybe call them and get something custom made?
What do you guys think?
Thanks in advance for your insight!
Cam is going into:
Otherwise stock LQ4/LQ9 w ECM Reprogram
Stock Truck 4L60E & converter
Stock truck intake/Throttle Body
Stock truck exhaust manifolds (no cats with a good 2.5" exhaust)
3.42:1 Rear Gears
Chevelle Convertible will probably weigh 3800 lbs with me in it
When it comes to cams (for street cars) I am one of these guys who tends to believe less is more. I want something that sounds a little more aggressive than stock, has a big fat torque curve, and makes the most out of the rest of the combination.
It seems the truck intake shines the most under 5000 RPM, so something with peak hp no higher than 5500-6000 RPM range makes sense to me.
I havent seen flow numbers for the LQ9s 317 heads so I dont really know how much a cam would need to favor the exhaust side (especially given that I am planning to run truck manifolds). I know there are lots of guys who do custom cams, but most of those seem to work in racing a lot more than street cars.
Options that look interesting:
Lunati VooDoo 60510
Duration @ .050 IN/EX: 212/218;Lift IN/EX: .531"/.531";LSA / ICL: 113/109
Comp Cams XR265HR
Duration @ .050 IN/EX: 212/218;Lift IN/EX: .515"/.522";LSA: 114
Crane Cams?? Maybe call them and get something custom made?
What do you guys think?
Thanks in advance for your insight!
10-21-2007, 08:16 PM
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I just heard back from John at Speartech.com
GT2
Duration @ .050 IN/EX: 207/220;Lift IN/EX: .573"/.580";CL: 117.5
GT2-3
Duration @ .050 IN/EX: 207/220;Lift IN/EX: .571"/.578";CL: 118.5
Speartech seems to have a great rep here on the site. Right now I certainly am leaning towards the GT2-2 with a Speartech-prepped harness and ECM.
"We have had real good performance out of several of the cams from Lingenfelter. The GT-2 or the GT 2-3 are both good cams for a mild setup with a stock converter. Your exhaust system should work well with those cams. I've had real good luck with the stock exhaust manifolds, no cats, and a well built, high flow system"
I looked up those cams. They are mild, spec'd a lot like the LS6 cam but bigger (which makes sense to me given my goals). The GT2-3 seems to be aimed at guys thinking of power adders, where the recommended GT2 or GT2-2 looks lilke a better choice for me maybe.GT2
Duration @ .050 IN/EX: 207/220;Lift IN/EX: .573"/.580";CL: 117.5
GT2-3
Duration @ .050 IN/EX: 207/220;Lift IN/EX: .571"/.578";CL: 118.5
Speartech seems to have a great rep here on the site. Right now I certainly am leaning towards the GT2-2 with a Speartech-prepped harness and ECM.
Last edited by Malibu71; 10-21-2007 at 08:38 PM. Reason: correcting links to quoted cams
10-26-2007, 11:33 PM
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pcm I have a silverado I swap the 4.8 for a LQ9 6.0L. Are the PCM's (power train control module)the same. I used the 4.8 pcm and it seem like there no more power than the 4.8L engine.
What kind of cam can I used to get power and other stuff?
What kind of cam can I used to get power and other stuff?
