Lost mid-range
Thread Starter
Pro
Joined: Jul 2009
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From: Gambrills Maryland
Lost mid-range
I just installed LG Street 1 3/4 long tubes with matching x pipe and metal matrix cats on my automatic 2003. I also had it tuned from the guys at ECS. The car is now flat in the mid range but pulls REALLY strong at higher RPM's. It feels like a super charger kicks in but it is not a smooth transistion of power from low to high rpm's. Is that normal or is something not setup right?
Premium Supporting Vendor
Joined: Oct 2004
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
Increase in top end sounds right, but not the loss in low end, I would be happy to log a pull on it again to see if theres a false knock or other existing issue causing it.
Thread Starter
Pro
Joined: Jul 2009
Posts: 503
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From: Gambrills Maryland
You recently did the mail order tune for me on this. I am the guy in Gambrills Maryland. Is it possible that something went wrong with the tune? If I slowly push the gas from a standstill there isnt much power until the tranny down shifts then it jumps like a supercharger just kicked in. How to we check whats going on?
Le Mans Master
Joined: May 2006
Posts: 7,856
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From: Hillsboro OR
You recently did the mail order tune for me on this. I am the guy in Gambrills Maryland. Is it possible that something went wrong with the tune? If I slowly push the gas from a standstill there isnt much power until the tranny down shifts then it jumps like a supercharger just kicked in. How to we check whats going on?
Safety Car
Joined: Apr 2007
Posts: 3,582
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From: SoCal CA
Not hard at all. I would just get a Z06 rear or a new one and swap them. Just bolts on to rear of trans but it is a lot of labor and I'd recommend a shop do it. Dont do a gears only swap. Rarely are they ever as quiet as stock after. Still, this shouldnt cause loss off power. You shouldve gained all across the curve. Maybe you should look into the tune you got and deff drive with a data logger to see whats up. If that exhaust is your only mod I dont think you'd gain very much from a tune, at least not for the money.
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Joined: Oct 2004
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
I would be happy to check the car over here if you have time to come up. I looked at your tune file, and you are spot on, but you might have some false knock from the headers. I have seen that a few times with that brand.
A 3.42 diff is the way to go, but you have stated you lost mid range so something is off I would assume.
A 3.42 diff is the way to go, but you have stated you lost mid range so something is off I would assume.
