GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Ls9 Cam results, dang.

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Old Oct 16, 2011 | 04:06 PM
  #61  
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Originally Posted by TIM Z
I guess you guys dont buy exhaust just for sound then either?
i bought my exhaust to shave some weight
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Old Oct 16, 2011 | 06:40 PM
  #62  
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whats odd is, mine has run it's best times hot. right off the street to tech, to the staging lanes. or nascar style. back to back to back runs.

i like the power band from the dyno sheet. over coming the soggy low end is a quick fix. just more tuning fun


the more i think about it. the more i want to get away from the vvt crap. hence why i am very intrigued about this cam set up. loppy cam noise is something i don't need. being sneaky is so much more fun.
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Old Oct 16, 2011 | 06:49 PM
  #63  
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Mufflers only exist to alter or quiet the tone of a vehicle. The only reason to change a muffler on a factory truck is to change the sound. That's why I swapped out my enormous factory muff for a short 3.5" glasspack and never looked back. The most you'll gain or lose by swapping mufflers is negligible anyways. Now as far as camshafts go, they determine how tour vehicle makes its power. If you're going to pull your camshafts and upgrade your valvesprings, generally your ultimate goal is to get more usable power out of your setup. Why give up usable power for a distinct sound in an N/A application? To each his own; as much as I like to hear a lumpy muscle car idling at a traffic light, my first priority with internal engine mods is usable power.
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Old Oct 16, 2011 | 08:00 PM
  #64  
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Originally Posted by rjwz28
Mufflers only exist to alter or quiet the tone of a vehicle. The only reason to change a muffler on a factory truck is to change the sound. That's why I swapped out my enormous factory muff for a short 3.5" glasspack and never looked back. The most you'll gain or lose by swapping mufflers is negligible anyways. Now as far as camshafts go, they determine how tour vehicle makes its power. If you're going to pull your camshafts and upgrade your valvesprings, generally your ultimate goal is to get more usable power out of your setup. Why give up usable power for a distinct sound in an N/A application? To each his own; as much as I like to hear a lumpy muscle car idling at a traffic light, my first priority with internal engine mods is usable power.
the wider lsa of the stock ls7/9 cams lead to a wider usable torque band.

im a sneaky son of a bitch when it comes to drag racing. the closer it sounds to stock, the more fun i can have with it.
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Old Oct 17, 2011 | 12:10 AM
  #65  
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you all forget that a cam with a lower LSA will have a tighter powerband. if your racing and have a converter there is no need for a wide powerband, your truck is only going to be sitting in the top 2000 rpms while racing. Now if its a street driven DD with no converter, then yes wide powerbands are nice.
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Old Oct 17, 2011 | 12:48 AM
  #66  
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Originally Posted by OrangeChevyII
Lol, ive never had to be so specific about anything in my life.
LOL was thinking the same thing as you responded to each question

Very nice results.
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Old Oct 17, 2011 | 01:10 PM
  #67  
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To use a new cam in a gen 3 engine, I would need the timing cover/sensor, upper 1x sprocket, cam sensor extension, and what else? I would run a new timing chain and valve springs of course
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Old Oct 17, 2011 | 08:14 PM
  #68  
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Outstanding "bang for the buck"...congrats on a successful mod
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Old Oct 17, 2011 | 09:06 PM
  #69  
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a question people haven't asked, so i guess i will. valvetrain noise? yes/no?

being so close to the ls7 cam, was curious to see if they shared the same base circle or not.
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Old Oct 17, 2011 | 09:37 PM
  #70  
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Originally Posted by pewterliftedz
you all forget that a cam with a lower LSA will have a tighter powerband. if your racing and have a converter there is no need for a wide powerband, your truck is only going to be sitting in the top 2000 rpms while racing. Now if its a street driven DD with no converter, then yes wide powerbands are nice.
Exactly, its fun to see the newbs think they've learned something then have their world shattered
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