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6.0L 5-Speed Dyno Day Today

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Old 10-10-2008, 09:05 PM
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sorry man, I didnt mean to be a jerk about it. GTO's with ls2 dyno that much through stock exhaust. Are you sure its running right?
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Old 10-10-2008, 09:22 PM
  #102  
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Originally Posted by GMCtrk
something doesn't look right? The cam peaks around 5200? A 218/224 should pull to atleast 6000? It looks like you got a much smaller cam in there.
its because of the stock tube and manifold, they can't flow enough to keep climbing after 5200-5500 rpms. especially in 6.0's and 370's.
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Old 10-10-2008, 09:23 PM
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What was the fuel ratio and timing advance?
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Old 10-10-2008, 09:25 PM
  #104  
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27 deg total advance and 13.1:1 AFR.
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Old 10-10-2008, 09:25 PM
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Originally Posted by dug
the numbers suck. you could have made the same with your old ls6 cam.

Wow, way to poopoo on a guys person parade!
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Old 10-10-2008, 09:26 PM
  #106  
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Originally Posted by lsx10
its because of the stock tube and manifold, they can't flow enough to keep climbing after 5200-5500 rpms. especially in 6.0's and 370's.
I don't know about this. Has anyone been able to give any conclusive evidence to how many CFM the factory airbox will flow when left alone?
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Old 10-10-2008, 09:48 PM
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I was thinking that cam dropped off pretty suddenly as well
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Old 10-10-2008, 10:05 PM
  #108  
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At least we finally got numbers!! Good or bad. I really would have expected better through the man trans? Ditch the stock airbox! It's got to be killing you.
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Old 10-10-2008, 10:35 PM
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i would bet there's 25+ hp hiding in that air box
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Old 10-11-2008, 12:13 AM
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I don't know about the airbox hurting or not but i am still running the stock intake.
My ECSB has a 6.0l lq4 with a TR220/220/112 and with a stock lq4 tune it put down 350/356 and held the power til 6700rpms. With only a 11hp drop from peak which was at 6100rpms.
Is the problem the airbox? IDK but at least you got some nice tq....
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