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Weird Dip In Graph

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Old Feb 15, 2007 | 09:40 PM
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Ls1Envy's Avatar
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Default Weird Dip In Graph

Posting this for a friend. His Mods



2001 SS M6 3.42's

225 AFR Heads milled .042 (65cc)
236/236, 590/590, 112 LSA
GM MLS Gasket
PAceSetter Headers, w/ PS Y Pipe
ASP Pulley
Ls6 Intake/ Stock TB
Harland Sharp rockers
Stock MAF

Theres a Dip at 6200 and dosent come back to 6600
He says it just feels like it stops pulling.
I think it's the rocker arms.....
Power Just seems low for his Mods. Ran a 12.5@115
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Old Feb 15, 2007 | 10:19 PM
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From: Dracut, MA
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I had the same problem with the harland sharp rockers there a heavier rocker than stock they need a good spring. It could be knock too. Timing dropped at that particular point to it could be 22 then hit a 28 cell. Could be alot of things. Try changing back to stock rockers and log it and see whats the deal.
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Old Feb 16, 2007 | 07:49 AM
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Yeah, there going to change the rockers this weekend.

Did you pick up any when you changed back to the stock rockers?
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Old Mar 16, 2007 | 07:54 AM
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From: Toms River
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Originally Posted by Ls1Envy
Yeah, there going to change the rockers this weekend.

Did you pick up any when you changed back to the stock rockers?

Hello LS1Envy,

Have you had a chance to change over to the stock rockers, any results? The power number is low for the parts on the car. Would it be possible for the dyno shop to record the following: ECT, MAF, IAT, TP, Knock and Ignition Timing with a data recorder like autotap during the pull?

We would like to help anyway we can.
Sorry it took this long to find this post.

Thanks
Hank
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