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Cats or X-Pipe.. Alot of HPDE use.

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Old Feb 18, 2008 | 09:10 PM
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Default Cats or X-Pipe.. Alot of HPDE use.

I will be doing probably 2 HPDE's per month. The car is a weekend warrior. No trips to Starbucks with the Mrs. in the Z.

I have built the car for occasional street use, friday night get together or Sunday morning blast, but mostly track fun. I will be running....

Forged LS7 with 12.0-1 Compression ratio.
Ported heads with cam, springs, TI retainers, Morel Lifters, chromoly push rods. Ported T-body and Intake. LPE CAI. AR headers.
LG coilovers
Hoosiers
T1 Sways
Caravaggio seats w/ harness bar and 5 Pt harness
Stoptechs
LG Spindle ducts
Exedy Clutch/ Lightened flywheel

I have AR headers 1 7/8 with High flow cats. To make the most out of this engine do I need to go catless. I know with the X pipe it will be a little louder and I will probably smell a little gas. That aside...

How much power am I robbing from my engine, and those cats are going to be under a lot of heat and pressure..

What should I do? Even if the HP gain is small, Perhaps the engine will run better during those 20 minute HPDE...

Your thoughts... Anyone gone from cats to no cats and see any advantage at the track?
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Old Feb 18, 2008 | 09:17 PM
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You can always do electric cutouts before the cats then its your choice what you want insanely loud and more hp or quite and less hp, ive heard that you can usually pick up around 10hp without cats and a duals setup vs a catback
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Old Feb 20, 2008 | 09:38 AM
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Originally Posted by willsctsv

What should I do? Even if the HP gain is small, Perhaps the engine will run better during those 20 minute HPDE...

Your thoughts... Anyone gone from cats to no cats and see any advantage at the track?
i don't have personal experience with the corvette, but in general if you remove the cats the car not only breathes a bit easier but it'll help keep the overall engine temps down. if the car is mainly for DE's and trackdays i'd remove them.
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