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My pre h/c install dyno test

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Old Sep 28, 2007 | 01:05 AM
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Default My pre h/c install dyno test

I am doing my h/c full tear down and install starting Sat morning. So I had a dyno test done before to log changes. This was done on a SuperFlow dyno which has the lowest hp ratings of all the dynos. We were able to get 298.5 hp and 308.2 torque total. My car is not going to be a dyno queen, I wanted real world numbers. Below is my graph:





And a pic of the ride we are about to tear apart!!!


Last edited by GKE; Sep 28, 2007 at 01:10 AM.
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Old Sep 28, 2007 | 03:02 AM
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I wish I had gotten a 'before' dyno graph so I'd know exactly how much my h/c added. Keep us informed of your progress. Have fun and good luck.
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Old Sep 28, 2007 | 07:55 AM
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Why did they only rev it to around 5550 rpm?
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Old Sep 28, 2007 | 11:06 AM
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Originally Posted by DRR
Why did they only rev it to around 5550 rpm?
We did 3 runs and stopped where it made peak hp and where the torque dropped off. That is the limit of the curve.
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Old Sep 28, 2007 | 11:25 AM
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what in the world happened at 4500 rpm?Do you have an automatic?
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Old Sep 28, 2007 | 10:52 PM
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Originally Posted by uracowman
what in the world happened at 4500 rpm?Do you have an automatic?
Yup A4, seems like some slipping. It actually sounded like a VTEC when the cams shift, real weird. Might go with a new torque conv after the engine is done.
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Old Sep 28, 2007 | 11:41 PM
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Originally Posted by GKE
Yup A4, seems like some slipping. It actually sounded like a VTEC when the cams shift, real weird. Might go with a new torque conv after the engine is done.
I don't think it was slipping.I believe the person who was behind the wheel gunned the pedal either too early or too fast which caused it to shift down a gear.
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Old Sep 28, 2007 | 11:50 PM
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Did a cam and a lot of other related add ons about a month ago with Vettenuts. Hope you have as much fun as we did. These cars are fun to work on.

Good luck and I hope all goes well for you.
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Old Sep 29, 2007 | 11:00 AM
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Originally Posted by uracowman
I don't think it was slipping.I believe the person who was behind the wheel gunned the pedal either too early or too fast which caused it to shift down a gear.
No shifting at all. We ran it in 3rd for all runs and did a very slow roll on. I can show you run 1 where it shifted and the chart was all over the place. This run was very smooth, as was run 2 and both had the same weird pattern at that same spot but with no shifting at all.
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Old Oct 1, 2007 | 11:41 AM
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My guess is torque management or knock kicking in....that dip sure looks like it could be tuned out to give you more power in your stock configuration.
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