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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 05-07-2010, 08:23 PM   #1
jeepguy_1980

 
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QTP Cutout Ground Clearance?

I just got my QTP cutouts today and stopped by the muffler shop to have them installed. There was no way to install them without sacrificing ground clearance. The right side was particularly bad, leaving just 3.5" of clearance. Since they mount mid-car and have a large rectangular lip on them, the shop and I felt that it was not worth the risk. If one of the lips caught on a pot hole, RR track, etc... It would not be good news.

Does anyone have an installation method that doesn't sacrifice so much ground clearance?
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Old 05-07-2010, 10:42 PM   #2
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Old 05-07-2010, 11:18 PM   #3
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here's mine. I have had them on for almost 5-6 months now and have had no issues at all. Not even going over speed bumps. The Chevy dealer that I bought the car from installed them for me.
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Old 05-07-2010, 11:19 PM   #4
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Old 05-07-2010, 11:20 PM   #5
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They are both almost even with the frame rails, the right one does hang alittle lower though for some reason.
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Old 05-07-2010, 11:23 PM   #6
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Here's a drive by. The beginning is kinda slow so you can fast forward through it. Just keep your eye on my yellow camaro.
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Old 05-07-2010, 11:51 PM   #7
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My care was the test mule for these cutouts. Not one issue at all. Love them, love them love them.

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Old 05-08-2010, 05:42 AM   #8
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Quote:
Originally Posted by Chad's 2ss View Post
They are both almost even with the frame rails, the right one does hang alittle lower though for some reason.
That's because there are two fuel lines and two brake lines outboard of the right exhaust.

Would one of you mind posting a side profile picture?
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Old 05-08-2010, 01:06 PM   #9
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looks good
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Old 05-08-2010, 09:14 PM   #10
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I have had mine installed for about a month and have had no issues with them at all. I am so glad I bought these instead of getting a Borla or Loud Mouth permanent installed exhaust system. Just something as simple as going through a fast food drive through I can simply close the cutouts and I have no problem hearing.

Mine looks the same as Chad's and I have gone over speed bumps, RR tracks, etc with no problems.

I was concerned if I was making the right decision on the QTP's but I am so glad I bought them. You are going to love them. I think I like the sound with mine @ 50% open more than I do when they are wide open. I am curious what you other guys think sounds best; full open, 50% open, ? open.

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Old 05-08-2010, 09:19 PM   #11
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I just got the toggle switch, because I didn't want to deal with the remote. I might have to get the remote, because even QTP's dyno shows the car has no bottom end power with them installed.

I also printed out the pictures from QTP's website to take with me next time.
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Old 05-08-2010, 09:32 PM   #12
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I have these on my car and mine do not sit any lower than the frame rail. I LOVE them. You need a new exhaust shop
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Old 05-08-2010, 10:29 PM   #13
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Jeepguy-

Can you explain what you mean by this? Do you mean no increase in power? What is "bottom end power"? Or do you actually mean there is a decrease in power?

"QTP's dyno shows the car has no bottom end power with them installed."


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Old 05-08-2010, 11:48 PM   #14
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My dad put order for these.. getting installed by Jannetty.. post some vids.. dont see a problem. Jannetty wouldnt do if there were any problems
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Old 05-09-2010, 07:04 AM   #15
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Quote:
Originally Posted by Russ Hunsaker View Post
Jeepguy-

Can you explain what you mean by this? Do you mean no increase in power? What is "bottom end power"? Or do you actually mean there is a decrease in power?

"QTP's dyno shows the car has no bottom end power with them installed."


Russ
I heard it loses low end power and then I misread the dyno.

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Old 05-09-2010, 10:46 AM   #16
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They do lose bottom end power. Notice how their dyno starts at about 2300rpm...thats where the QTP hp/tq curve just passes the factory curve....
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Old 05-11-2010, 09:05 PM   #17
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I installed them today, but I can't use them. One of the motors has a recessed pin, so I can't open and close it. It's probably not good for the car to just open up one.
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Old 05-12-2010, 06:30 PM   #18
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Just to put a cap on this thread, I fixed the harness pin and finished the installation today.
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Old 09-26-2010, 09:13 PM   #19
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I just had a clearance issue with my QTPs....I was going into a steep driveway and they rubbed the side walk on both sides....I thought I should have parked on the street but decided to risk it

I backed out slowly immediately...left two short gashes in the driveway

I will look at it tomorrow to see if anything was damaged

Does anyone know what could happen if you catch one of these things on something? I'm worried I might have screwed up the the block where the header bolts screw into...like strip them out or something...I cringed when I heard the scrapping noise
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Old 09-29-2010, 03:34 PM   #20
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I notice that everyone seems to be installing these in the bend just after the cats. Is there a reason?

Why not after axle just before the muffler?

... this might be a way to get around the clearance issues... and reduce the cabin noise and fumes.
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Old 09-29-2010, 03:50 PM   #21
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Quote:
Originally Posted by Bell040 View Post
I notice that everyone seems to be installing these in the bend just after the cats. Is there a reason?

Why not after axle just before the muffler?

... this might be a way to get around the clearance issues... and reduce the cabin noise and fumes.

B/c they would stick out like a sore thumb. I don't think that fumes are a concern, and you probably don't open them up if you're worries about cabin noise.
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Old 09-29-2010, 04:06 PM   #22
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Quote:
Originally Posted by jeepguy_1980 View Post
B/c they would stick out like a sore thumb. I don't think that fumes are a concern, and you probably don't open them up if you're worries about cabin noise.
I had open headers for 2 days (well HF cats and x-pipe with no mufflers)... it was borderline unbearable. Maybe its not as bad for the guys with stock manifolds and cats.

I think that I may be able to hide them behind the rear air splitter (GFX). Since I dont have the big stock cans there may be room.

I was mainly asking if there is any performance or sound benifit from mounting them right behind the cats before the x-pipe.
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Old 09-29-2010, 04:17 PM   #23
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I don't have to drive with them open, they're only open when I want them loud. Also, you don't have to open them all the way, you can crack them or leave them in any other position between closed and full open. You don't have to buy the fancy controller to do this either.

I imagine that most of us that have these still have the stock cans, so mounting them in the rear isn't an option. I actually asked the shop about putting them in the rear for ground clearance issues and they said they would be very obvious.

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Old 09-29-2010, 04:22 PM   #24
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Well then maybe I will be the first to try it... since I have GFX and aftermarket magnaflows.
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