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2 Cutouts Better Than 1 Cutout??

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Old 07-23-2011, 10:20 AM
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Default 2 Cutouts Better Than 1 Cutout??

I emailed QTP asking what they would recommend for my application. I have QTP LT, off road Y with GMMG CB CME.They told me 1-3" cutout would work after the Y. Could I install two 2 1/2" oval cutouts in the Y before it goes into one pipe? It seems like I would get a "Nasty Knarly" sound coming from each of the headers vs. just one cutout after both headers. I always thought 2 was better than one. What are your thoughts?
I'm a noob to this, so be gentle.
Old 07-23-2011, 11:27 AM
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Here's a link to a thread that was started maybe 2 weeks ago that should answer the same question. https://ls1tech.com/forums/generatio...o-cutouts.html
Old 07-23-2011, 11:28 AM
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Another variable you need to consider - you do not want the cutout too close to the O2 sensor or it will adversely affect its operation whenever the cutout(s) is open.
Old 07-23-2011, 11:30 AM
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One after the Y is plenty with no cats!
Old 07-23-2011, 02:32 PM
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Originally Posted by Darkman
Another variable you need to consider - you do not want the cutout too close to the O2 sensor or it will adversely affect its operation whenever the cutout(s) is open.
I don't have any O2 sensors or cats in my system.

Last edited by Bowtie-Bri; 07-23-2011 at 02:42 PM.
Old 07-23-2011, 06:37 PM
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are 2 girls better than 1? nuff sed
Old 07-23-2011, 11:29 PM
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Originally Posted by sjsingle1
are 2 girls better than 1? nuff sed
your reasoning is all wrong. is it 2 fat girls or 1 bangin hot chick?
Old 07-23-2011, 11:29 PM
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see what i mean?
Old 07-24-2011, 02:06 AM
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Originally Posted by SHovV
see what i mean?
Actually, in this case it seems to be the other way around.

You have the choice of 2 hot chicks, or 1 fat chick...

In general, it is always better to run 2 cutouts if you're going for top-end power.

2 cutouts for each header will always outflow 1 after the merge.
Old 07-24-2011, 09:30 PM
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So, would the 2.5" oval cutouts work for my application if they were mounted in the Y? Thanks for your help. Click on the link to see the ones I'm referring to: http://shop.quicktimeperformance.com...ct_detail&p=42
Old 07-24-2011, 09:49 PM
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Originally Posted by Suzaku
Actually, in this case it seems to be the other way around.

You have the choice of 2 hot chicks, or 1 fat chick...

In general, it is always better to run 2 cutouts if you're going for top-end power.

2 cutouts for each header will always outflow 1 after the merge.
Unless you can change your tune when you open the dual cutouts you will loose
power if your car is tuned through full exhaust. If you tune with the cutouts open and then close them up to run on the street you are going to be running rich.
Old 07-24-2011, 09:51 PM
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Originally Posted by Orange Juice
Unless you can change your tune when you open the dual cutouts you will loose
power if your car is tuned through full exhaust. If you tune with the cutouts open and then close them up to run on the street you are going to be running rich.
Yep, forgot that bit.




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