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LG Headers and LS6 Manifold

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Old Aug 18, 2004 | 06:51 PM
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Default LG Headers and LS6 Manifold

I installed a set of LG long tube headers and a LS6 intake manifold on my 98 and only increased the overall hp at peak rpms by 12 rwhp. However, the rwhp increased between 12 to 17 at other rpms.

Is that how the manufactures come up with their hp numbers (by using the best increase at any rmp?)

Before these mods I installed a Twin Flow intake and Borla exhaust.

I will have dyno tune numbers tomorrow.

Do these numbers seem low???

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Old Aug 18, 2004 | 07:39 PM
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The numbers only seem low if you already had a dyno "tune" done. If you havent had it tuned then it seems about right.
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Old Aug 18, 2004 | 08:00 PM
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Default LG Headers and LS6 Manifold

The car has not been dyno tuned. It is being tuned today.
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Old Aug 18, 2004 | 09:54 PM
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I picked up about 25RWHP with that setup AFTER dyno tune, so hopefully you will pick up some more after your tune. I was running a Blackwing at the time though, and I think they flow a little better than your filter...no turbulence from the dual cone I believe, but I doubt there is much difference.
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Old Aug 18, 2004 | 11:00 PM
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You need to get your car tuned.

Mark
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Old Aug 19, 2004 | 12:27 AM
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Default tune

The car was tuned today and I will have final numbers when I pick up the car tomorrow.
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Old Aug 19, 2004 | 12:31 PM
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Don't worry until after the car is tuned. The car untuned will be rich. Lean it out a bit with the tune, and you will find more HP...
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Old Aug 19, 2004 | 04:25 PM
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I picked up zero hp with my tune. Car runs MUCH better, but dyno'd within 3hp of when I drove up to when I left after the motor had cooled.

Then I went to the track and ran a new best twice and it was much hotter and MUCH more humid than the last time I went. So I figure it is money well spent.
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Old Aug 20, 2004 | 01:44 AM
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Default headers and intake

I just had my car tuned and I gained another 10rwhp. The tuning was by far cheaper then the mods. The LG headers and the ls6 intake added about 12 hp and the tune added 10 hp.

The mods are at about $300 per hp and the tune was at about $60 per hp.
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