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What do you start with when building an engine?

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Old 07-14-2009 | 01:51 PM
  #21  
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Originally Posted by y8s
you must have missed it i guess. probably sitting in the corner shaking wondering if 8.6:1 compression was going to make your car a dog.

anyway, at the same boost level, advancing the intake cam gained me at least 30 ft lbs (max 40ish) from 3k to 4k with positive gains from 2500-4500. similarly retarding the cam at the top end made a difference of 60 hp.

look at the graph again:
http://y8spec.com/dyno/taleoftwoturbos.jpg
green = retarded
red = advanced
both runs are at 9.5 psi. same dyno, same day. mixture was not ideal due to the drastic changes in VE.
basically the VVT allows me to take the tallest curve on each side. red on the left, green on the right.

here's a comparison of the idealized VVT curve from those two graphs and photoshop (though in practice it should be the same) against TurboTim's twins. I forget what boost he was at.
http://y8spec.com/dyno/twins_vs_2876.gif
blah blah blah, you're a retard.
Old 07-14-2009 | 01:53 PM
  #22  
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y8s
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Originally Posted by hustler
blah blah blah, you're a retard.
you can do better than that.
Old 07-14-2009 | 01:57 PM
  #23  
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Originally Posted by y8s
you can do better than that.
The estrogen injections must be getting to him.
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